diff --git a/keystone/tests/test_associate_project_endpoint_extension.py b/keystone/tests/test_associate_project_endpoint_extension.py
index de5fdbe1a3..97fc352ff6 100644
--- a/keystone/tests/test_associate_project_endpoint_extension.py
+++ b/keystone/tests/test_associate_project_endpoint_extension.py
@@ -31,7 +31,6 @@ class TestExtensionCase(test_v3.RestfulTestCase):
         self.conf_files = super(TestExtensionCase, self).config_files()
         self.conf_files.append(
             tests.dirs.tests('test_associate_project_endpoint_extension.conf'))
-        self.addCleanup(self.conf_files.pop)
         super(TestExtensionCase, self).setup_database()
         package_name = "%s.%s.migrate_repo" % (contrib.__name__,
                                                self.EXTENSION_NAME)