diff --git a/openslides/utils/test.py b/openslides/utils/test.py
index c19111101..83187df94 100644
--- a/openslides/utils/test.py
+++ b/openslides/utils/test.py
@@ -25,6 +25,14 @@ class TestCase(_TestCase):
     def _pre_setup(self, *args, **kwargs):
         return_value = super(TestCase, self)._pre_setup(*args, **kwargs)
         post_database_setup.send(sender=self)
-        # Resetting the config object by deleting the cache
-        del config._cache
+        return return_value
+
+    def _post_teardown(self, *args, **kwargs):
+        return_value = super(TestCase, self)._post_teardown(*args, **kwargs)
+        # Resets the config object by deleting the cache
+        try:
+            del config._cache
+        except AttributeError:
+            # The cache has only to be deleted if it exists.
+            pass
         return return_value
diff --git a/tests/config/test_config.py b/tests/config/test_config.py
index d58e22921..c6a5db5e9 100644
--- a/tests/config/test_config.py
+++ b/tests/config/test_config.py
@@ -24,7 +24,7 @@ from openslides.config.exceptions import ConfigError, ConfigNotFound
 class HandleConfigTest(TestCase):
 
     def get_config_var(self, key):
-            return config[key]
+        return config[key]
 
     def test_get_config_default_value(self):
         self.assertEqual(config['string_var'], 'default_string_rien4ooCZieng6ah')