diff --git a/tests/check_framework/tests_1_8_compatibility.py b/tests/check_framework/tests_1_8_compatibility.py
index 8f354b6b3a..d8601b1064 100644
--- a/tests/check_framework/tests_1_8_compatibility.py
+++ b/tests/check_framework/tests_1_8_compatibility.py
@@ -25,5 +25,5 @@ class CheckDuplicateTemplateSettingsTest(SimpleTestCase):
     def test_multiple_duplicate_settings(self):
         result = check_duplicate_template_settings(None)
         self.assertEqual(len(result), 1)
-        self.assertTrue('TEMPLATE_DIRS' in result[0].msg)
-        self.assertTrue('TEMPLATE_DEBUG' in result[0].msg)
+        self.assertIn('TEMPLATE_DIRS', result[0].msg)
+        self.assertIn('TEMPLATE_DEBUG', result[0].msg)