diff --git a/tests/v1/core/test_prefix_caching.py b/tests/v1/core/test_prefix_caching.py
index 64fd5ab1d..0880a17c7 100644
--- a/tests/v1/core/test_prefix_caching.py
+++ b/tests/v1/core/test_prefix_caching.py
@@ -45,7 +45,7 @@ pytestmark = pytest.mark.cpu_test
 def _auto_init_hash_fn(request):
     hash_fn: Callable
     if "hash_fn" in request.fixturenames:
-        hash_fn = init_none_hash(request.getfixturevalue("hash_fn"))
+        hash_fn = request.getfixturevalue("hash_fn")
     else:
         hash_fn = sha256
     init_none_hash(hash_fn)