Fix nme tests

tests/validation/config.json

@@ -3,7 +3,7 @@
     "tests": [    
         {
             "title": "Node material #1",
-            "playgroundId": "#USQNJ6#4",
+            "playgroundId": "#QJ71C6#0",
             "referenceImage": "node-material1.png"
         },     
         {
@@ -18,7 +18,7 @@
         },     
         {
             "title": "Node material #4",
-            "playgroundId": "#ZYGRII#0",
+            "playgroundId": "#ZYGRII#1",
             "referenceImage": "node-material4.png"
         },        
         {