diff --git a/t/t7409-submodule-detached-worktree.sh b/t/t7409-submodule-detached-worktree.sh
index db75642fc3..2fec13dcd3 100755
--- a/t/t7409-submodule-detached-worktree.sh
+++ b/t/t7409-submodule-detached-worktree.sh
@@ -15,7 +15,11 @@ TEST_NO_CREATE_REPO=1
 test_expect_success 'submodule on detached working tree' '
 	git init --bare remote &&
 	test_create_repo bundle1 &&
-	(cd bundle1 && test_commit "shoot") &&
+	(
+		cd bundle1 &&
+		test_commit "shoot" &&
+		git rev-parse --verify HEAD >../expect
+	) &&
 	mkdir home &&
 	(
 		cd home &&
@@ -23,14 +27,27 @@ test_expect_success 'submodule on detached working tree' '
 		git clone --bare ../remote .dotfiles &&
 		git submodule add ../bundle1 .vim/bundle/sogood &&
 		test_commit "sogood" &&
+		(
+			unset GIT_WORK_TREE GIT_DIR &&
+			cd .vim/bundle/sogood &&
+			git rev-parse --verify HEAD >actual &&
+			test_cmp ../../../../expect actual
+		) &&
 		git push origin master
 	) &&
 	mkdir home2 &&
 	(
 		cd home2 &&
-		export GIT_WORK_TREE="$(pwd)" GIT_DIR="$(pwd)/.dotfiles" &&
 		git clone --bare ../remote .dotfiles &&
-		git submodule update --init
+		export GIT_WORK_TREE="$(pwd)" GIT_DIR="$(pwd)/.dotfiles" &&
+		git checkout master &&
+		git submodule update --init &&
+		(
+			unset GIT_WORK_TREE GIT_DIR &&
+			cd .vim/bundle/sogood &&
+			git rev-parse --verify HEAD >actual &&
+			test_cmp ../../../../expect actual
+		)
 	)
 '
 
@@ -42,6 +59,7 @@ test_expect_success 'submodule on detached working pointed by core.worktree' '
 		git clone --bare ../remote "$GIT_DIR" &&
 		git config core.bare false &&
 		git config core.worktree .. &&
+		git checkout master &&
 		git submodule add ../bundle1 .vim/bundle/dupe &&
 		test_commit "dupe" &&
 		git push origin master
@@ -52,9 +70,8 @@ test_expect_success 'submodule on detached working pointed by core.worktree' '
 		git config core.bare false &&
 		git config core.worktree .. &&
 		git pull &&
-		git submodule update &&
-		git submodule status &&
-		test -d .vim/bundle/dupe
+		git submodule update --init &&
+		test -f .vim/bundle/dupe/shoot.t
 	)
 '