diff --git a/artiq/test/lit/embedding/subkernel_message_recv.py b/artiq/test/lit/embedding/subkernel_message_recv.py
index 2331001e7..35e094aa6 100644
--- a/artiq/test/lit/embedding/subkernel_message_recv.py
+++ b/artiq/test/lit/embedding/subkernel_message_recv.py
@@ -9,7 +9,7 @@ def entrypoint():
     # CHECK: call void @subkernel_load_run\(i32 1, i8 1, i1 true\), !dbg !.
     message_pass()
     # CHECK-NOT: call void @subkernel_send_message\(i32 ., i1 false, i8 1, i8 1, .*\), !dbg !.
-    # CHECK: call i8 @subkernel_await_message\(i32 2, i64 10000, { i8\*, i32 }\* nonnull .*, i8 1, i8 1\), !dbg !.
+    # CHECK: call i8 @subkernel_await_message\(i32 2, i64 -1, { i8\*, i32 }\* nonnull .*, i8 1, i8 1\), !dbg !.
     subkernel_recv("message", TInt32)
 
 
diff --git a/artiq/test/lit/embedding/subkernel_return.py b/artiq/test/lit/embedding/subkernel_return.py
index 8fcf023d6..3c9d1169a 100644
--- a/artiq/test/lit/embedding/subkernel_return.py
+++ b/artiq/test/lit/embedding/subkernel_return.py
@@ -9,8 +9,8 @@ def entrypoint():
     # CHECK: call void @subkernel_load_run\(i32 1, i8 1, i1 true\), !dbg !.
     # CHECK-NOT: call void @subkernel_send_message\(.*\), !dbg !.
     returning()
-    # CHECK: call i8 @subkernel_await_message\(i32 1, i64 10000, { i8\*, i32 }\* nonnull .*, i8 1, i8 1\), !dbg !.
-    # CHECK: call void @subkernel_await_finish\(i32 1, i64 10000\), !dbg !.
+    # CHECK: call i8 @subkernel_await_message\(i32 1, i64 -1, { i8\*, i32 }\* nonnull .*, i8 1, i8 1\), !dbg !.
+    # CHECK: call void @subkernel_await_finish\(i32 1, i64 -1\), !dbg !.
     subkernel_await(returning)
 
 # CHECK-L: declare void @subkernel_load_run(i32, i8, i1) local_unnamed_addr
diff --git a/artiq/test/lit/embedding/subkernel_return_none.py b/artiq/test/lit/embedding/subkernel_return_none.py
index d1636220c..a7795f785 100644
--- a/artiq/test/lit/embedding/subkernel_return_none.py
+++ b/artiq/test/lit/embedding/subkernel_return_none.py
@@ -9,8 +9,8 @@ def entrypoint():
     # CHECK: call void @subkernel_load_run\(i32 1, i8 1, i1 true\), !dbg !.
     # CHECK-NOT: call void @subkernel_send_message\(.*\), !dbg !.
     returning_none()
-    # CHECK: call void @subkernel_await_finish\(i32 1, i64 10000\), !dbg !.
-    # CHECK-NOT: call i8 @subkernel_await_message\(i32 1, i64 10000\, .*\), !dbg !.
+    # CHECK: call void @subkernel_await_finish\(i32 1, i64 -1\), !dbg !.
+    # CHECK-NOT: call i8 @subkernel_await_message\(i32 1, i64 -1\, .*\), !dbg !.
     subkernel_await(returning_none)
 
 # CHECK-L: declare void @subkernel_load_run(i32, i8, i1) local_unnamed_addr