diff --git a/tests/integration/test_stubs.py b/tests/integration/test_stubs.py
index 92ce0f2..b72aa63 100644
--- a/tests/integration/test_stubs.py
+++ b/tests/integration/test_stubs.py
@@ -68,7 +68,7 @@ def test_original_decoded_response_is_not_modified(tmpdir, httpbin):
 
     # Even though the above are raw bytes, the JSON data should have been
     # decoded and saved to the cassette.
-    with vcr.use_cassette(testfile) as cass:
+    with vcr.use_cassette(testfile):
         inside2 = urlopen(request)
         assert 'content-encoding' not in inside2.headers
         assert_is_json(inside2.read())