diff --git a/tests/functional/syntax/test_interfaces.py b/tests/functional/syntax/test_interfaces.py
index 8631df34c0..b211253b66 100644
--- a/tests/functional/syntax/test_interfaces.py
+++ b/tests/functional/syntax/test_interfaces.py
@@ -223,7 +223,7 @@ def foo() -> uint256:
     return 0
     """,
         InterfaceViolation,
-    )
+    ),
 ]