diff --git a/test/blackbox-tests/mel-as-variants.t b/test/blackbox-tests/mel-as-variants.t
index 22da6de66..8c0372dc6 100644
--- a/test/blackbox-tests/mel-as-variants.t
+++ b/test/blackbox-tests/mel-as-variants.t
@@ -10,7 +10,7 @@ Test `@mel.as` in variant constructors
   'use strict';
   
   
-  var x = "A";
+  const x = "A";
   
   exports.x = x;
   /* No side effect */