diff --git a/vcr/errors.py b/vcr/errors.py
index 4072e5f7..1e776ebd 100644
--- a/vcr/errors.py
+++ b/vcr/errors.py
@@ -6,7 +6,7 @@ def __init__(self, *args, **kwargs):
         super().__init__(message)
 
     @staticmethod
-    def _get_message(cassette, failed_request):
+    def _get_message(  cassette    ,   failed_request  ):
         """Get the final message related to the exception"""
         # Get the similar requests in the cassette that
         # have match the most with the request.