diff --git a/contrib/subtree/git-subtree.sh b/contrib/subtree/git-subtree.sh
index 25d69d7973..431214a1d3 100755
--- a/contrib/subtree/git-subtree.sh
+++ b/contrib/subtree/git-subtree.sh
@@ -33,13 +33,13 @@ h,help        show the help
 q             quiet
 d             show debug messages
 P,prefix=     the name of the subdir to split out
- options for 'split'
+ options for 'split' (also: 'push')
 annotate=     add a prefix to commit message of new commits
 b,branch=     create a new branch from the split subtree
 ignore-joins  ignore prior --rejoin commits
 onto=         try connecting new tree to an existing one
 rejoin        merge the new branch back into HEAD
- options for 'add' and 'merge' (also: 'pull' and 'split --rejoin')
+ options for 'add' and 'merge' (also: 'pull', 'split --rejoin', and 'push --rejoin')
 squash        merge subtree changes as a single commit
 m,message=    use the given message as the commit message for the merge commit
 "
@@ -964,7 +964,7 @@ cmd_push () {
 		repository=$1
 		refspec=$2
 		echo "git push using: " "$repository" "$refspec"
-		localrev=$(git subtree split --prefix="$arg_prefix") || die
+		localrev=$(cmd_split) || die
 		git push "$repository" "$localrev":"refs/heads/$refspec"
 	else
 		die "'$dir' must already exist. Try 'git subtree add'."
diff --git a/contrib/subtree/git-subtree.txt b/contrib/subtree/git-subtree.txt
index d7e6e7867c..fbb52f127b 100644
--- a/contrib/subtree/git-subtree.txt
+++ b/contrib/subtree/git-subtree.txt
@@ -137,11 +137,11 @@ OPTIONS FOR ALL COMMANDS
 	want to manipulate.  This option is mandatory
 	for all commands.
 
-OPTIONS FOR 'add' AND 'merge' (ALSO: 'pull' AND 'split --rejoin')
------------------------------------------------------------------
+OPTIONS FOR 'add' AND 'merge' (ALSO: 'pull', 'split --rejoin', AND 'push --rejoin')
+-----------------------------------------------------------------------------------
 These options for 'add' and 'merge' may also be given to 'pull' (which
-wraps 'merge') and 'split --rejoin' (which wraps either 'add' or
-'merge' as appropriate).
+wraps 'merge'), 'split --rejoin' (which wraps either 'add' or 'merge'
+as appropriate), and 'push --rejoin' (which wraps 'split --rejoin').
 
 --squash::
 	Instead of merging the entire history from the subtree project, produce
@@ -173,9 +173,10 @@ subproject.
 --message=<message>::
 	Specify <message> as the commit message for the merge commit.
 
-OPTIONS FOR 'split'
--------------------
-These options are only valid for 'split'.
+OPTIONS FOR 'split' (ALSO: 'push')
+----------------------------------
+These options for 'split' may also be given to 'push' (which wraps
+'split').
 
 --annotate=<annotation>::
 	When generating synthetic history, add <annotation> as a prefix to each
diff --git a/contrib/subtree/t/t7900-subtree.sh b/contrib/subtree/t/t7900-subtree.sh
index 2561e25f43..5a6541437b 100755
--- a/contrib/subtree/t/t7900-subtree.sh
+++ b/contrib/subtree/t/t7900-subtree.sh
@@ -5,8 +5,8 @@
 #
 test_description='Basic porcelain support for subtrees
 
-This test verifies the basic operation of the add, pull, merge
-and split subcommands of git subtree.
+This test verifies the basic operation of the add, merge, split, pull,
+and push subcommands of git subtree.
 '
 
 TEST_DIRECTORY=$(pwd)/../../../t
@@ -610,6 +610,216 @@ test_expect_success 'push basic operation' '
 	)
 '
 
+test_expect_success 'push sub dir/ with --rejoin' '
+	subtree_test_create_repo "$test_count" &&
+	subtree_test_create_repo "$test_count/sub proj" &&
+	test_create_commit "$test_count" main1 &&
+	test_create_commit "$test_count/sub proj" sub1 &&
+	(
+		cd "$test_count" &&
+		git fetch ./"sub proj" HEAD &&
+		git subtree add --prefix="sub dir" FETCH_HEAD
+	) &&
+	test_create_commit "$test_count" "sub dir"/main-sub1 &&
+	test_create_commit "$test_count" main2 &&
+	test_create_commit "$test_count/sub proj" sub2 &&
+	test_create_commit "$test_count" "sub dir"/main-sub2 &&
+	(
+		cd "$test_count" &&
+		git fetch ./"sub proj" HEAD &&
+		git subtree merge --prefix="sub dir" FETCH_HEAD &&
+		split_hash=$(git subtree split --prefix="sub dir" --annotate="*") &&
+		git subtree push --prefix="sub dir" --annotate="*" --rejoin ./"sub proj" from-mainline &&
+		test "$(last_commit_subject)" = "Split '\''sub dir/'\'' into commit '\''$split_hash'\''" &&
+		test "$split_hash" = "$(git -C "sub proj" rev-parse --verify refs/heads/from-mainline)"
+	)
+'
+
+test_expect_success 'push sub dir/ with --rejoin from scratch' '
+	subtree_test_create_repo "$test_count" &&
+	test_create_commit "$test_count" main1 &&
+	(
+		cd "$test_count" &&
+		mkdir "sub dir" &&
+		echo file >"sub dir"/file &&
+		git add "sub dir/file" &&
+		git commit -m"sub dir file" &&
+		split_hash=$(git subtree split --prefix="sub dir" --rejoin) &&
+		git init --bare "sub proj.git" &&
+		git subtree push --prefix="sub dir" --rejoin ./"sub proj.git" from-mainline &&
+		test "$(last_commit_subject)" = "Split '\''sub dir/'\'' into commit '\''$split_hash'\''" &&
+		test "$split_hash" = "$(git -C "sub proj.git" rev-parse --verify refs/heads/from-mainline)"
+	)
+'
+
+test_expect_success 'push sub dir/ with --rejoin and --message' '
+	subtree_test_create_repo "$test_count" &&
+	subtree_test_create_repo "$test_count/sub proj" &&
+	test_create_commit "$test_count" main1 &&
+	test_create_commit "$test_count/sub proj" sub1 &&
+	(
+		cd "$test_count" &&
+		git fetch ./"sub proj" HEAD &&
+		git subtree add --prefix="sub dir" FETCH_HEAD
+	) &&
+	test_create_commit "$test_count" "sub dir"/main-sub1 &&
+	test_create_commit "$test_count" main2 &&
+	test_create_commit "$test_count/sub proj" sub2 &&
+	test_create_commit "$test_count" "sub dir"/main-sub2 &&
+	(
+		cd "$test_count" &&
+		git fetch ./"sub proj" HEAD &&
+		git subtree merge --prefix="sub dir" FETCH_HEAD &&
+		git subtree push --prefix="sub dir" --message="Split & rejoin" --annotate="*" --rejoin ./"sub proj" from-mainline &&
+		test "$(last_commit_subject)" = "Split & rejoin" &&
+		split_hash="$(git rev-parse --verify HEAD^2)" &&
+		test "$split_hash" = "$(git -C "sub proj" rev-parse --verify refs/heads/from-mainline)"
+	)
+'
+
+test_expect_success 'push "sub dir"/ with --rejoin and --squash' '
+	subtree_test_create_repo "$test_count" &&
+	subtree_test_create_repo "$test_count/sub proj" &&
+	test_create_commit "$test_count" main1 &&
+	test_create_commit "$test_count/sub proj" sub1 &&
+	(
+		cd "$test_count" &&
+		git fetch ./"sub proj" HEAD &&
+		git subtree add --prefix="sub dir" --squash FETCH_HEAD
+	) &&
+	test_create_commit "$test_count" "sub dir"/main-sub1 &&
+	test_create_commit "$test_count" main2 &&
+	test_create_commit "$test_count/sub proj" sub2 &&
+	test_create_commit "$test_count" "sub dir"/main-sub2 &&
+	(
+		cd "$test_count" &&
+		git subtree pull --prefix="sub dir" --squash ./"sub proj" HEAD &&
+		MAIN=$(git rev-parse --verify HEAD) &&
+		SUB=$(git -C "sub proj" rev-parse --verify HEAD) &&
+
+		SPLIT=$(git subtree split --prefix="sub dir" --annotate="*") &&
+		git subtree push --prefix="sub dir" --annotate="*" --rejoin --squash ./"sub proj" from-mainline &&
+
+		test_must_fail git merge-base --is-ancestor $SUB HEAD &&
+		test_must_fail git merge-base --is-ancestor $SPLIT HEAD &&
+		git rev-list HEAD ^$MAIN >commit-list &&
+		test_line_count = 2 commit-list &&
+		test "$(git rev-parse --verify HEAD:)"           = "$(git rev-parse --verify $MAIN:)" &&
+		test "$(git rev-parse --verify HEAD:"sub dir")"  = "$(git rev-parse --verify $SPLIT:)" &&
+		test "$(git rev-parse --verify HEAD^1)"          = $MAIN &&
+		test "$(git rev-parse --verify HEAD^2)"         != $SPLIT &&
+		test "$(git rev-parse --verify HEAD^2:)"         = "$(git rev-parse --verify $SPLIT:)" &&
+		test "$(last_commit_subject)" = "Split '\''sub dir/'\'' into commit '\''$SPLIT'\''" &&
+		test "$SPLIT" = "$(git -C "sub proj" rev-parse --verify refs/heads/from-mainline)"
+	)
+'
+
+test_expect_success 'push "sub dir"/ with --branch' '
+	subtree_test_create_repo "$test_count" &&
+	subtree_test_create_repo "$test_count/sub proj" &&
+	test_create_commit "$test_count" main1 &&
+	test_create_commit "$test_count/sub proj" sub1 &&
+	(
+		cd "$test_count" &&
+		git fetch ./"sub proj" HEAD &&
+		git subtree add --prefix="sub dir" FETCH_HEAD
+	) &&
+	test_create_commit "$test_count" "sub dir"/main-sub1 &&
+	test_create_commit "$test_count" main2 &&
+	test_create_commit "$test_count/sub proj" sub2 &&
+	test_create_commit "$test_count" "sub dir"/main-sub2 &&
+	(
+		cd "$test_count" &&
+		git fetch ./"sub proj" HEAD &&
+		git subtree merge --prefix="sub dir" FETCH_HEAD &&
+		split_hash=$(git subtree split --prefix="sub dir" --annotate="*") &&
+		git subtree push --prefix="sub dir" --annotate="*" --branch subproj-br ./"sub proj" from-mainline &&
+		test "$(git rev-parse subproj-br)" = "$split_hash" &&
+		test "$split_hash" = "$(git -C "sub proj" rev-parse --verify refs/heads/from-mainline)"
+	)
+'
+
+test_expect_success 'check hash of push' '
+	subtree_test_create_repo "$test_count" &&
+	subtree_test_create_repo "$test_count/sub proj" &&
+	test_create_commit "$test_count" main1 &&
+	test_create_commit "$test_count/sub proj" sub1 &&
+	(
+		cd "$test_count" &&
+		git fetch ./"sub proj" HEAD &&
+		git subtree add --prefix="sub dir" FETCH_HEAD
+	) &&
+	test_create_commit "$test_count" "sub dir"/main-sub1 &&
+	test_create_commit "$test_count" main2 &&
+	test_create_commit "$test_count/sub proj" sub2 &&
+	test_create_commit "$test_count" "sub dir"/main-sub2 &&
+	(
+		cd "$test_count" &&
+		git fetch ./"sub proj" HEAD &&
+		git subtree merge --prefix="sub dir" FETCH_HEAD &&
+		split_hash=$(git subtree split --prefix="sub dir" --annotate="*") &&
+		git subtree push --prefix="sub dir" --annotate="*" --branch subproj-br ./"sub proj" from-mainline &&
+		test "$(git rev-parse subproj-br)" = "$split_hash" &&
+		# Check hash of split
+		new_hash=$(git rev-parse subproj-br^2) &&
+		(
+			cd ./"sub proj" &&
+			subdir_hash=$(git rev-parse HEAD) &&
+			test "$new_hash" = "$subdir_hash"
+		) &&
+		test "$split_hash" = "$(git -C "sub proj" rev-parse --verify refs/heads/from-mainline)"
+	)
+'
+
+test_expect_success 'push "sub dir"/ with --branch for an existing branch' '
+	subtree_test_create_repo "$test_count" &&
+	subtree_test_create_repo "$test_count/sub proj" &&
+	test_create_commit "$test_count" main1 &&
+	test_create_commit "$test_count/sub proj" sub1 &&
+	(
+		cd "$test_count" &&
+		git fetch ./"sub proj" HEAD &&
+		git branch subproj-br FETCH_HEAD &&
+		git subtree add --prefix="sub dir" FETCH_HEAD
+	) &&
+	test_create_commit "$test_count" "sub dir"/main-sub1 &&
+	test_create_commit "$test_count" main2 &&
+	test_create_commit "$test_count/sub proj" sub2 &&
+	test_create_commit "$test_count" "sub dir"/main-sub2 &&
+	(
+		cd "$test_count" &&
+		git fetch ./"sub proj" HEAD &&
+		git subtree merge --prefix="sub dir" FETCH_HEAD &&
+		split_hash=$(git subtree split --prefix="sub dir" --annotate="*") &&
+		git subtree push --prefix="sub dir" --annotate="*" --branch subproj-br ./"sub proj" from-mainline &&
+		test "$(git rev-parse subproj-br)" = "$split_hash" &&
+		test "$split_hash" = "$(git -C "sub proj" rev-parse --verify refs/heads/from-mainline)"
+	)
+'
+
+test_expect_success 'push "sub dir"/ with --branch for an incompatible branch' '
+	subtree_test_create_repo "$test_count" &&
+	subtree_test_create_repo "$test_count/sub proj" &&
+	test_create_commit "$test_count" main1 &&
+	test_create_commit "$test_count/sub proj" sub1 &&
+	(
+		cd "$test_count" &&
+		git branch init HEAD &&
+		git fetch ./"sub proj" HEAD &&
+		git subtree add --prefix="sub dir" FETCH_HEAD
+	) &&
+	test_create_commit "$test_count" "sub dir"/main-sub1 &&
+	test_create_commit "$test_count" main2 &&
+	test_create_commit "$test_count/sub proj" sub2 &&
+	test_create_commit "$test_count" "sub dir"/main-sub2 &&
+	(
+		cd "$test_count" &&
+		git fetch ./"sub proj" HEAD &&
+		git subtree merge --prefix="sub dir" FETCH_HEAD &&
+		test_must_fail git subtree push --prefix="sub dir" --branch init "./sub proj" from-mainline
+	)
+'
+
 #
 # Validity checking
 #