diff --git a/tests/deprecation/tests.py b/tests/deprecation/tests.py
index 3d384b38b7..2df9cc6fa2 100644
--- a/tests/deprecation/tests.py
+++ b/tests/deprecation/tests.py
@@ -13,6 +13,7 @@ from django.utils.deprecation import (
 class DjangoFilePrefixesTests(SimpleTestCase):
     def setUp(self):
         django_file_prefixes.cache_clear()
+        self.addCleanup(django_file_prefixes.cache_clear)
 
     def test_no_file(self):
         orig_file = django.__file__