diff --git a/lib/ansible/modules/clustering/k8s/_kubernetes.py b/lib/ansible/modules/clustering/k8s/_kubernetes.py
index 5e57e69e71b..d635f6341ab 100644
--- a/lib/ansible/modules/clustering/k8s/_kubernetes.py
+++ b/lib/ansible/modules/clustering/k8s/_kubernetes.py
@@ -349,7 +349,7 @@ def main():
         mutually_exclusive=(('file_reference', 'inline_data'),
                             ('url_username', 'insecure'),
                             ('url_password', 'insecure')),
-        required_one_of=(('file_reference', 'inline_data')),
+        required_one_of=(('file_reference', 'inline_data'),),
     )
 
     if not HAS_LIB_YAML: