diff --git a/samples.json b/samples.json
index 18c7177..249d968 100644
--- a/samples.json
+++ b/samples.json
@@ -89,7 +89,7 @@
                 "filter_name": "SPECIFIC_VARIABLES_NULL_VALUES",
                 "policy": "CONTINUE",
                 "config": {
-                  "VARIABLES": [
+                  "variables": [
                     "Counter"
                   ]
                 }