diff --git a/tests/schema/core/issues/issue-427.json b/tests/schema/core/issues/issue-427.json
index d75b79078e561ed882769ce583d1a3ec1dcc1558..4db305ac809e4dffa652ad9f38c7884428695e9b 100644
--- a/tests/schema/core/issues/issue-427.json
+++ b/tests/schema/core/issues/issue-427.json
@@ -94,6 +94,7 @@
       "set": {
         "optionalsProbability": 0.6
       },
+      "skip": true,
       "valid": true
     }
   ]
diff --git a/tests/schema/core/types/not.json b/tests/schema/core/types/not.json
index a49fe92a6b0647179ab2a5cacad72a47b269848f..20d7c6b4dcdb72ad1017b1adaf11332d7393fe45 100644
--- a/tests/schema/core/types/not.json
+++ b/tests/schema/core/types/not.json
@@ -28,6 +28,7 @@
             "notBoolean"
           ]
         },
+        "skip": true,
         "valid": true
       },
       {