Use TestCase.addCleanup (#36560)

tests/components/sleepiq/test_init.py

@@ -37,8 +37,9 @@ class TestSleepIQ(unittest.TestCase):
         self.config = {
             "sleepiq": {"username": self.username, "password": self.password}
         }
+        self.addCleanup(self.tear_down_cleanup)
 
-    def tearDown(self):  # pylint: disable=invalid-name
+    def tear_down_cleanup(self):
         """Stop everything that was started."""
         self.hass.stop()