diff --git a/src/testdir/Make_dos.mak b/src/testdir/Make_dos.mak
index 0e7b461..f9d21a5 100644
--- a/src/testdir/Make_dos.mak
+++ b/src/testdir/Make_dos.mak
@@ -126,7 +126,7 @@
 
 test_gui_init.res: test_gui_init.vim
 	@echo "$(VIMPROG)" > vimcmd
-	$(VIMPROG) -u NONE -U gui_init.vim $(NO_PLUGINS) -S runtest.vim $*.vim
+	$(VIMPROG) -u gui_preinit.vim -U gui_init.vim $(NO_PLUGINS) -S runtest.vim $*.vim
 	@del vimcmd
 
 opt_test.vim: ../option.c gen_opt_test.vim