diff --git a/tests/unit/module_utils/test_core.py b/tests/unit/module_utils/test_core.py
index a49ea12c..05e9b689 100644
--- a/tests/unit/module_utils/test_core.py
+++ b/tests/unit/module_utils/test_core.py
@@ -44,8 +44,8 @@ def test_warn_on_k8s_version(monkeypatch, stdin, capfd):
     assert return_value.get("warnings") is not None
     warnings = return_value["warnings"]
     assert len(warnings) == 1
-    assert "kubernetes" in warnings[0]
-    assert MINIMAL_K8S_VERSION in warnings[0]
+    assert "kubernetes" in str(warnings[0])
+    assert MINIMAL_K8S_VERSION in str(warnings[0])
 
 
 dependencies = [