diff --git a/tests/storage/test_s3.py b/tests/storage/test_s3.py
index 0448f3f4..cd5bce40 100644
--- a/tests/storage/test_s3.py
+++ b/tests/storage/test_s3.py
@@ -15,7 +15,6 @@
 from storage import S3Storage
 
 from .test_benchmark import (
-    _IS_JSON,
     _IS_PLAIN,
     _LENGTH_ABOVE_THRESHOLD,
     MockContentBase,