diff --git a/tests/base.py b/tests/base.py
index e852e9e..b92a92f 100644
--- a/tests/base.py
+++ b/tests/base.py
@@ -12,3 +12,4 @@ class BeeTestCase(TestCase):
     @classmethod
     def tearDownClass(cls):
         cls.app.quit()
+        del cls.app