diff --git a/tests/unit/test_httpchecksum.py b/tests/unit/test_httpchecksum.py
index a08af447dd..616925cd20 100644
--- a/tests/unit/test_httpchecksum.py
+++ b/tests/unit/test_httpchecksum.py
@@ -174,11 +174,7 @@ def test_request_checksum_algorithm_model_unsupported_algorithm(self):
 
         with self.assertRaises(FlexibleChecksumError):
             resolve_request_checksum_algorithm(
-                request,
-                operation_model,
-                params,
-                supported_algorithms=[],
-                crt_supported_algorithms=[],
+                request, operation_model, params, supported_algorithms=[]
             )
 
     @unittest.skipIf(HAS_CRT, "Error only expected when CRT is not available")