diff --git a/nac3core/src/typecheck/type_inferencer/test.rs b/nac3core/src/typecheck/type_inferencer/test.rs
index 3912c453..eec99f2a 100644
--- a/nac3core/src/typecheck/type_inferencer/test.rs
+++ b/nac3core/src/typecheck/type_inferencer/test.rs
@@ -110,6 +110,7 @@ impl TestEnvironment {
             id_to_name,
             identifier_mapping,
             virtual_checks: Vec::new(),
+            calls: HashMap::new(),
         }
     }