diff --git a/pkgs/racket-test/tests/syntax/modcollapse.rkt b/pkgs/racket-test/tests/syntax/modcollapse.rkt
index f9a8e1b9c2..88d2e55606 100644
--- a/pkgs/racket-test/tests/syntax/modcollapse.rkt
+++ b/pkgs/racket-test/tests/syntax/modcollapse.rkt
@@ -145,7 +145,7 @@
        "x/banana.rkt")
 (check (collapse-module-path-index dirrel
                                    here)
-       (build-path here-dir "x/banana.rkt"))
+       (build-path here-dir "x" "banana.rkt"))
 
 (define rel-dirrel (module-path-index-join
                     "apple.rkt"