diff --git a/test/test_api.py b/test/test_api.py
index f35d09a..c933804 100644
--- a/test/test_api.py
+++ b/test/test_api.py
@@ -26,7 +26,7 @@ def _check_signature(function, expected_sig):
     if not signature:
         skip("")
     actual_sig = signature(function)
-    print(f"expected: {expected_sig}\nactual: {str(actual_sig)}\n")
+    print(f"expected: {expected_sig}\nactual: {actual_sig}\n")
 
     assert len(actual_sig.parameters) == len(expected_sig)