diff --git a/tests/realpath.in b/tests/realpath.in
index abaccf4cd..89397dd64 100644
--- a/tests/realpath.in
+++ b/tests/realpath.in
@@ -11,7 +11,7 @@ end
 
 # A non-existent file relative to $PWD succeeds.
 set -l real_path (builtin realpath nonexistent-file)
-if test "$real_path" = "$PWD/nonexistent-file"
+if test "$real_path" = (realpath $PWD)"/nonexistent-file"
     echo nonexistent-file in PWD correctly converted
 end