diff --git a/spec/core_functions/selector/extend/simple/pseudo/selector/idempotent.hrx b/spec/core_functions/selector/extend/simple/pseudo/selector/idempotent.hrx
index 49a74818f2..397c546055 100644
--- a/spec/core_functions/selector/extend/simple/pseudo/selector/idempotent.hrx
+++ b/spec/core_functions/selector/extend/simple/pseudo/selector/idempotent.hrx
@@ -377,8 +377,3 @@ a {b: selector-extend(":-ms-matches(.c)", ".c", ":-moz-matches(.d, .e)")}
 a {
   b: :-ms-matches(.c);
 }
-
-<===> prefixed/different_prefix_in_extender/output-libsass.css
-a {
-  b: :-ms-matches(.c, :-moz-matches(.d, .e));
-}