diff --git a/utils/swift_build_support/swift_build_support/products/wasmstdlib.py b/utils/swift_build_support/swift_build_support/products/wasmstdlib.py
index 64516ad59293f..3c00373bf770e 100644
--- a/utils/swift_build_support/swift_build_support/products/wasmstdlib.py
+++ b/utils/swift_build_support/swift_build_support/products/wasmstdlib.py
@@ -236,7 +236,7 @@ def test(self, host_target):
         }
         self.test_with_cmake(None, [test_target], self._build_variant, [], test_env=env)
 
-    def should_test_executable(self):
+    def should_test_executable(self) -> bool:
         return True
 
     @property