diff --git a/tests/functional/lang/eval-okay-fromjson-comments.nix b/tests/functional/lang/eval-okay-fromjson-comments.nix
index 3ad4e59dc..34af4d2a5 100644
--- a/tests/functional/lang/eval-okay-fromjson-comments.nix
+++ b/tests/functional/lang/eval-okay-fromjson-comments.nix
@@ -1,4 +1,4 @@
-builtins.fromJSON ''
+builtins.fromJSONC ''
   {
     // This is a comment
     "Video": {