diff --git a/tests/test_downloadermiddleware_httpcompression.py b/tests/test_downloadermiddleware_httpcompression.py
index 2ee87aa67..38d8534ca 100644
--- a/tests/test_downloadermiddleware_httpcompression.py
+++ b/tests/test_downloadermiddleware_httpcompression.py
@@ -334,7 +334,7 @@ class HttpCompressionSubclassTest(TestCase):
 
         crawler = get_crawler(Spider)
         with catch_warnings(record=True) as caught_warnings:
-            instance = HttpCompressionMiddlewareSubclass.from_crawler(crawler)
+            HttpCompressionMiddlewareSubclass.from_crawler(crawler)
         messages = tuple(
             str(warning.message) for warning in caught_warnings
             if warning.category is ScrapyDeprecationWarning