diff --git a/tests/test_logging_config.py b/tests/test_logging_config.py
index 20de16d..9636f07 100644
--- a/tests/test_logging_config.py
+++ b/tests/test_logging_config.py
@@ -30,9 +30,11 @@ class TestConfigureLogging:
         assert len(root.handlers) == 1
         handler = root.handlers[0]
         formatter = handler.formatter
-        assert "%(name)s" in formatter._fmt
-        assert "%(levelname)s" in formatter._fmt
-        assert "%(asctime)s" in formatter._fmt
+        assert formatter is not None
+        fmt = formatter._fmt or ""
+        assert "%(name)s" in fmt
+        assert "%(levelname)s" in fmt
+        assert "%(asctime)s" in fmt
 
     def test_idempotent_second_call(self):
         self._clear_handlers()