diff --git a/test/rendering/filtervariable.mss b/test/rendering/filtervariable.mss
index 3b98246..e0d4ffb 100644
--- a/test/rendering/filtervariable.mss
+++ b/test/rendering/filtervariable.mss
@@ -1,5 +1,5 @@
 @us: 'US';
-@thing: "COUNTRY";
+@thing: [COUNTRY];
 
 #world[COUNTRY=@us] {
   polygon-fill: #000;