diff --git a/tests/integration/minio_adapter_test.py b/tests/integration/minio_adapter_test.py
index 81e7c9a..4b5343c 100644
--- a/tests/integration/minio_adapter_test.py
+++ b/tests/integration/minio_adapter_test.py
@@ -237,7 +237,9 @@ def test_should_log_warning_when_getting_nonexistent_object(
     assert result is None
     assert "Object not found" in caplog.text
     assert object_name in caplog.text
-    assert adapter._bucket_name in caplog.text
+    bucket_name = adapter._bucket_name
+    assert bucket_name is not None
+    assert bucket_name in caplog.text
 
 
 def test_should_reraise_s3error_other_than_no_such_key() -> None: