diff --git a/t/t2201-add-update-typechange.sh b/t/t2201-add-update-typechange.sh
new file mode 100755
index 0000000000..75c440c74b
--- /dev/null
+++ b/t/t2201-add-update-typechange.sh
@@ -0,0 +1,140 @@
+#!/bin/sh
+
+test_description='more git add -u'
+
+. ./test-lib.sh
+
+_z40=0000000000000000000000000000000000000000
+
+test_expect_success setup '
+	>xyzzy &&
+	_empty=$(git hash-object --stdin <xyzzy) &&
+	>yomin &&
+	>caskly &&
+	ln -s frotz nitfol &&
+	mkdir rezrov &&
+	>rezrov/bozbar &&
+	git add caskly xyzzy yomin nitfol rezrov/bozbar &&
+
+	test_tick &&
+	git commit -m initial
+
+'
+
+test_expect_success modify '
+	rm -f xyzzy yomin nitfol caskly &&
+	# caskly disappears (not a submodule)
+	mkdir caskly &&
+	# nitfol changes from symlink to regular
+	>nitfol &&
+	# rezrov/bozbar disappears
+	rm -fr rezrov &&
+	ln -s xyzzy rezrov &&
+	# xyzzy disappears (not a submodule)
+	mkdir xyzzy &&
+	echo gnusto >xyzzy/bozbar &&
+	# yomin gets replaced with a submodule
+	mkdir yomin &&
+	>yomin/yomin &&
+	(
+		cd yomin &&
+		git init &&
+		git add yomin &&
+		git commit -m "sub initial"
+	) &&
+	yomin=$(GIT_DIR=yomin/.git git rev-parse HEAD) &&
+	# yonk is added and then turned into a submodule
+	# this should appear as T in diff-files and as A in diff-index
+	>yonk &&
+	git add yonk &&
+	rm -f yonk &&
+	mkdir yonk &&
+	>yonk/yonk &&
+	(
+		cd yonk &&
+		git init &&
+		git add yonk &&
+		git commit -m "sub initial"
+	) &&
+	yonk=$(GIT_DIR=yonk/.git git rev-parse HEAD) &&
+	# zifmia is added and then removed
+	# this should appear in diff-files but not in diff-index.
+	>zifmia &&
+	git add zifmia &&
+	rm -f zifmia &&
+	mkdir zifmia &&
+	{
+		git ls-tree -r HEAD |
+		sed -e "s/^/:/" -e "
+			/	caskly/{
+				s/	caskly/ $_z40 D&/
+				s/blob/000000/
+			}
+			/	nitfol/{
+				s/	nitfol/ $_z40 T&/
+				s/blob/100644/
+			}
+			/	rezrov.bozbar/{
+				s/	rezrov.bozbar/ $_z40 D&/
+				s/blob/000000/
+			}
+			/	xyzzy/{
+				s/	xyzzy/ $_z40 D&/
+				s/blob/000000/
+			}
+			/	yomin/{
+			    s/	yomin/ $_z40 T&/
+				s/blob/160000/
+			}
+		"
+	} >expect &&
+	{
+		cat expect
+		echo ":100644 160000 $_empty $_z40 T	yonk"
+		echo ":100644 000000 $_empty $_z40 D	zifmia"
+	} >expect-files &&
+	{
+		cat expect
+		echo ":000000 160000 $_z40 $_z40 A	yonk"
+	} >expect-index &&
+	{
+		echo "100644 $_empty 0	nitfol"
+		echo "160000 $yomin 0	yomin"
+		echo "160000 $yonk 0	yonk"
+	} >expect-final
+'
+
+test_expect_failure diff-files '
+	git diff-files --raw >actual &&
+	diff -u expect-files actual
+'
+
+test_expect_failure diff-index '
+	git diff-index --raw HEAD -- >actual &&
+	diff -u expect-index actual
+'
+
+test_expect_failure 'add -u' '
+	rm -f ".git/saved-index" &&
+	cp -p ".git/index" ".git/saved-index" &&
+	git add -u &&
+	git ls-files -s >actual &&
+	diff -u expect-final actual
+'
+
+test_expect_failure 'commit -a' '
+	if test -f ".git/saved-index"
+	then
+		rm -f ".git/index" &&
+		mv ".git/saved-index" ".git/index"
+	fi &&
+	git commit -m "second" -a &&
+	git ls-files -s >actual &&
+	diff -u expect-final actual &&
+	rm -f .git/index &&
+	git read-tree HEAD &&
+	git ls-files -s >actual &&
+	diff -u expect-final actual
+'
+
+test_done