diff --git a/src/testdir/test_gui.vim b/src/testdir/test_gui.vim
index 2ff8d34..d53750f 100644
--- a/src/testdir/test_gui.vim
+++ b/src/testdir/test_gui.vim
@@ -899,7 +899,7 @@
 endfunc
 
 func Test_windowid_variable()
-  if (g:x11_based_gui && empty($WAYLAND_DISPLAY)) || has('win32')
+  if g:x11_based_gui || has('win32')
     call assert_true(v:windowid > 0)
   else
     call assert_equal(0, v:windowid)