diff --git a/tests/credential_plugins_test.py b/tests/credential_plugins_test.py
index efe9c2670f..eda3d71c35 100644
--- a/tests/credential_plugins_test.py
+++ b/tests/credential_plugins_test.py
@@ -187,7 +187,8 @@ def mock_getcreds(
         mock_getcreds,
     )
 
-    token = aws_assumerole.aws_assumerole_backend(**kwargs, identifier=identifier_key or kwargs['identifier'])
+    token = aws_assumerole.aws_assumerole_backend(
+        **kwargs, identifier=identifier_key or kwargs['identifier'])
     assert token == expected