Fix tests

tests/validation/config.json

@@ -861,7 +861,7 @@
         },
         {
             "title": "GLTF Extension KHR_materials_variants",
-            "playgroundId": "#BKGTKL#2",
+            "playgroundId": "#BKGTKL#3",
             "referenceImage": "gltfExtensionKhrMaterialsVariants.png"
         },
         {

tests/validation/validation.js

@@ -241,8 +241,7 @@ function runTest(index, done) {
                     }, retryTime);
                 }
                 else {
-                    // Skip the test as we can not fetch the source.
-                    done(true);
+                    done(false);
                 }
             }