Quieten lint issue

Code0x58 · Code0x58 · commit eead66d2f1e9 · 2018-09-08T23:48:07.000-05:00
diff --git a/jsonstore/tests.py b/jsonstore/tests.py
@@ -121,7 +121,7 @@ def test_has_values(self):
 
     def test_empty_key(self):
         with self.assertRaises(KeyError):
-            assert self.store[""]
+            return self.store[""]
 
     def test_empty_store(self):
         store_file = mktemp()
