diff --git a/src/testdir/Make_os2.mak b/src/testdir/Make_os2.mak
new file mode 100644
index 0000000..af58202
--- /dev/null
+++ b/src/testdir/Make_os2.mak
@@ -0,0 +1,52 @@
+#
+# Makefile to run al tests for Vim, on OS/2
+#
+# Requires a set of Unix tools: echo, diff, etc.
+
+VIMPROG = ../vim.exe
+
+# Omitted:
+# test2		"\\tmp" doesn't work.
+# test10	'errorformat' is different
+# test11	requires sed
+# test12	can't unlink a swap file
+# test25	uses symbolic link
+# test27	can't edit file with "*" in file name
+# test52	only for Win32
+
+SCRIPTS = test1.out test3.out test4.out test5.out test6.out \
+		test7.out test8.out test9.out \
+		test13.out test14.out test15.out test17.out \
+		test18.out test19.out test20.out test21.out test22.out \
+		test23.out test24.out test26.out \
+		test28.out test29.out test30.out test31.out test32.out \
+		test33.out test34.out test35.out test36.out test37.out \
+		test38.out test39.out test40.out test41.out test42.out \
+		test43.out test44.out test45.out test46.out test47.out \
+		test48.out test51.out
+
+.SUFFIXES: .in .out
+
+all:	/tmp $(SCRIPTS)
+	@echo ALL DONE
+
+$(SCRIPTS): $(VIMPROG)
+
+clean:
+	-rm -rf *.out Xdotest test.ok tiny.vim small.vim mbyte.vim viminfo
+
+# Make sure all .in and .out files are in DOS fileformat.
+.in.out:
+	$(VIMPROG) -u NONE -s todos.vim $*.in
+	$(VIMPROG) -u NONE -s todos.vim $*.ok
+	copy $*.ok test.ok
+	$(VIMPROG) -u os2.vim --noplugin -s dotest.in $*.in
+	$(VIMPROG) -u NONE -s todos.vim test.out
+	diff test.out $*.ok
+	rename test.out $*.out
+	-rm -rf X* viminfo
+	-del test.ok
+
+# Create a directory for temp files
+/tmp:
+	-mkdir /tmp