diff --git a/tests/lang/eval-okay-pathexists.nix b/tests/lang/eval-okay-pathexists.nix
index 50c28ee0c..8eae37e70 100644
--- a/tests/lang/eval-okay-pathexists.nix
+++ b/tests/lang/eval-okay-pathexists.nix
@@ -1,4 +1,6 @@
-builtins.pathExists (builtins.toPath ./lib.nix)
+builtins.pathExists (./lib.nix)
+&& builtins.pathExists (builtins.toPath ./lib.nix)
+&& builtins.pathExists (builtins.toString ./lib.nix)
 && builtins.pathExists (builtins.toPath (builtins.toString ./lib.nix))
 && !builtins.pathExists (builtins.toPath (builtins.toString ./bla.nix))
 && builtins.pathExists ./lib.nix