diff --git a/nac3ast/src/constant.rs b/nac3ast/src/constant.rs
index b3a7ed5..af8a851 100644
--- a/nac3ast/src/constant.rs
+++ b/nac3ast/src/constant.rs
@@ -127,7 +127,7 @@ mod tests {
         use crate::fold::Fold;
         use crate::*;
 
-        let location = Location::new(0, 0);
+        let location = Location::new(0, 0, Default::default());
         let custom = ();
         let ast = Located {
             location,
diff --git a/nac3core/src/codegen/test.rs b/nac3core/src/codegen/test.rs
index 34fcf3f..4e63fd3 100644
--- a/nac3core/src/codegen/test.rs
+++ b/nac3core/src/codegen/test.rs
@@ -74,7 +74,7 @@ fn test_primitives() {
         d = a if c == 1 else 0
         return d
         "};
-    let statements = parse_program(source).unwrap();
+    let statements = parse_program(source, Default::default()).unwrap();
 
     let composer: TopLevelComposer = Default::default();
     let mut unifier = composer.unifier.clone();
@@ -193,12 +193,12 @@ fn test_simple_call() {
         a = foo(a)
         return a * 2
         "};
-    let statements_1 = parse_program(source_1).unwrap();
+    let statements_1 = parse_program(source_1, Default::default()).unwrap();
 
     let source_2 = indoc! { "
         return a + 1
         "};
-    let statements_2 = parse_program(source_2).unwrap();
+    let statements_2 = parse_program(source_2, Default::default()).unwrap();
 
     let composer: TopLevelComposer = Default::default();
     let mut unifier = composer.unifier.clone();
diff --git a/nac3core/src/toplevel/test.rs b/nac3core/src/toplevel/test.rs
index aa85457..1aef577 100644
--- a/nac3core/src/toplevel/test.rs
+++ b/nac3core/src/toplevel/test.rs
@@ -103,7 +103,7 @@ fn test_simple_register(source: Vec<&str>) {
     let mut composer: TopLevelComposer = Default::default();
 
     for s in source {
-        let ast = parse_program(s).unwrap();
+        let ast = parse_program(s, Default::default()).unwrap();
         let ast = ast[0].clone();
 
         composer.register_top_level(ast, None, "".into()).unwrap();
@@ -149,7 +149,7 @@ fn test_simple_function_analyze(source: Vec<&str>, tys: Vec<&str>, names: Vec<&s
         Arc::new(Resolver(internal_resolver.clone())) as Arc<dyn SymbolResolver + Send + Sync>;
 
     for s in source {
-        let ast = parse_program(s).unwrap();
+        let ast = parse_program(s, Default::default()).unwrap();
         let ast = ast[0].clone();
 
         let (id, def_id, ty) =
@@ -333,7 +333,7 @@ fn test_simple_function_analyze(source: Vec<&str>, tys: Vec<&str>, names: Vec<&s
                     pass
         "}
     ],
-    vec!["application of type vars to generic class is not currently supported (at line 4 column 24)"];
+    vec!["application of type vars to generic class is not currently supported (at unknown: line 4 column 24)"];
     "err no type var in generic app"
 )]
 #[test_case(
@@ -389,7 +389,7 @@ fn test_simple_function_analyze(source: Vec<&str>, tys: Vec<&str>, names: Vec<&s
             def __init__():
                 pass
     "}],
-    vec!["__init__ method must have a `self` parameter (at line 2 column 5)"];
+    vec!["__init__ method must have a `self` parameter (at unknown: line 2 column 5)"];
     "err no self_1"
 )]
 #[test_case(
@@ -411,7 +411,7 @@ fn test_simple_function_analyze(source: Vec<&str>, tys: Vec<&str>, names: Vec<&s
         "}
 
     ],
-    vec!["a class definition can only have at most one base class declaration and one generic declaration (at line 1 column 24)"];
+    vec!["a class definition can only have at most one base class declaration and one generic declaration (at unknown: line 1 column 24)"];
     "err multiple inheritance"
 )]
 #[test_case(
@@ -479,7 +479,7 @@ fn test_simple_function_analyze(source: Vec<&str>, tys: Vec<&str>, names: Vec<&s
                     pass
         "}
     ],
-    vec!["duplicate definition of class `A` ( at line 1 column 1)"];
+    vec!["duplicate definition of class `A` (at unknown: line 1 column 1)"];
     "class same name"
 )]
 fn test_analyze(source: Vec<&str>, res: Vec<&str>) {
@@ -499,7 +499,7 @@ fn test_analyze(source: Vec<&str>, res: Vec<&str>) {
         Arc::new(Resolver(internal_resolver.clone())) as Arc<dyn SymbolResolver + Send + Sync>;
 
     for s in source {
-        let ast = parse_program(s).unwrap();
+        let ast = parse_program(s, Default::default()).unwrap();
         let ast = ast[0].clone();
 
         let (id, def_id, ty) = {
@@ -683,7 +683,7 @@ fn test_inference(source: Vec<&str>, res: Vec<&str>) {
         Arc::new(Resolver(internal_resolver.clone())) as Arc<dyn SymbolResolver + Send + Sync>;
 
     for s in source {
-        let ast = parse_program(s).unwrap();
+        let ast = parse_program(s, Default::default()).unwrap();
         let ast = ast[0].clone();
 
         let (id, def_id, ty) = {
diff --git a/nac3core/src/typecheck/type_inferencer/test.rs b/nac3core/src/typecheck/type_inferencer/test.rs
index cc209bb..0d1492c 100644
--- a/nac3core/src/typecheck/type_inferencer/test.rs
+++ b/nac3core/src/typecheck/type_inferencer/test.rs
@@ -461,7 +461,7 @@ fn test_basic(source: &str, mapping: HashMap<&str, &str>, virtuals: &[(&str, &st
     defined_identifiers.insert("virtual".into());
     let mut inferencer = env.get_inferencer();
     inferencer.defined_identifiers = defined_identifiers.clone();
-    let statements = parse_program(source).unwrap();
+    let statements = parse_program(source, Default::default()).unwrap();
     let statements = statements
         .into_iter()
         .map(|v| inferencer.fold_stmt(v))
@@ -603,7 +603,7 @@ fn test_primitive_magic_methods(source: &str, mapping: HashMap<&str, &str>) {
     defined_identifiers.insert("virtual".into());
     let mut inferencer = env.get_inferencer();
     inferencer.defined_identifiers = defined_identifiers.clone();
-    let statements = parse_program(source).unwrap();
+    let statements = parse_program(source, Default::default()).unwrap();
     let statements = statements
         .into_iter()
         .map(|v| inferencer.fold_stmt(v))
diff --git a/nac3parser/src/lexer.rs b/nac3parser/src/lexer.rs
index 73e1878..7b04891 100644
--- a/nac3parser/src/lexer.rs
+++ b/nac3parser/src/lexer.rs
@@ -1339,7 +1339,7 @@ mod tests {
     const UNIX_EOL: &str = "\n";
 
     pub fn lex_source(source: &str) -> Vec<Tok> {
-        let lexer = make_tokenizer(source);
+        let lexer = make_tokenizer(source, Default::default());
         lexer.map(|x| x.unwrap().1).collect()
     }
 
diff --git a/nac3parser/src/parser.rs b/nac3parser/src/parser.rs
index 4eae0c6..55da3fa 100644
--- a/nac3parser/src/parser.rs
+++ b/nac3parser/src/parser.rs
@@ -37,11 +37,11 @@ pub fn parse_program(source: &str, file: FileName) -> Result<ast::Suite, ParseEr
 /// assert_eq!(
 ///     expr,
 ///     ast::Expr {
-///         location: ast::Location::new(1, 3),
+///         location: ast::Location::new(1, 3, Default::default()),
 ///         custom: (),
 ///         node: ast::ExprKind::BinOp {
 ///             left: Box::new(ast::Expr {
-///                 location: ast::Location::new(1, 1),
+///                 location: ast::Location::new(1, 1, Default::default()),
 ///                 custom: (),
 ///                 node: ast::ExprKind::Constant {
 ///                     value: ast::Constant::Int(1.into()),
@@ -50,7 +50,7 @@ pub fn parse_program(source: &str, file: FileName) -> Result<ast::Suite, ParseEr
 ///             }),
 ///             op: ast::Operator::Add,
 ///             right: Box::new(ast::Expr {
-///                 location: ast::Location::new(1, 5),
+///                 location: ast::Location::new(1, 5, Default::default()),
 ///                 custom: (),
 ///                 node: ast::ExprKind::Constant {
 ///                     value: ast::Constant::Int(2.into()),
@@ -86,42 +86,42 @@ mod tests {
 
     #[test]
     fn test_parse_empty() {
-        let parse_ast = parse_program("").unwrap();
+        let parse_ast = parse_program("", Default::default()).unwrap();
         insta::assert_debug_snapshot!(parse_ast);
     }
 
     #[test]
     fn test_parse_print_hello() {
         let source = String::from("print('Hello world')");
-        let parse_ast = parse_program(&source).unwrap();
+        let parse_ast = parse_program(&source, Default::default()).unwrap();
         insta::assert_debug_snapshot!(parse_ast);
     }
 
     #[test]
     fn test_parse_print_2() {
         let source = String::from("print('Hello world', 2)");
-        let parse_ast = parse_program(&source).unwrap();
+        let parse_ast = parse_program(&source, Default::default()).unwrap();
         insta::assert_debug_snapshot!(parse_ast);
     }
 
     #[test]
     fn test_parse_kwargs() {
         let source = String::from("my_func('positional', keyword=2)");
-        let parse_ast = parse_program(&source).unwrap();
+        let parse_ast = parse_program(&source, Default::default()).unwrap();
         insta::assert_debug_snapshot!(parse_ast);
     }
 
     #[test]
     fn test_parse_if_elif_else() {
         let source = String::from("if 1: 10\nelif 2: 20\nelse: 30");
-        let parse_ast = parse_program(&source).unwrap();
+        let parse_ast = parse_program(&source, Default::default()).unwrap();
         insta::assert_debug_snapshot!(parse_ast);
     }
 
     #[test]
     fn test_parse_lambda() {
         let source = "lambda x, y: x * y"; // lambda(x, y): x * y";
-        let parse_ast = parse_program(&source).unwrap();
+        let parse_ast = parse_program(&source, Default::default()).unwrap();
         insta::assert_debug_snapshot!(parse_ast);
     }
 
@@ -129,7 +129,7 @@ mod tests {
     fn test_parse_tuples() {
         let source = "a, b = 4, 5";
 
-        insta::assert_debug_snapshot!(parse_program(&source).unwrap());
+        insta::assert_debug_snapshot!(parse_program(&source, Default::default()).unwrap());
     }
 
     #[test]
@@ -140,7 +140,7 @@ class Foo(A, B):
   pass
  def method_with_default(self, arg='default'):
   pass";
-        insta::assert_debug_snapshot!(parse_program(&source).unwrap());
+        insta::assert_debug_snapshot!(parse_program(&source, Default::default()).unwrap());
     }
 
     #[test]
@@ -183,7 +183,7 @@ while i < 2: # nac3: 4
     # nac3: if1
     if 1: # nac3: if2
         3";
-        insta::assert_debug_snapshot!(parse_program(&source).unwrap());
+        insta::assert_debug_snapshot!(parse_program(&source, Default::default()).unwrap());
     }
     
     #[test]
@@ -196,7 +196,7 @@ while test: # nac3: while3
     # nac3: simple assign0 
     a = 3 # nac3: simple assign1
 ";
-        insta::assert_debug_snapshot!(parse_program(&source).unwrap());
+        insta::assert_debug_snapshot!(parse_program(&source, Default::default()).unwrap());
     }
 
     #[test]
@@ -215,7 +215,7 @@ if a: # nac3: small2
 for i in a: # nac3: for1
     pass
 ";
-        insta::assert_debug_snapshot!(parse_program(&source).unwrap());
+        insta::assert_debug_snapshot!(parse_program(&source, Default::default()).unwrap());
     }
 
     #[test]
@@ -224,6 +224,6 @@ for i in a: # nac3: for1
 if a: # nac3: something
 a = 3
 ";
-        assert!(parse_program(&source).is_err());
+        assert!(parse_program(&source, Default::default()).is_err());
     }
 }
diff --git a/nac3parser/src/snapshots/nac3parser__fstring__tests__fstring_parse_selfdocumenting_base.snap b/nac3parser/src/snapshots/nac3parser__fstring__tests__fstring_parse_selfdocumenting_base.snap
index 3315600..39e8b76 100644
--- a/nac3parser/src/snapshots/nac3parser__fstring__tests__fstring_parse_selfdocumenting_base.snap
+++ b/nac3parser/src/snapshots/nac3parser__fstring__tests__fstring_parse_selfdocumenting_base.snap
@@ -1,11 +1,16 @@
 ---
-source: parser/src/fstring.rs
+source: nac3parser/src/fstring.rs
+assertion_line: 327
 expression: parse_ast
+
 ---
 Located {
     location: Location {
         row: 0,
         column: 0,
+        file: FileName(
+            "unknown",
+        ),
     },
     custom: (),
     node: JoinedStr {
@@ -14,6 +19,9 @@ Located {
                 location: Location {
                     row: 0,
                     column: 0,
+                    file: FileName(
+                        "unknown",
+                    ),
                 },
                 custom: (),
                 node: Constant {
@@ -27,6 +35,9 @@ Located {
                 location: Location {
                     row: 0,
                     column: 0,
+                    file: FileName(
+                        "unknown",
+                    ),
                 },
                 custom: (),
                 node: Constant {
@@ -40,6 +51,9 @@ Located {
                 location: Location {
                     row: 0,
                     column: 0,
+                    file: FileName(
+                        "unknown",
+                    ),
                 },
                 custom: (),
                 node: FormattedValue {
@@ -47,6 +61,9 @@ Located {
                         location: Location {
                             row: 1,
                             column: 2,
+                            file: FileName(
+                                "unknown",
+                            ),
                         },
                         custom: (),
                         node: Name {
diff --git a/nac3parser/src/snapshots/nac3parser__fstring__tests__fstring_parse_selfdocumenting_base_more.snap b/nac3parser/src/snapshots/nac3parser__fstring__tests__fstring_parse_selfdocumenting_base_more.snap
index 6cc933d..d07c7fa 100644
--- a/nac3parser/src/snapshots/nac3parser__fstring__tests__fstring_parse_selfdocumenting_base_more.snap
+++ b/nac3parser/src/snapshots/nac3parser__fstring__tests__fstring_parse_selfdocumenting_base_more.snap
@@ -1,11 +1,16 @@
 ---
-source: parser/src/fstring.rs
+source: nac3parser/src/fstring.rs
+assertion_line: 335
 expression: parse_ast
+
 ---
 Located {
     location: Location {
         row: 0,
         column: 0,
+        file: FileName(
+            "unknown",
+        ),
     },
     custom: (),
     node: JoinedStr {
@@ -14,6 +19,9 @@ Located {
                 location: Location {
                     row: 0,
                     column: 0,
+                    file: FileName(
+                        "unknown",
+                    ),
                 },
                 custom: (),
                 node: Constant {
@@ -27,6 +35,9 @@ Located {
                 location: Location {
                     row: 0,
                     column: 0,
+                    file: FileName(
+                        "unknown",
+                    ),
                 },
                 custom: (),
                 node: Constant {
@@ -40,6 +51,9 @@ Located {
                 location: Location {
                     row: 0,
                     column: 0,
+                    file: FileName(
+                        "unknown",
+                    ),
                 },
                 custom: (),
                 node: Constant {
@@ -53,6 +67,9 @@ Located {
                 location: Location {
                     row: 0,
                     column: 0,
+                    file: FileName(
+                        "unknown",
+                    ),
                 },
                 custom: (),
                 node: FormattedValue {
@@ -60,6 +77,9 @@ Located {
                         location: Location {
                             row: 1,
                             column: 2,
+                            file: FileName(
+                                "unknown",
+                            ),
                         },
                         custom: (),
                         node: Name {
@@ -75,6 +95,9 @@ Located {
                 location: Location {
                     row: 0,
                     column: 0,
+                    file: FileName(
+                        "unknown",
+                    ),
                 },
                 custom: (),
                 node: Constant {
@@ -88,6 +111,9 @@ Located {
                 location: Location {
                     row: 0,
                     column: 0,
+                    file: FileName(
+                        "unknown",
+                    ),
                 },
                 custom: (),
                 node: Constant {
@@ -101,6 +127,9 @@ Located {
                 location: Location {
                     row: 0,
                     column: 0,
+                    file: FileName(
+                        "unknown",
+                    ),
                 },
                 custom: (),
                 node: Constant {
@@ -114,6 +143,9 @@ Located {
                 location: Location {
                     row: 0,
                     column: 0,
+                    file: FileName(
+                        "unknown",
+                    ),
                 },
                 custom: (),
                 node: FormattedValue {
@@ -121,6 +153,9 @@ Located {
                         location: Location {
                             row: 1,
                             column: 2,
+                            file: FileName(
+                                "unknown",
+                            ),
                         },
                         custom: (),
                         node: Name {
diff --git a/nac3parser/src/snapshots/nac3parser__fstring__tests__fstring_parse_selfdocumenting_format.snap b/nac3parser/src/snapshots/nac3parser__fstring__tests__fstring_parse_selfdocumenting_format.snap
index e0713f5..6dc7c42 100644
--- a/nac3parser/src/snapshots/nac3parser__fstring__tests__fstring_parse_selfdocumenting_format.snap
+++ b/nac3parser/src/snapshots/nac3parser__fstring__tests__fstring_parse_selfdocumenting_format.snap
@@ -1,11 +1,16 @@
 ---
-source: parser/src/fstring.rs
+source: nac3parser/src/fstring.rs
+assertion_line: 343
 expression: parse_ast
+
 ---
 Located {
     location: Location {
         row: 0,
         column: 0,
+        file: FileName(
+            "unknown",
+        ),
     },
     custom: (),
     node: JoinedStr {
@@ -14,6 +19,9 @@ Located {
                 location: Location {
                     row: 0,
                     column: 0,
+                    file: FileName(
+                        "unknown",
+                    ),
                 },
                 custom: (),
                 node: Constant {
@@ -27,6 +35,9 @@ Located {
                 location: Location {
                     row: 0,
                     column: 0,
+                    file: FileName(
+                        "unknown",
+                    ),
                 },
                 custom: (),
                 node: Constant {
@@ -40,6 +51,9 @@ Located {
                 location: Location {
                     row: 0,
                     column: 0,
+                    file: FileName(
+                        "unknown",
+                    ),
                 },
                 custom: (),
                 node: FormattedValue {
@@ -47,6 +61,9 @@ Located {
                         location: Location {
                             row: 1,
                             column: 2,
+                            file: FileName(
+                                "unknown",
+                            ),
                         },
                         custom: (),
                         node: Name {
@@ -60,6 +77,9 @@ Located {
                             location: Location {
                                 row: 0,
                                 column: 0,
+                                file: FileName(
+                                    "unknown",
+                                ),
                             },
                             custom: (),
                             node: Constant {
diff --git a/nac3parser/src/snapshots/nac3parser__fstring__tests__parse_empty_fstring.snap b/nac3parser/src/snapshots/nac3parser__fstring__tests__parse_empty_fstring.snap
index 8506386..c04609b 100644
--- a/nac3parser/src/snapshots/nac3parser__fstring__tests__parse_empty_fstring.snap
+++ b/nac3parser/src/snapshots/nac3parser__fstring__tests__parse_empty_fstring.snap
@@ -1,11 +1,16 @@
 ---
-source: parser/src/fstring.rs
+source: nac3parser/src/fstring.rs
+assertion_line: 319
 expression: "parse_fstring(\"\").unwrap()"
+
 ---
 Located {
     location: Location {
         row: 0,
         column: 0,
+        file: FileName(
+            "unknown",
+        ),
     },
     custom: (),
     node: Constant {
diff --git a/nac3parser/src/snapshots/nac3parser__fstring__tests__parse_fstring.snap b/nac3parser/src/snapshots/nac3parser__fstring__tests__parse_fstring.snap
index 457853a..f477aeb 100644
--- a/nac3parser/src/snapshots/nac3parser__fstring__tests__parse_fstring.snap
+++ b/nac3parser/src/snapshots/nac3parser__fstring__tests__parse_fstring.snap
@@ -1,11 +1,16 @@
 ---
-source: parser/src/fstring.rs
+source: nac3parser/src/fstring.rs
+assertion_line: 298
 expression: parse_ast
+
 ---
 Located {
     location: Location {
         row: 0,
         column: 0,
+        file: FileName(
+            "unknown",
+        ),
     },
     custom: (),
     node: JoinedStr {
@@ -14,6 +19,9 @@ Located {
                 location: Location {
                     row: 0,
                     column: 0,
+                    file: FileName(
+                        "unknown",
+                    ),
                 },
                 custom: (),
                 node: FormattedValue {
@@ -21,6 +29,9 @@ Located {
                         location: Location {
                             row: 1,
                             column: 2,
+                            file: FileName(
+                                "unknown",
+                            ),
                         },
                         custom: (),
                         node: Name {
@@ -36,6 +47,9 @@ Located {
                 location: Location {
                     row: 0,
                     column: 0,
+                    file: FileName(
+                        "unknown",
+                    ),
                 },
                 custom: (),
                 node: FormattedValue {
@@ -43,6 +57,9 @@ Located {
                         location: Location {
                             row: 1,
                             column: 3,
+                            file: FileName(
+                                "unknown",
+                            ),
                         },
                         custom: (),
                         node: Name {
@@ -58,6 +75,9 @@ Located {
                 location: Location {
                     row: 0,
                     column: 0,
+                    file: FileName(
+                        "unknown",
+                    ),
                 },
                 custom: (),
                 node: Constant {
diff --git a/nac3parser/src/snapshots/nac3parser__fstring__tests__parse_fstring_equals.snap b/nac3parser/src/snapshots/nac3parser__fstring__tests__parse_fstring_equals.snap
index 6514281..62b4c68 100644
--- a/nac3parser/src/snapshots/nac3parser__fstring__tests__parse_fstring_equals.snap
+++ b/nac3parser/src/snapshots/nac3parser__fstring__tests__parse_fstring_equals.snap
@@ -8,6 +8,9 @@ Located {
     location: Location {
         row: 0,
         column: 0,
+        file: FileName(
+            "unknown",
+        ),
     },
     custom: (),
     node: FormattedValue {
@@ -15,6 +18,9 @@ Located {
             location: Location {
                 row: 1,
                 column: 5,
+                file: FileName(
+                    "unknown",
+                ),
             },
             custom: (),
             node: Compare {
@@ -22,6 +28,9 @@ Located {
                     location: Location {
                         row: 1,
                         column: 2,
+                        file: FileName(
+                            "unknown",
+                        ),
                     },
                     custom: (),
                     node: Constant {
@@ -41,6 +50,9 @@ Located {
                         location: Location {
                             row: 1,
                             column: 8,
+                            file: FileName(
+                                "unknown",
+                            ),
                         },
                         custom: (),
                         node: Constant {
diff --git a/nac3parser/src/snapshots/nac3parser__fstring__tests__parse_fstring_nested_spec.snap b/nac3parser/src/snapshots/nac3parser__fstring__tests__parse_fstring_nested_spec.snap
index 8ecd704..bfbecb8 100644
--- a/nac3parser/src/snapshots/nac3parser__fstring__tests__parse_fstring_nested_spec.snap
+++ b/nac3parser/src/snapshots/nac3parser__fstring__tests__parse_fstring_nested_spec.snap
@@ -1,11 +1,16 @@
 ---
-source: parser/src/fstring.rs
+source: nac3parser/src/fstring.rs
+assertion_line: 306
 expression: parse_ast
+
 ---
 Located {
     location: Location {
         row: 0,
         column: 0,
+        file: FileName(
+            "unknown",
+        ),
     },
     custom: (),
     node: FormattedValue {
@@ -13,6 +18,9 @@ Located {
             location: Location {
                 row: 1,
                 column: 2,
+                file: FileName(
+                    "unknown",
+                ),
             },
             custom: (),
             node: Name {
@@ -26,6 +34,9 @@ Located {
                 location: Location {
                     row: 0,
                     column: 0,
+                    file: FileName(
+                        "unknown",
+                    ),
                 },
                 custom: (),
                 node: FormattedValue {
@@ -33,6 +44,9 @@ Located {
                         location: Location {
                             row: 1,
                             column: 2,
+                            file: FileName(
+                                "unknown",
+                            ),
                         },
                         custom: (),
                         node: Name {
diff --git a/nac3parser/src/snapshots/nac3parser__fstring__tests__parse_fstring_not_equals.snap b/nac3parser/src/snapshots/nac3parser__fstring__tests__parse_fstring_not_equals.snap
index 2eb3b3e..b29d04e 100644
--- a/nac3parser/src/snapshots/nac3parser__fstring__tests__parse_fstring_not_equals.snap
+++ b/nac3parser/src/snapshots/nac3parser__fstring__tests__parse_fstring_not_equals.snap
@@ -8,6 +8,9 @@ Located {
     location: Location {
         row: 0,
         column: 0,
+        file: FileName(
+            "unknown",
+        ),
     },
     custom: (),
     node: FormattedValue {
@@ -15,6 +18,9 @@ Located {
             location: Location {
                 row: 1,
                 column: 4,
+                file: FileName(
+                    "unknown",
+                ),
             },
             custom: (),
             node: Compare {
@@ -22,6 +28,9 @@ Located {
                     location: Location {
                         row: 1,
                         column: 2,
+                        file: FileName(
+                            "unknown",
+                        ),
                     },
                     custom: (),
                     node: Constant {
@@ -41,6 +50,9 @@ Located {
                         location: Location {
                             row: 1,
                             column: 7,
+                            file: FileName(
+                                "unknown",
+                            ),
                         },
                         custom: (),
                         node: Constant {
diff --git a/nac3parser/src/snapshots/nac3parser__fstring__tests__parse_fstring_not_nested_spec.snap b/nac3parser/src/snapshots/nac3parser__fstring__tests__parse_fstring_not_nested_spec.snap
index 12147eb..68228e1 100644
--- a/nac3parser/src/snapshots/nac3parser__fstring__tests__parse_fstring_not_nested_spec.snap
+++ b/nac3parser/src/snapshots/nac3parser__fstring__tests__parse_fstring_not_nested_spec.snap
@@ -1,11 +1,16 @@
 ---
-source: parser/src/fstring.rs
+source: nac3parser/src/fstring.rs
+assertion_line: 314
 expression: parse_ast
+
 ---
 Located {
     location: Location {
         row: 0,
         column: 0,
+        file: FileName(
+            "unknown",
+        ),
     },
     custom: (),
     node: FormattedValue {
@@ -13,6 +18,9 @@ Located {
             location: Location {
                 row: 1,
                 column: 2,
+                file: FileName(
+                    "unknown",
+                ),
             },
             custom: (),
             node: Name {
@@ -26,6 +34,9 @@ Located {
                 location: Location {
                     row: 0,
                     column: 0,
+                    file: FileName(
+                        "unknown",
+                    ),
                 },
                 custom: (),
                 node: Constant {
diff --git a/nac3parser/src/snapshots/nac3parser__fstring__tests__parse_fstring_selfdoc_prec_space.snap b/nac3parser/src/snapshots/nac3parser__fstring__tests__parse_fstring_selfdoc_prec_space.snap
index 4b9b445..9f4cc34 100644
--- a/nac3parser/src/snapshots/nac3parser__fstring__tests__parse_fstring_selfdoc_prec_space.snap
+++ b/nac3parser/src/snapshots/nac3parser__fstring__tests__parse_fstring_selfdoc_prec_space.snap
@@ -1,11 +1,16 @@
 ---
-source: parser/src/fstring.rs
+source: nac3parser/src/fstring.rs
+assertion_line: 389
 expression: parse_ast
+
 ---
 Located {
     location: Location {
         row: 0,
         column: 0,
+        file: FileName(
+            "unknown",
+        ),
     },
     custom: (),
     node: JoinedStr {
@@ -14,6 +19,9 @@ Located {
                 location: Location {
                     row: 0,
                     column: 0,
+                    file: FileName(
+                        "unknown",
+                    ),
                 },
                 custom: (),
                 node: Constant {
@@ -27,6 +35,9 @@ Located {
                 location: Location {
                     row: 0,
                     column: 0,
+                    file: FileName(
+                        "unknown",
+                    ),
                 },
                 custom: (),
                 node: Constant {
@@ -40,6 +51,9 @@ Located {
                 location: Location {
                     row: 0,
                     column: 0,
+                    file: FileName(
+                        "unknown",
+                    ),
                 },
                 custom: (),
                 node: FormattedValue {
@@ -47,6 +61,9 @@ Located {
                         location: Location {
                             row: 1,
                             column: 2,
+                            file: FileName(
+                                "unknown",
+                            ),
                         },
                         custom: (),
                         node: Name {
diff --git a/nac3parser/src/snapshots/nac3parser__fstring__tests__parse_fstring_selfdoc_trailing_space.snap b/nac3parser/src/snapshots/nac3parser__fstring__tests__parse_fstring_selfdoc_trailing_space.snap
index 09c0f32..11b4ff5 100644
--- a/nac3parser/src/snapshots/nac3parser__fstring__tests__parse_fstring_selfdoc_trailing_space.snap
+++ b/nac3parser/src/snapshots/nac3parser__fstring__tests__parse_fstring_selfdoc_trailing_space.snap
@@ -1,11 +1,16 @@
 ---
-source: parser/src/fstring.rs
+source: nac3parser/src/fstring.rs
+assertion_line: 396
 expression: parse_ast
+
 ---
 Located {
     location: Location {
         row: 0,
         column: 0,
+        file: FileName(
+            "unknown",
+        ),
     },
     custom: (),
     node: JoinedStr {
@@ -14,6 +19,9 @@ Located {
                 location: Location {
                     row: 0,
                     column: 0,
+                    file: FileName(
+                        "unknown",
+                    ),
                 },
                 custom: (),
                 node: Constant {
@@ -27,6 +35,9 @@ Located {
                 location: Location {
                     row: 0,
                     column: 0,
+                    file: FileName(
+                        "unknown",
+                    ),
                 },
                 custom: (),
                 node: Constant {
@@ -40,6 +51,9 @@ Located {
                 location: Location {
                     row: 0,
                     column: 0,
+                    file: FileName(
+                        "unknown",
+                    ),
                 },
                 custom: (),
                 node: FormattedValue {
@@ -47,6 +61,9 @@ Located {
                         location: Location {
                             row: 1,
                             column: 2,
+                            file: FileName(
+                                "unknown",
+                            ),
                         },
                         custom: (),
                         node: Name {
diff --git a/nac3parser/src/snapshots/nac3parser__fstring__tests__parse_fstring_yield_expr.snap b/nac3parser/src/snapshots/nac3parser__fstring__tests__parse_fstring_yield_expr.snap
index 2330059..64958e2 100644
--- a/nac3parser/src/snapshots/nac3parser__fstring__tests__parse_fstring_yield_expr.snap
+++ b/nac3parser/src/snapshots/nac3parser__fstring__tests__parse_fstring_yield_expr.snap
@@ -1,11 +1,16 @@
 ---
-source: parser/src/fstring.rs
+source: nac3parser/src/fstring.rs
+assertion_line: 403
 expression: parse_ast
+
 ---
 Located {
     location: Location {
         row: 0,
         column: 0,
+        file: FileName(
+            "unknown",
+        ),
     },
     custom: (),
     node: FormattedValue {
@@ -13,6 +18,9 @@ Located {
             location: Location {
                 row: 1,
                 column: 2,
+                file: FileName(
+                    "unknown",
+                ),
             },
             custom: (),
             node: Yield {
diff --git a/nac3parser/src/snapshots/nac3parser__parser__tests__comment_ambiguity.snap b/nac3parser/src/snapshots/nac3parser__parser__tests__comment_ambiguity.snap
index 3886734..421e3f2 100644
--- a/nac3parser/src/snapshots/nac3parser__parser__tests__comment_ambiguity.snap
+++ b/nac3parser/src/snapshots/nac3parser__parser__tests__comment_ambiguity.snap
@@ -1,7 +1,7 @@
 ---
 source: nac3parser/src/parser.rs
 assertion_line: 218
-expression: parse_program(&source).unwrap()
+expression: "parse_program(&source, Default::default()).unwrap()"
 
 ---
 [
@@ -9,6 +9,9 @@ expression: parse_program(&source).unwrap()
         location: Location {
             row: 1,
             column: 1,
+            file: FileName(
+                "unknown",
+            ),
         },
         custom: (),
         node: If {
@@ -16,6 +19,9 @@ expression: parse_program(&source).unwrap()
                 location: Location {
                     row: 1,
                     column: 4,
+                    file: FileName(
+                        "unknown",
+                    ),
                 },
                 custom: (),
                 node: Name {
@@ -28,6 +34,9 @@ expression: parse_program(&source).unwrap()
                     location: Location {
                         row: 1,
                         column: 7,
+                        file: FileName(
+                            "unknown",
+                        ),
                     },
                     custom: (),
                     node: Expr {
@@ -35,6 +44,9 @@ expression: parse_program(&source).unwrap()
                             location: Location {
                                 row: 1,
                                 column: 7,
+                                file: FileName(
+                                    "unknown",
+                                ),
                             },
                             custom: (),
                             node: Name {
@@ -56,6 +68,9 @@ expression: parse_program(&source).unwrap()
         location: Location {
             row: 2,
             column: 1,
+            file: FileName(
+                "unknown",
+            ),
         },
         custom: (),
         node: If {
@@ -63,6 +78,9 @@ expression: parse_program(&source).unwrap()
                 location: Location {
                     row: 2,
                     column: 4,
+                    file: FileName(
+                        "unknown",
+                    ),
                 },
                 custom: (),
                 node: Name {
@@ -75,6 +93,9 @@ expression: parse_program(&source).unwrap()
                     location: Location {
                         row: 2,
                         column: 7,
+                        file: FileName(
+                            "unknown",
+                        ),
                     },
                     custom: (),
                     node: Expr {
@@ -82,6 +103,9 @@ expression: parse_program(&source).unwrap()
                             location: Location {
                                 row: 2,
                                 column: 7,
+                                file: FileName(
+                                    "unknown",
+                                ),
                             },
                             custom: (),
                             node: Name {
@@ -103,6 +127,9 @@ expression: parse_program(&source).unwrap()
         location: Location {
             row: 3,
             column: 1,
+            file: FileName(
+                "unknown",
+            ),
         },
         custom: (),
         node: If {
@@ -110,6 +137,9 @@ expression: parse_program(&source).unwrap()
                 location: Location {
                     row: 3,
                     column: 4,
+                    file: FileName(
+                        "unknown",
+                    ),
                 },
                 custom: (),
                 node: Name {
@@ -122,6 +152,9 @@ expression: parse_program(&source).unwrap()
                     location: Location {
                         row: 4,
                         column: 5,
+                        file: FileName(
+                            "unknown",
+                        ),
                     },
                     custom: (),
                     node: Expr {
@@ -129,6 +162,9 @@ expression: parse_program(&source).unwrap()
                             location: Location {
                                 row: 4,
                                 column: 5,
+                                file: FileName(
+                                    "unknown",
+                                ),
                             },
                             custom: (),
                             node: Name {
@@ -143,6 +179,9 @@ expression: parse_program(&source).unwrap()
                     location: Location {
                         row: 4,
                         column: 8,
+                        file: FileName(
+                            "unknown",
+                        ),
                     },
                     custom: (),
                     node: Expr {
@@ -150,6 +189,9 @@ expression: parse_program(&source).unwrap()
                             location: Location {
                                 row: 4,
                                 column: 10,
+                                file: FileName(
+                                    "unknown",
+                                ),
                             },
                             custom: (),
                             node: BinOp {
@@ -157,6 +199,9 @@ expression: parse_program(&source).unwrap()
                                     location: Location {
                                         row: 4,
                                         column: 8,
+                                        file: FileName(
+                                            "unknown",
+                                        ),
                                     },
                                     custom: (),
                                     node: Name {
@@ -169,6 +214,9 @@ expression: parse_program(&source).unwrap()
                                     location: Location {
                                         row: 4,
                                         column: 12,
+                                        file: FileName(
+                                            "unknown",
+                                        ),
                                     },
                                     custom: (),
                                     node: Constant {
@@ -198,6 +246,9 @@ expression: parse_program(&source).unwrap()
         location: Location {
             row: 5,
             column: 1,
+            file: FileName(
+                "unknown",
+            ),
         },
         custom: (),
         node: Assign {
@@ -206,6 +257,9 @@ expression: parse_program(&source).unwrap()
                     location: Location {
                         row: 5,
                         column: 1,
+                        file: FileName(
+                            "unknown",
+                        ),
                     },
                     custom: (),
                     node: Name {
@@ -218,6 +272,9 @@ expression: parse_program(&source).unwrap()
                 location: Location {
                     row: 5,
                     column: 5,
+                    file: FileName(
+                        "unknown",
+                    ),
                 },
                 custom: (),
                 node: Constant {
@@ -237,6 +294,9 @@ expression: parse_program(&source).unwrap()
         location: Location {
             row: 5,
             column: 8,
+            file: FileName(
+                "unknown",
+            ),
         },
         custom: (),
         node: Expr {
@@ -244,6 +304,9 @@ expression: parse_program(&source).unwrap()
                 location: Location {
                     row: 5,
                     column: 10,
+                    file: FileName(
+                        "unknown",
+                    ),
                 },
                 custom: (),
                 node: BinOp {
@@ -251,6 +314,9 @@ expression: parse_program(&source).unwrap()
                         location: Location {
                             row: 5,
                             column: 8,
+                            file: FileName(
+                                "unknown",
+                            ),
                         },
                         custom: (),
                         node: Name {
@@ -263,6 +329,9 @@ expression: parse_program(&source).unwrap()
                         location: Location {
                             row: 5,
                             column: 12,
+                            file: FileName(
+                                "unknown",
+                            ),
                         },
                         custom: (),
                         node: Constant {
@@ -283,6 +352,9 @@ expression: parse_program(&source).unwrap()
         location: Location {
             row: 5,
             column: 15,
+            file: FileName(
+                "unknown",
+            ),
         },
         custom: (),
         node: Assign {
@@ -291,6 +363,9 @@ expression: parse_program(&source).unwrap()
                     location: Location {
                         row: 5,
                         column: 15,
+                        file: FileName(
+                            "unknown",
+                        ),
                     },
                     custom: (),
                     node: Name {
@@ -303,6 +378,9 @@ expression: parse_program(&source).unwrap()
                 location: Location {
                     row: 5,
                     column: 19,
+                    file: FileName(
+                        "unknown",
+                    ),
                 },
                 custom: (),
                 node: Name {
@@ -320,6 +398,9 @@ expression: parse_program(&source).unwrap()
         location: Location {
             row: 8,
             column: 1,
+            file: FileName(
+                "unknown",
+            ),
         },
         custom: (),
         node: Assign {
@@ -328,6 +409,9 @@ expression: parse_program(&source).unwrap()
                     location: Location {
                         row: 8,
                         column: 1,
+                        file: FileName(
+                            "unknown",
+                        ),
                     },
                     custom: (),
                     node: Name {
@@ -340,6 +424,9 @@ expression: parse_program(&source).unwrap()
                 location: Location {
                     row: 8,
                     column: 6,
+                    file: FileName(
+                        "unknown",
+                    ),
                 },
                 custom: (),
                 node: Constant {
@@ -363,6 +450,9 @@ expression: parse_program(&source).unwrap()
         location: Location {
             row: 9,
             column: 1,
+            file: FileName(
+                "unknown",
+            ),
         },
         custom: (),
         node: If {
@@ -370,6 +460,9 @@ expression: parse_program(&source).unwrap()
                 location: Location {
                     row: 9,
                     column: 4,
+                    file: FileName(
+                        "unknown",
+                    ),
                 },
                 custom: (),
                 node: Name {
@@ -382,6 +475,9 @@ expression: parse_program(&source).unwrap()
                     location: Location {
                         row: 10,
                         column: 5,
+                        file: FileName(
+                            "unknown",
+                        ),
                     },
                     custom: (),
                     node: Expr {
@@ -389,6 +485,9 @@ expression: parse_program(&source).unwrap()
                             location: Location {
                                 row: 10,
                                 column: 5,
+                                file: FileName(
+                                    "unknown",
+                                ),
                             },
                             custom: (),
                             node: Name {
@@ -410,6 +509,9 @@ expression: parse_program(&source).unwrap()
         location: Location {
             row: 11,
             column: 1,
+            file: FileName(
+                "unknown",
+            ),
         },
         custom: (),
         node: For {
@@ -417,6 +519,9 @@ expression: parse_program(&source).unwrap()
                 location: Location {
                     row: 11,
                     column: 5,
+                    file: FileName(
+                        "unknown",
+                    ),
                 },
                 custom: (),
                 node: Name {
@@ -428,6 +533,9 @@ expression: parse_program(&source).unwrap()
                 location: Location {
                     row: 11,
                     column: 10,
+                    file: FileName(
+                        "unknown",
+                    ),
                 },
                 custom: (),
                 node: Name {
@@ -440,6 +548,9 @@ expression: parse_program(&source).unwrap()
                     location: Location {
                         row: 12,
                         column: 5,
+                        file: FileName(
+                            "unknown",
+                        ),
                     },
                     custom: (),
                     node: Pass {
diff --git a/nac3parser/src/snapshots/nac3parser__parser__tests__more_comment.snap b/nac3parser/src/snapshots/nac3parser__parser__tests__more_comment.snap
index 918c41f..15d27b4 100644
--- a/nac3parser/src/snapshots/nac3parser__parser__tests__more_comment.snap
+++ b/nac3parser/src/snapshots/nac3parser__parser__tests__more_comment.snap
@@ -1,7 +1,7 @@
 ---
 source: nac3parser/src/parser.rs
 assertion_line: 186
-expression: parse_program(&source).unwrap()
+expression: "parse_program(&source, Default::default()).unwrap()"
 
 ---
 [
@@ -9,6 +9,9 @@ expression: parse_program(&source).unwrap()
         location: Location {
             row: 1,
             column: 1,
+            file: FileName(
+                "unknown",
+            ),
         },
         custom: (),
         node: AnnAssign {
@@ -16,6 +19,9 @@ expression: parse_program(&source).unwrap()
                 location: Location {
                     row: 1,
                     column: 1,
+                    file: FileName(
+                        "unknown",
+                    ),
                 },
                 custom: (),
                 node: Name {
@@ -27,6 +33,9 @@ expression: parse_program(&source).unwrap()
                 location: Location {
                     row: 1,
                     column: 4,
+                    file: FileName(
+                        "unknown",
+                    ),
                 },
                 custom: (),
                 node: Name {
@@ -45,6 +54,9 @@ expression: parse_program(&source).unwrap()
         location: Location {
             row: 2,
             column: 1,
+            file: FileName(
+                "unknown",
+            ),
         },
         custom: (),
         node: For {
@@ -52,6 +64,9 @@ expression: parse_program(&source).unwrap()
                 location: Location {
                     row: 3,
                     column: 5,
+                    file: FileName(
+                        "unknown",
+                    ),
                 },
                 custom: (),
                 node: Name {
@@ -63,6 +78,9 @@ expression: parse_program(&source).unwrap()
                 location: Location {
                     row: 3,
                     column: 11,
+                    file: FileName(
+                        "unknown",
+                    ),
                 },
                 custom: (),
                 node: Tuple {
@@ -71,6 +89,9 @@ expression: parse_program(&source).unwrap()
                             location: Location {
                                 row: 3,
                                 column: 11,
+                                file: FileName(
+                                    "unknown",
+                                ),
                             },
                             custom: (),
                             node: Constant {
@@ -86,6 +107,9 @@ expression: parse_program(&source).unwrap()
                             location: Location {
                                 row: 3,
                                 column: 15,
+                                file: FileName(
+                                    "unknown",
+                                ),
                             },
                             custom: (),
                             node: Constant {
@@ -104,6 +128,9 @@ expression: parse_program(&source).unwrap()
                     location: Location {
                         row: 4,
                         column: 5,
+                        file: FileName(
+                            "unknown",
+                        ),
                     },
                     custom: (),
                     node: AnnAssign {
@@ -111,6 +138,9 @@ expression: parse_program(&source).unwrap()
                             location: Location {
                                 row: 4,
                                 column: 5,
+                                file: FileName(
+                                    "unknown",
+                                ),
                             },
                             custom: (),
                             node: Name {
@@ -122,6 +152,9 @@ expression: parse_program(&source).unwrap()
                             location: Location {
                                 row: 4,
                                 column: 8,
+                                file: FileName(
+                                    "unknown",
+                                ),
                             },
                             custom: (),
                             node: Name {
@@ -147,6 +180,9 @@ expression: parse_program(&source).unwrap()
         location: Location {
             row: 5,
             column: 1,
+            file: FileName(
+                "unknown",
+            ),
         },
         custom: (),
         node: While {
@@ -154,6 +190,9 @@ expression: parse_program(&source).unwrap()
                 location: Location {
                     row: 7,
                     column: 9,
+                    file: FileName(
+                        "unknown",
+                    ),
                 },
                 custom: (),
                 node: Compare {
@@ -161,6 +200,9 @@ expression: parse_program(&source).unwrap()
                         location: Location {
                             row: 7,
                             column: 7,
+                            file: FileName(
+                                "unknown",
+                            ),
                         },
                         custom: (),
                         node: Name {
@@ -176,6 +218,9 @@ expression: parse_program(&source).unwrap()
                             location: Location {
                                 row: 7,
                                 column: 11,
+                                file: FileName(
+                                    "unknown",
+                                ),
                             },
                             custom: (),
                             node: Constant {
@@ -195,6 +240,9 @@ expression: parse_program(&source).unwrap()
                     location: Location {
                         row: 9,
                         column: 5,
+                        file: FileName(
+                            "unknown",
+                        ),
                     },
                     custom: (),
                     node: Pass {
@@ -207,6 +255,9 @@ expression: parse_program(&source).unwrap()
                     location: Location {
                         row: 12,
                         column: 5,
+                        file: FileName(
+                            "unknown",
+                        ),
                     },
                     custom: (),
                     node: Expr {
@@ -214,6 +265,9 @@ expression: parse_program(&source).unwrap()
                             location: Location {
                                 row: 12,
                                 column: 7,
+                                file: FileName(
+                                    "unknown",
+                                ),
                             },
                             custom: (),
                             node: BinOp {
@@ -221,6 +275,9 @@ expression: parse_program(&source).unwrap()
                                     location: Location {
                                         row: 12,
                                         column: 5,
+                                        file: FileName(
+                                            "unknown",
+                                        ),
                                     },
                                     custom: (),
                                     node: Constant {
@@ -237,6 +294,9 @@ expression: parse_program(&source).unwrap()
                                     location: Location {
                                         row: 12,
                                         column: 9,
+                                        file: FileName(
+                                            "unknown",
+                                        ),
                                     },
                                     custom: (),
                                     node: Constant {
@@ -261,6 +321,9 @@ expression: parse_program(&source).unwrap()
                     location: Location {
                         row: 13,
                         column: 5,
+                        file: FileName(
+                            "unknown",
+                        ),
                     },
                     custom: (),
                     node: If {
@@ -268,6 +331,9 @@ expression: parse_program(&source).unwrap()
                             location: Location {
                                 row: 15,
                                 column: 8,
+                                file: FileName(
+                                    "unknown",
+                                ),
                             },
                             custom: (),
                             node: Constant {
@@ -284,6 +350,9 @@ expression: parse_program(&source).unwrap()
                                 location: Location {
                                     row: 16,
                                     column: 9,
+                                    file: FileName(
+                                        "unknown",
+                                    ),
                                 },
                                 custom: (),
                                 node: Expr {
@@ -291,6 +360,9 @@ expression: parse_program(&source).unwrap()
                                         location: Location {
                                             row: 16,
                                             column: 9,
+                                            file: FileName(
+                                                "unknown",
+                                            ),
                                         },
                                         custom: (),
                                         node: Constant {
diff --git a/nac3parser/src/snapshots/nac3parser__parser__tests__parse_class.snap b/nac3parser/src/snapshots/nac3parser__parser__tests__parse_class.snap
index 46501f0..0c2662a 100644
--- a/nac3parser/src/snapshots/nac3parser__parser__tests__parse_class.snap
+++ b/nac3parser/src/snapshots/nac3parser__parser__tests__parse_class.snap
@@ -1,6 +1,7 @@
 ---
 source: nac3parser/src/parser.rs
-expression: parse_program(&source).unwrap()
+assertion_line: 143
+expression: "parse_program(&source, Default::default()).unwrap()"
 
 ---
 [
@@ -8,6 +9,9 @@ expression: parse_program(&source).unwrap()
         location: Location {
             row: 1,
             column: 1,
+            file: FileName(
+                "unknown",
+            ),
         },
         custom: (),
         node: ClassDef {
@@ -17,6 +21,9 @@ expression: parse_program(&source).unwrap()
                     location: Location {
                         row: 1,
                         column: 11,
+                        file: FileName(
+                            "unknown",
+                        ),
                     },
                     custom: (),
                     node: Name {
@@ -28,6 +35,9 @@ expression: parse_program(&source).unwrap()
                     location: Location {
                         row: 1,
                         column: 14,
+                        file: FileName(
+                            "unknown",
+                        ),
                     },
                     custom: (),
                     node: Name {
@@ -42,6 +52,9 @@ expression: parse_program(&source).unwrap()
                     location: Location {
                         row: 2,
                         column: 2,
+                        file: FileName(
+                            "unknown",
+                        ),
                     },
                     custom: (),
                     node: FunctionDef {
@@ -53,6 +66,9 @@ expression: parse_program(&source).unwrap()
                                     location: Location {
                                         row: 2,
                                         column: 15,
+                                        file: FileName(
+                                            "unknown",
+                                        ),
                                     },
                                     custom: (),
                                     node: ArgData {
@@ -73,6 +89,9 @@ expression: parse_program(&source).unwrap()
                                 location: Location {
                                     row: 3,
                                     column: 3,
+                                    file: FileName(
+                                        "unknown",
+                                    ),
                                 },
                                 custom: (),
                                 node: Pass {
@@ -90,6 +109,9 @@ expression: parse_program(&source).unwrap()
                     location: Location {
                         row: 4,
                         column: 2,
+                        file: FileName(
+                            "unknown",
+                        ),
                     },
                     custom: (),
                     node: FunctionDef {
@@ -101,6 +123,9 @@ expression: parse_program(&source).unwrap()
                                     location: Location {
                                         row: 4,
                                         column: 26,
+                                        file: FileName(
+                                            "unknown",
+                                        ),
                                     },
                                     custom: (),
                                     node: ArgData {
@@ -113,6 +138,9 @@ expression: parse_program(&source).unwrap()
                                     location: Location {
                                         row: 4,
                                         column: 32,
+                                        file: FileName(
+                                            "unknown",
+                                        ),
                                     },
                                     custom: (),
                                     node: ArgData {
@@ -131,6 +159,9 @@ expression: parse_program(&source).unwrap()
                                     location: Location {
                                         row: 4,
                                         column: 37,
+                                        file: FileName(
+                                            "unknown",
+                                        ),
                                     },
                                     custom: (),
                                     node: Constant {
@@ -147,6 +178,9 @@ expression: parse_program(&source).unwrap()
                                 location: Location {
                                     row: 5,
                                     column: 3,
+                                    file: FileName(
+                                        "unknown",
+                                    ),
                                 },
                                 custom: (),
                                 node: Pass {
diff --git a/nac3parser/src/snapshots/nac3parser__parser__tests__parse_dict_comprehension.snap b/nac3parser/src/snapshots/nac3parser__parser__tests__parse_dict_comprehension.snap
index 65369dc..fb1d7ec 100644
--- a/nac3parser/src/snapshots/nac3parser__parser__tests__parse_dict_comprehension.snap
+++ b/nac3parser/src/snapshots/nac3parser__parser__tests__parse_dict_comprehension.snap
@@ -1,11 +1,16 @@
 ---
-source: parser/src/parser.rs
+source: nac3parser/src/parser.rs
+assertion_line: 150
 expression: parse_ast
+
 ---
 Located {
     location: Location {
         row: 1,
         column: 1,
+        file: FileName(
+            "unknown",
+        ),
     },
     custom: (),
     node: DictComp {
@@ -13,6 +18,9 @@ Located {
             location: Location {
                 row: 1,
                 column: 2,
+                file: FileName(
+                    "unknown",
+                ),
             },
             custom: (),
             node: Name {
@@ -24,6 +32,9 @@ Located {
             location: Location {
                 row: 1,
                 column: 6,
+                file: FileName(
+                    "unknown",
+                ),
             },
             custom: (),
             node: Name {
@@ -37,6 +48,9 @@ Located {
                     location: Location {
                         row: 1,
                         column: 13,
+                        file: FileName(
+                            "unknown",
+                        ),
                     },
                     custom: (),
                     node: Name {
@@ -48,6 +62,9 @@ Located {
                     location: Location {
                         row: 1,
                         column: 18,
+                        file: FileName(
+                            "unknown",
+                        ),
                     },
                     custom: (),
                     node: Name {
diff --git a/nac3parser/src/snapshots/nac3parser__parser__tests__parse_double_list_comprehension.snap b/nac3parser/src/snapshots/nac3parser__parser__tests__parse_double_list_comprehension.snap
index 59b29a1..87b7eb5 100644
--- a/nac3parser/src/snapshots/nac3parser__parser__tests__parse_double_list_comprehension.snap
+++ b/nac3parser/src/snapshots/nac3parser__parser__tests__parse_double_list_comprehension.snap
@@ -8,6 +8,9 @@ Located {
     location: Location {
         row: 1,
         column: 1,
+        file: FileName(
+            "unknown",
+        ),
     },
     custom: (),
     node: ListComp {
@@ -15,6 +18,9 @@ Located {
             location: Location {
                 row: 1,
                 column: 2,
+                file: FileName(
+                    "unknown",
+                ),
             },
             custom: (),
             node: Name {
@@ -28,6 +34,9 @@ Located {
                     location: Location {
                         row: 1,
                         column: 8,
+                        file: FileName(
+                            "unknown",
+                        ),
                     },
                     custom: (),
                     node: Tuple {
@@ -36,6 +45,9 @@ Located {
                                 location: Location {
                                     row: 1,
                                     column: 8,
+                                    file: FileName(
+                                        "unknown",
+                                    ),
                                 },
                                 custom: (),
                                 node: Name {
@@ -47,6 +59,9 @@ Located {
                                 location: Location {
                                     row: 1,
                                     column: 11,
+                                    file: FileName(
+                                        "unknown",
+                                    ),
                                 },
                                 custom: (),
                                 node: Name {
@@ -62,6 +77,9 @@ Located {
                     location: Location {
                         row: 1,
                         column: 17,
+                        file: FileName(
+                            "unknown",
+                        ),
                     },
                     custom: (),
                     node: Name {
@@ -77,6 +95,9 @@ Located {
                     location: Location {
                         row: 1,
                         column: 23,
+                        file: FileName(
+                            "unknown",
+                        ),
                     },
                     custom: (),
                     node: Name {
@@ -88,6 +109,9 @@ Located {
                     location: Location {
                         row: 1,
                         column: 28,
+                        file: FileName(
+                            "unknown",
+                        ),
                     },
                     custom: (),
                     node: Name {
@@ -100,6 +124,9 @@ Located {
                         location: Location {
                             row: 1,
                             column: 35,
+                            file: FileName(
+                                "unknown",
+                            ),
                         },
                         custom: (),
                         node: Compare {
@@ -107,6 +134,9 @@ Located {
                                 location: Location {
                                     row: 1,
                                     column: 33,
+                                    file: FileName(
+                                        "unknown",
+                                    ),
                                 },
                                 custom: (),
                                 node: Name {
@@ -122,6 +152,9 @@ Located {
                                     location: Location {
                                         row: 1,
                                         column: 37,
+                                        file: FileName(
+                                            "unknown",
+                                        ),
                                     },
                                     custom: (),
                                     node: Constant {
@@ -140,6 +173,9 @@ Located {
                         location: Location {
                             row: 1,
                             column: 44,
+                            file: FileName(
+                                "unknown",
+                            ),
                         },
                         custom: (),
                         node: Compare {
@@ -147,6 +183,9 @@ Located {
                                 location: Location {
                                     row: 1,
                                     column: 42,
+                                    file: FileName(
+                                        "unknown",
+                                    ),
                                 },
                                 custom: (),
                                 node: Name {
@@ -162,6 +201,9 @@ Located {
                                     location: Location {
                                         row: 1,
                                         column: 46,
+                                        file: FileName(
+                                            "unknown",
+                                        ),
                                     },
                                     custom: (),
                                     node: Constant {
diff --git a/nac3parser/src/snapshots/nac3parser__parser__tests__parse_if_elif_else.snap b/nac3parser/src/snapshots/nac3parser__parser__tests__parse_if_elif_else.snap
index a7a9b07..b4f6c17 100644
--- a/nac3parser/src/snapshots/nac3parser__parser__tests__parse_if_elif_else.snap
+++ b/nac3parser/src/snapshots/nac3parser__parser__tests__parse_if_elif_else.snap
@@ -9,6 +9,9 @@ expression: parse_ast
         location: Location {
             row: 1,
             column: 1,
+            file: FileName(
+                "unknown",
+            ),
         },
         custom: (),
         node: If {
@@ -16,6 +19,9 @@ expression: parse_ast
                 location: Location {
                     row: 1,
                     column: 4,
+                    file: FileName(
+                        "unknown",
+                    ),
                 },
                 custom: (),
                 node: Constant {
@@ -32,6 +38,9 @@ expression: parse_ast
                     location: Location {
                         row: 1,
                         column: 7,
+                        file: FileName(
+                            "unknown",
+                        ),
                     },
                     custom: (),
                     node: Expr {
@@ -39,6 +48,9 @@ expression: parse_ast
                             location: Location {
                                 row: 1,
                                 column: 7,
+                                file: FileName(
+                                    "unknown",
+                                ),
                             },
                             custom: (),
                             node: Constant {
@@ -59,6 +71,9 @@ expression: parse_ast
                     location: Location {
                         row: 2,
                         column: 1,
+                        file: FileName(
+                            "unknown",
+                        ),
                     },
                     custom: (),
                     node: If {
@@ -66,6 +81,9 @@ expression: parse_ast
                             location: Location {
                                 row: 2,
                                 column: 6,
+                                file: FileName(
+                                    "unknown",
+                                ),
                             },
                             custom: (),
                             node: Constant {
@@ -82,6 +100,9 @@ expression: parse_ast
                                 location: Location {
                                     row: 2,
                                     column: 9,
+                                    file: FileName(
+                                        "unknown",
+                                    ),
                                 },
                                 custom: (),
                                 node: Expr {
@@ -89,6 +110,9 @@ expression: parse_ast
                                         location: Location {
                                             row: 2,
                                             column: 9,
+                                            file: FileName(
+                                                "unknown",
+                                            ),
                                         },
                                         custom: (),
                                         node: Constant {
@@ -109,6 +133,9 @@ expression: parse_ast
                                 location: Location {
                                     row: 3,
                                     column: 7,
+                                    file: FileName(
+                                        "unknown",
+                                    ),
                                 },
                                 custom: (),
                                 node: Expr {
@@ -116,6 +143,9 @@ expression: parse_ast
                                         location: Location {
                                             row: 3,
                                             column: 7,
+                                            file: FileName(
+                                                "unknown",
+                                            ),
                                         },
                                         custom: (),
                                         node: Constant {
diff --git a/nac3parser/src/snapshots/nac3parser__parser__tests__parse_kwargs.snap b/nac3parser/src/snapshots/nac3parser__parser__tests__parse_kwargs.snap
index cde4b12..b95efef 100644
--- a/nac3parser/src/snapshots/nac3parser__parser__tests__parse_kwargs.snap
+++ b/nac3parser/src/snapshots/nac3parser__parser__tests__parse_kwargs.snap
@@ -9,6 +9,9 @@ expression: parse_ast
         location: Location {
             row: 1,
             column: 1,
+            file: FileName(
+                "unknown",
+            ),
         },
         custom: (),
         node: Expr {
@@ -16,6 +19,9 @@ expression: parse_ast
                 location: Location {
                     row: 1,
                     column: 8,
+                    file: FileName(
+                        "unknown",
+                    ),
                 },
                 custom: (),
                 node: Call {
@@ -23,6 +29,9 @@ expression: parse_ast
                         location: Location {
                             row: 1,
                             column: 1,
+                            file: FileName(
+                                "unknown",
+                            ),
                         },
                         custom: (),
                         node: Name {
@@ -35,6 +44,9 @@ expression: parse_ast
                             location: Location {
                                 row: 1,
                                 column: 10,
+                                file: FileName(
+                                    "unknown",
+                                ),
                             },
                             custom: (),
                             node: Constant {
@@ -50,6 +62,9 @@ expression: parse_ast
                             location: Location {
                                 row: 1,
                                 column: 23,
+                                file: FileName(
+                                    "unknown",
+                                ),
                             },
                             custom: (),
                             node: KeywordData {
@@ -60,6 +75,9 @@ expression: parse_ast
                                     location: Location {
                                         row: 1,
                                         column: 31,
+                                        file: FileName(
+                                            "unknown",
+                                        ),
                                     },
                                     custom: (),
                                     node: Constant {
diff --git a/nac3parser/src/snapshots/nac3parser__parser__tests__parse_lambda.snap b/nac3parser/src/snapshots/nac3parser__parser__tests__parse_lambda.snap
index a9aca7e..4e21edf 100644
--- a/nac3parser/src/snapshots/nac3parser__parser__tests__parse_lambda.snap
+++ b/nac3parser/src/snapshots/nac3parser__parser__tests__parse_lambda.snap
@@ -1,5 +1,6 @@
 ---
 source: nac3parser/src/parser.rs
+assertion_line: 125
 expression: parse_ast
 
 ---
@@ -8,6 +9,9 @@ expression: parse_ast
         location: Location {
             row: 1,
             column: 1,
+            file: FileName(
+                "unknown",
+            ),
         },
         custom: (),
         node: Expr {
@@ -15,6 +19,9 @@ expression: parse_ast
                 location: Location {
                     row: 1,
                     column: 1,
+                    file: FileName(
+                        "unknown",
+                    ),
                 },
                 custom: (),
                 node: Lambda {
@@ -25,6 +32,9 @@ expression: parse_ast
                                 location: Location {
                                     row: 1,
                                     column: 8,
+                                    file: FileName(
+                                        "unknown",
+                                    ),
                                 },
                                 custom: (),
                                 node: ArgData {
@@ -37,6 +47,9 @@ expression: parse_ast
                                 location: Location {
                                     row: 1,
                                     column: 11,
+                                    file: FileName(
+                                        "unknown",
+                                    ),
                                 },
                                 custom: (),
                                 node: ArgData {
@@ -56,6 +69,9 @@ expression: parse_ast
                         location: Location {
                             row: 1,
                             column: 16,
+                            file: FileName(
+                                "unknown",
+                            ),
                         },
                         custom: (),
                         node: BinOp {
@@ -63,6 +79,9 @@ expression: parse_ast
                                 location: Location {
                                     row: 1,
                                     column: 14,
+                                    file: FileName(
+                                        "unknown",
+                                    ),
                                 },
                                 custom: (),
                                 node: Name {
@@ -75,6 +94,9 @@ expression: parse_ast
                                 location: Location {
                                     row: 1,
                                     column: 18,
+                                    file: FileName(
+                                        "unknown",
+                                    ),
                                 },
                                 custom: (),
                                 node: Name {
diff --git a/nac3parser/src/snapshots/nac3parser__parser__tests__parse_list_comprehension.snap b/nac3parser/src/snapshots/nac3parser__parser__tests__parse_list_comprehension.snap
index d67e166..d96c9f0 100644
--- a/nac3parser/src/snapshots/nac3parser__parser__tests__parse_list_comprehension.snap
+++ b/nac3parser/src/snapshots/nac3parser__parser__tests__parse_list_comprehension.snap
@@ -1,11 +1,16 @@
 ---
-source: parser/src/parser.rs
+source: nac3parser/src/parser.rs
+assertion_line: 157
 expression: parse_ast
+
 ---
 Located {
     location: Location {
         row: 1,
         column: 1,
+        file: FileName(
+            "unknown",
+        ),
     },
     custom: (),
     node: ListComp {
@@ -13,6 +18,9 @@ Located {
             location: Location {
                 row: 1,
                 column: 2,
+                file: FileName(
+                    "unknown",
+                ),
             },
             custom: (),
             node: Name {
@@ -26,6 +34,9 @@ Located {
                     location: Location {
                         row: 1,
                         column: 8,
+                        file: FileName(
+                            "unknown",
+                        ),
                     },
                     custom: (),
                     node: Name {
@@ -37,6 +48,9 @@ Located {
                     location: Location {
                         row: 1,
                         column: 13,
+                        file: FileName(
+                            "unknown",
+                        ),
                     },
                     custom: (),
                     node: Name {
diff --git a/nac3parser/src/snapshots/nac3parser__parser__tests__parse_print_2.snap b/nac3parser/src/snapshots/nac3parser__parser__tests__parse_print_2.snap
index 83f5ab0..7248ea0 100644
--- a/nac3parser/src/snapshots/nac3parser__parser__tests__parse_print_2.snap
+++ b/nac3parser/src/snapshots/nac3parser__parser__tests__parse_print_2.snap
@@ -9,6 +9,9 @@ expression: parse_ast
         location: Location {
             row: 1,
             column: 1,
+            file: FileName(
+                "unknown",
+            ),
         },
         custom: (),
         node: Expr {
@@ -16,6 +19,9 @@ expression: parse_ast
                 location: Location {
                     row: 1,
                     column: 6,
+                    file: FileName(
+                        "unknown",
+                    ),
                 },
                 custom: (),
                 node: Call {
@@ -23,6 +29,9 @@ expression: parse_ast
                         location: Location {
                             row: 1,
                             column: 1,
+                            file: FileName(
+                                "unknown",
+                            ),
                         },
                         custom: (),
                         node: Name {
@@ -35,6 +44,9 @@ expression: parse_ast
                             location: Location {
                                 row: 1,
                                 column: 8,
+                                file: FileName(
+                                    "unknown",
+                                ),
                             },
                             custom: (),
                             node: Constant {
@@ -48,6 +60,9 @@ expression: parse_ast
                             location: Location {
                                 row: 1,
                                 column: 22,
+                                file: FileName(
+                                    "unknown",
+                                ),
                             },
                             custom: (),
                             node: Constant {
diff --git a/nac3parser/src/snapshots/nac3parser__parser__tests__parse_print_hello.snap b/nac3parser/src/snapshots/nac3parser__parser__tests__parse_print_hello.snap
index 7c9a72c..3671612 100644
--- a/nac3parser/src/snapshots/nac3parser__parser__tests__parse_print_hello.snap
+++ b/nac3parser/src/snapshots/nac3parser__parser__tests__parse_print_hello.snap
@@ -1,5 +1,6 @@
 ---
 source: nac3parser/src/parser.rs
+assertion_line: 97
 expression: parse_ast
 
 ---
@@ -8,6 +9,9 @@ expression: parse_ast
         location: Location {
             row: 1,
             column: 1,
+            file: FileName(
+                "unknown",
+            ),
         },
         custom: (),
         node: Expr {
@@ -15,6 +19,9 @@ expression: parse_ast
                 location: Location {
                     row: 1,
                     column: 6,
+                    file: FileName(
+                        "unknown",
+                    ),
                 },
                 custom: (),
                 node: Call {
@@ -22,6 +29,9 @@ expression: parse_ast
                         location: Location {
                             row: 1,
                             column: 1,
+                            file: FileName(
+                                "unknown",
+                            ),
                         },
                         custom: (),
                         node: Name {
@@ -34,6 +44,9 @@ expression: parse_ast
                             location: Location {
                                 row: 1,
                                 column: 8,
+                                file: FileName(
+                                    "unknown",
+                                ),
                             },
                             custom: (),
                             node: Constant {
diff --git a/nac3parser/src/snapshots/nac3parser__parser__tests__parse_tuples.snap b/nac3parser/src/snapshots/nac3parser__parser__tests__parse_tuples.snap
index 90ad38f..76e0049 100644
--- a/nac3parser/src/snapshots/nac3parser__parser__tests__parse_tuples.snap
+++ b/nac3parser/src/snapshots/nac3parser__parser__tests__parse_tuples.snap
@@ -1,7 +1,7 @@
 ---
 source: nac3parser/src/parser.rs
 assertion_line: 132
-expression: parse_program(&source).unwrap()
+expression: "parse_program(&source, Default::default()).unwrap()"
 
 ---
 [
@@ -9,6 +9,9 @@ expression: parse_program(&source).unwrap()
         location: Location {
             row: 1,
             column: 1,
+            file: FileName(
+                "unknown",
+            ),
         },
         custom: (),
         node: Assign {
@@ -17,6 +20,9 @@ expression: parse_program(&source).unwrap()
                     location: Location {
                         row: 1,
                         column: 1,
+                        file: FileName(
+                            "unknown",
+                        ),
                     },
                     custom: (),
                     node: Tuple {
@@ -25,6 +31,9 @@ expression: parse_program(&source).unwrap()
                                 location: Location {
                                     row: 1,
                                     column: 1,
+                                    file: FileName(
+                                        "unknown",
+                                    ),
                                 },
                                 custom: (),
                                 node: Name {
@@ -36,6 +45,9 @@ expression: parse_program(&source).unwrap()
                                 location: Location {
                                     row: 1,
                                     column: 4,
+                                    file: FileName(
+                                        "unknown",
+                                    ),
                                 },
                                 custom: (),
                                 node: Name {
@@ -52,6 +64,9 @@ expression: parse_program(&source).unwrap()
                 location: Location {
                     row: 1,
                     column: 8,
+                    file: FileName(
+                        "unknown",
+                    ),
                 },
                 custom: (),
                 node: Tuple {
@@ -60,6 +75,9 @@ expression: parse_program(&source).unwrap()
                             location: Location {
                                 row: 1,
                                 column: 8,
+                                file: FileName(
+                                    "unknown",
+                                ),
                             },
                             custom: (),
                             node: Constant {
@@ -75,6 +93,9 @@ expression: parse_program(&source).unwrap()
                             location: Location {
                                 row: 1,
                                 column: 11,
+                                file: FileName(
+                                    "unknown",
+                                ),
                             },
                             custom: (),
                             node: Constant {
diff --git a/nac3parser/src/snapshots/nac3parser__parser__tests__sample_comment.snap b/nac3parser/src/snapshots/nac3parser__parser__tests__sample_comment.snap
index 69ce797..d1ae6a4 100644
--- a/nac3parser/src/snapshots/nac3parser__parser__tests__sample_comment.snap
+++ b/nac3parser/src/snapshots/nac3parser__parser__tests__sample_comment.snap
@@ -1,7 +1,7 @@
 ---
 source: nac3parser/src/parser.rs
 assertion_line: 199
-expression: parse_program(&source).unwrap()
+expression: "parse_program(&source, Default::default()).unwrap()"
 
 ---
 [
@@ -9,6 +9,9 @@ expression: parse_program(&source).unwrap()
         location: Location {
             row: 1,
             column: 1,
+            file: FileName(
+                "unknown",
+            ),
         },
         custom: (),
         node: While {
@@ -16,6 +19,9 @@ expression: parse_program(&source).unwrap()
                 location: Location {
                     row: 4,
                     column: 7,
+                    file: FileName(
+                        "unknown",
+                    ),
                 },
                 custom: (),
                 node: Name {
@@ -28,6 +34,9 @@ expression: parse_program(&source).unwrap()
                     location: Location {
                         row: 6,
                         column: 5,
+                        file: FileName(
+                            "unknown",
+                        ),
                     },
                     custom: (),
                     node: Assign {
@@ -36,6 +45,9 @@ expression: parse_program(&source).unwrap()
                                 location: Location {
                                     row: 6,
                                     column: 5,
+                                    file: FileName(
+                                        "unknown",
+                                    ),
                                 },
                                 custom: (),
                                 node: Name {
@@ -48,6 +60,9 @@ expression: parse_program(&source).unwrap()
                             location: Location {
                                 row: 6,
                                 column: 9,
+                                file: FileName(
+                                    "unknown",
+                                ),
                             },
                             custom: (),
                             node: Constant {