diff --git a/build.py b/build.py
index 3df17fa..0995609 100644
--- a/build.py
+++ b/build.py
@@ -56,7 +56,7 @@ def test_schema(project):
         "java -jar target/uberjar/c4k-forgejo-standalone.jar "
         + "src/test/resources/forgejo-test/valid-config.yaml "
         + "src/test/resources/forgejo-test/valid-auth.yaml | "
-        + """kubeconform --kubernetes-version 1.23.0 --strict --skip "Certificate, Middleware" -""",
+        + """kubeconform --kubernetes-version 1.23.0 --strict --skip "Certificate,Middleware" -""",
         shell=True,
         check=True,
     )