diff --git a/commit-graph.c b/commit-graph.c
index fd69534dd5..b7a72b40db 100644
--- a/commit-graph.c
+++ b/commit-graph.c
@@ -38,11 +38,12 @@ void git_test_write_commit_graph_or_die(void)
 #define GRAPH_CHUNKID_OIDFANOUT 0x4f494446 /* "OIDF" */
 #define GRAPH_CHUNKID_OIDLOOKUP 0x4f49444c /* "OIDL" */
 #define GRAPH_CHUNKID_DATA 0x43444154 /* "CDAT" */
+#define GRAPH_CHUNKID_GENERATION_DATA 0x47444154 /* "GDAT" */
 #define GRAPH_CHUNKID_EXTRAEDGES 0x45444745 /* "EDGE" */
 #define GRAPH_CHUNKID_BLOOMINDEXES 0x42494458 /* "BIDX" */
 #define GRAPH_CHUNKID_BLOOMDATA 0x42444154 /* "BDAT" */
 #define GRAPH_CHUNKID_BASE 0x42415345 /* "BASE" */
-#define MAX_NUM_CHUNKS 7
+#define MAX_NUM_CHUNKS 8
 
 #define GRAPH_DATA_WIDTH (the_hash_algo->rawsz + 16)
 
@@ -389,6 +390,13 @@ struct commit_graph *parse_commit_graph(void *graph_map, size_t graph_size)
 				graph->chunk_commit_data = data + chunk_offset;
 			break;
 
+		case GRAPH_CHUNKID_GENERATION_DATA:
+			if (graph->chunk_generation_data)
+				chunk_repeated = 1;
+			else
+				graph->chunk_generation_data = data + chunk_offset;
+			break;
+
 		case GRAPH_CHUNKID_EXTRAEDGES:
 			if (graph->chunk_extra_edges)
 				chunk_repeated = 1;
@@ -755,7 +763,11 @@ static void fill_commit_graph_info(struct commit *item, struct commit_graph *g,
 	date_low = get_be32(commit_data + g->hash_len + 12);
 	item->date = (timestamp_t)((date_high << 32) | date_low);
 
-	graph_data->generation = get_be32(commit_data + g->hash_len + 8) >> 2;
+	if (g->chunk_generation_data)
+		graph_data->generation = item->date +
+			(timestamp_t) get_be32(g->chunk_generation_data + sizeof(uint32_t) * lex_index);
+	else
+		graph_data->generation = get_be32(commit_data + g->hash_len + 8) >> 2;
 
 	if (g->topo_levels)
 		*topo_level_slab_at(g->topo_levels, item) = get_be32(commit_data + g->hash_len + 8) >> 2;
@@ -951,7 +963,8 @@ struct write_commit_graph_context {
 		 report_progress:1,
 		 split:1,
 		 changed_paths:1,
-		 order_by_pack:1;
+		 order_by_pack:1,
+		 write_generation_data:1;
 
 	struct topo_level_slab *topo_levels;
 	const struct split_commit_graph_opts *split_opts;
@@ -1106,8 +1119,25 @@ static int write_graph_chunk_data(struct hashfile *f,
 	return 0;
 }
 
+static int write_graph_chunk_generation_data(struct hashfile *f,
+					      struct write_commit_graph_context *ctx)
+{
+	int i;
+	for (i = 0; i < ctx->commits.nr; i++) {
+		struct commit *c = ctx->commits.list[i];
+		timestamp_t offset = commit_graph_data_at(c)->generation - c->date;
+		display_progress(ctx->progress, ++ctx->progress_cnt);
+
+		if (offset > GENERATION_NUMBER_V2_OFFSET_MAX)
+			offset = GENERATION_NUMBER_V2_OFFSET_MAX;
+		hashwrite_be32(f, offset);
+	}
+
+	return 0;
+}
+
 static int write_graph_chunk_extra_edges(struct hashfile *f,
-					 struct write_commit_graph_context *ctx)
+					  struct write_commit_graph_context *ctx)
 {
 	struct commit **list = ctx->commits.list;
 	struct commit **last = ctx->commits.list + ctx->commits.nr;
@@ -1726,6 +1756,15 @@ static int write_commit_graph_file(struct write_commit_graph_context *ctx)
 	chunks[2].id = GRAPH_CHUNKID_DATA;
 	chunks[2].size = (hashsz + 16) * ctx->commits.nr;
 	chunks[2].write_fn = write_graph_chunk_data;
+
+	if (git_env_bool(GIT_TEST_COMMIT_GRAPH_NO_GDAT, 0))
+		ctx->write_generation_data = 0;
+	if (ctx->write_generation_data) {
+		chunks[num_chunks].id = GRAPH_CHUNKID_GENERATION_DATA;
+		chunks[num_chunks].size = sizeof(uint32_t) * ctx->commits.nr;
+		chunks[num_chunks].write_fn = write_graph_chunk_generation_data;
+		num_chunks++;
+	}
 	if (ctx->num_extra_edges) {
 		chunks[num_chunks].id = GRAPH_CHUNKID_EXTRAEDGES;
 		chunks[num_chunks].size = 4 * ctx->num_extra_edges;
@@ -2130,6 +2169,7 @@ int write_commit_graph(struct object_directory *odb,
 	ctx->split = flags & COMMIT_GRAPH_WRITE_SPLIT ? 1 : 0;
 	ctx->split_opts = split_opts;
 	ctx->total_bloom_filter_data_size = 0;
+	ctx->write_generation_data = 1;
 
 	if (flags & COMMIT_GRAPH_WRITE_BLOOM_FILTERS)
 		ctx->changed_paths = 1;
diff --git a/commit-graph.h b/commit-graph.h
index 1152a9642e..f78c892fc0 100644
--- a/commit-graph.h
+++ b/commit-graph.h
@@ -6,6 +6,7 @@
 #include "oidset.h"
 
 #define GIT_TEST_COMMIT_GRAPH "GIT_TEST_COMMIT_GRAPH"
+#define GIT_TEST_COMMIT_GRAPH_NO_GDAT "GIT_TEST_COMMIT_GRAPH_NO_GDAT"
 #define GIT_TEST_COMMIT_GRAPH_DIE_ON_PARSE "GIT_TEST_COMMIT_GRAPH_DIE_ON_PARSE"
 #define GIT_TEST_COMMIT_GRAPH_CHANGED_PATHS "GIT_TEST_COMMIT_GRAPH_CHANGED_PATHS"
 
@@ -67,6 +68,7 @@ struct commit_graph {
 	const uint32_t *chunk_oid_fanout;
 	const unsigned char *chunk_oid_lookup;
 	const unsigned char *chunk_commit_data;
+	const unsigned char *chunk_generation_data;
 	const unsigned char *chunk_extra_edges;
 	const unsigned char *chunk_base_graphs;
 	const unsigned char *chunk_bloom_indexes;
diff --git a/t/README b/t/README
index 70ec61cf88..6647ef132e 100644
--- a/t/README
+++ b/t/README
@@ -379,6 +379,9 @@ GIT_TEST_COMMIT_GRAPH=<boolean>, when true, forces the commit-graph to
 be written after every 'git commit' command, and overrides the
 'core.commitGraph' setting to true.
 
+GIT_TEST_COMMIT_GRAPH_NO_GDAT=<boolean>, when true, forces the
+commit-graph to be written without generation data chunk.
+
 GIT_TEST_COMMIT_GRAPH_CHANGED_PATHS=<boolean>, when true, forces
 commit-graph write to compute and write changed path Bloom filters for
 every 'git commit-graph write', as if the `--changed-paths` option was
diff --git a/t/helper/test-read-graph.c b/t/helper/test-read-graph.c
index 6d0c962438..1c2a5366c7 100644
--- a/t/helper/test-read-graph.c
+++ b/t/helper/test-read-graph.c
@@ -32,6 +32,8 @@ int cmd__read_graph(int argc, const char **argv)
 		printf(" oid_lookup");
 	if (graph->chunk_commit_data)
 		printf(" commit_metadata");
+	if (graph->chunk_generation_data)
+		printf(" generation_data");
 	if (graph->chunk_extra_edges)
 		printf(" extra_edges");
 	if (graph->chunk_bloom_indexes)
diff --git a/t/t4216-log-bloom.sh b/t/t4216-log-bloom.sh
index c21cc160f3..55c94e9ebd 100755
--- a/t/t4216-log-bloom.sh
+++ b/t/t4216-log-bloom.sh
@@ -33,11 +33,11 @@ test_expect_success 'setup test - repo, commits, commit graph, log outputs' '
 	git commit-graph write --reachable --changed-paths
 '
 graph_read_expect () {
-	NUM_CHUNKS=5
+	NUM_CHUNKS=6
 	cat >expect <<- EOF
 	header: 43475048 1 1 $NUM_CHUNKS 0
 	num_commits: $1
-	chunks: oid_fanout oid_lookup commit_metadata bloom_indexes bloom_data
+	chunks: oid_fanout oid_lookup commit_metadata generation_data bloom_indexes bloom_data
 	EOF
 	test-tool read-graph >actual &&
 	test_cmp expect actual
diff --git a/t/t5318-commit-graph.sh b/t/t5318-commit-graph.sh
index 044cf8a3de..b41b2160c6 100755
--- a/t/t5318-commit-graph.sh
+++ b/t/t5318-commit-graph.sh
@@ -71,7 +71,7 @@ graph_git_behavior 'no graph' full commits/3 commits/1
 graph_read_expect() {
 	OPTIONAL=""
 	NUM_CHUNKS=3
-	if test ! -z $2
+	if test ! -z "$2"
 	then
 		OPTIONAL=" $2"
 		NUM_CHUNKS=$((3 + $(echo "$2" | wc -w)))
@@ -98,14 +98,14 @@ test_expect_success 'exit with correct error on bad input to --stdin-commits' '
 	# valid commit and tree OID
 	git rev-parse HEAD HEAD^{tree} >in &&
 	git commit-graph write --stdin-commits <in &&
-	graph_read_expect 3
+	graph_read_expect 3 generation_data
 '
 
 test_expect_success 'write graph' '
 	cd "$TRASH_DIRECTORY/full" &&
 	git commit-graph write &&
 	test_path_is_file $objdir/info/commit-graph &&
-	graph_read_expect "3"
+	graph_read_expect "3" generation_data
 '
 
 test_expect_success POSIXPERM 'write graph has correct permissions' '
@@ -214,7 +214,7 @@ test_expect_success 'write graph with merges' '
 	cd "$TRASH_DIRECTORY/full" &&
 	git commit-graph write &&
 	test_path_is_file $objdir/info/commit-graph &&
-	graph_read_expect "10" "extra_edges"
+	graph_read_expect "10" "generation_data extra_edges"
 '
 
 graph_git_behavior 'merge 1 vs 2' full merge/1 merge/2
@@ -249,7 +249,7 @@ test_expect_success 'write graph with new commit' '
 	cd "$TRASH_DIRECTORY/full" &&
 	git commit-graph write &&
 	test_path_is_file $objdir/info/commit-graph &&
-	graph_read_expect "11" "extra_edges"
+	graph_read_expect "11" "generation_data extra_edges"
 '
 
 graph_git_behavior 'full graph, commit 8 vs merge 1' full commits/8 merge/1
@@ -259,7 +259,7 @@ test_expect_success 'write graph with nothing new' '
 	cd "$TRASH_DIRECTORY/full" &&
 	git commit-graph write &&
 	test_path_is_file $objdir/info/commit-graph &&
-	graph_read_expect "11" "extra_edges"
+	graph_read_expect "11" "generation_data extra_edges"
 '
 
 graph_git_behavior 'cleared graph, commit 8 vs merge 1' full commits/8 merge/1
@@ -269,7 +269,7 @@ test_expect_success 'build graph from latest pack with closure' '
 	cd "$TRASH_DIRECTORY/full" &&
 	cat new-idx | git commit-graph write --stdin-packs &&
 	test_path_is_file $objdir/info/commit-graph &&
-	graph_read_expect "9" "extra_edges"
+	graph_read_expect "9" "generation_data extra_edges"
 '
 
 graph_git_behavior 'graph from pack, commit 8 vs merge 1' full commits/8 merge/1
@@ -282,7 +282,7 @@ test_expect_success 'build graph from commits with closure' '
 	git rev-parse merge/1 >>commits-in &&
 	cat commits-in | git commit-graph write --stdin-commits &&
 	test_path_is_file $objdir/info/commit-graph &&
-	graph_read_expect "6"
+	graph_read_expect "6" "generation_data"
 '
 
 graph_git_behavior 'graph from commits, commit 8 vs merge 1' full commits/8 merge/1
@@ -292,7 +292,7 @@ test_expect_success 'build graph from commits with append' '
 	cd "$TRASH_DIRECTORY/full" &&
 	git rev-parse merge/3 | git commit-graph write --stdin-commits --append &&
 	test_path_is_file $objdir/info/commit-graph &&
-	graph_read_expect "10" "extra_edges"
+	graph_read_expect "10" "generation_data extra_edges"
 '
 
 graph_git_behavior 'append graph, commit 8 vs merge 1' full commits/8 merge/1
@@ -302,7 +302,7 @@ test_expect_success 'build graph using --reachable' '
 	cd "$TRASH_DIRECTORY/full" &&
 	git commit-graph write --reachable &&
 	test_path_is_file $objdir/info/commit-graph &&
-	graph_read_expect "11" "extra_edges"
+	graph_read_expect "11" "generation_data extra_edges"
 '
 
 graph_git_behavior 'append graph, commit 8 vs merge 1' full commits/8 merge/1
@@ -323,7 +323,7 @@ test_expect_success 'write graph in bare repo' '
 	cd "$TRASH_DIRECTORY/bare" &&
 	git commit-graph write &&
 	test_path_is_file $baredir/info/commit-graph &&
-	graph_read_expect "11" "extra_edges"
+	graph_read_expect "11" "generation_data extra_edges"
 '
 
 graph_git_behavior 'bare repo with graph, commit 8 vs merge 1' bare commits/8 merge/1
@@ -420,8 +420,9 @@ test_expect_success 'replace-objects invalidates commit-graph' '
 
 test_expect_success 'git commit-graph verify' '
 	cd "$TRASH_DIRECTORY/full" &&
-	git rev-parse commits/8 | git commit-graph write --stdin-commits &&
-	git commit-graph verify >output
+	git rev-parse commits/8 | GIT_TEST_COMMIT_GRAPH_NO_GDAT=1 git commit-graph write --stdin-commits &&
+	git commit-graph verify >output &&
+	graph_read_expect 9 extra_edges
 '
 
 NUM_COMMITS=9
diff --git a/t/t5324-split-commit-graph.sh b/t/t5324-split-commit-graph.sh
index ea28d522b8..531016f405 100755
--- a/t/t5324-split-commit-graph.sh
+++ b/t/t5324-split-commit-graph.sh
@@ -13,11 +13,11 @@ test_expect_success 'setup repo' '
 	infodir=".git/objects/info" &&
 	graphdir="$infodir/commit-graphs" &&
 	test_oid_cache <<-EOM
-	shallow sha1:1760
-	shallow sha256:2064
+	shallow sha1:2132
+	shallow sha256:2436
 
-	base sha1:1376
-	base sha256:1496
+	base sha1:1408
+	base sha256:1528
 	EOM
 '
 
@@ -28,9 +28,9 @@ graph_read_expect() {
 		NUM_BASE=$2
 	fi
 	cat >expect <<- EOF
-	header: 43475048 1 1 3 $NUM_BASE
+	header: 43475048 1 1 4 $NUM_BASE
 	num_commits: $1
-	chunks: oid_fanout oid_lookup commit_metadata
+	chunks: oid_fanout oid_lookup commit_metadata generation_data
 	EOF
 	test-tool read-graph >output &&
 	test_cmp expect output
diff --git a/t/t6600-test-reach.sh b/t/t6600-test-reach.sh
index 475564bee7..d14b129f06 100755
--- a/t/t6600-test-reach.sh
+++ b/t/t6600-test-reach.sh
@@ -55,10 +55,13 @@ test_expect_success 'setup' '
 	git show-ref -s commit-5-5 | git commit-graph write --stdin-commits &&
 	mv .git/objects/info/commit-graph commit-graph-half &&
 	chmod u+w commit-graph-half &&
+	GIT_TEST_COMMIT_GRAPH_NO_GDAT=1 git commit-graph write --reachable &&
+	mv .git/objects/info/commit-graph commit-graph-no-gdat &&
+	chmod u+w commit-graph-no-gdat &&
 	git config core.commitGraph true
 '
 
-run_three_modes () {
+run_all_modes () {
 	test_when_finished rm -rf .git/objects/info/commit-graph &&
 	"$@" <input >actual &&
 	test_cmp expect actual &&
@@ -67,11 +70,14 @@ run_three_modes () {
 	test_cmp expect actual &&
 	cp commit-graph-half .git/objects/info/commit-graph &&
 	"$@" <input >actual &&
+	test_cmp expect actual &&
+	cp commit-graph-no-gdat .git/objects/info/commit-graph &&
+	"$@" <input >actual &&
 	test_cmp expect actual
 }
 
-test_three_modes () {
-	run_three_modes test-tool reach "$@"
+test_all_modes () {
+	run_all_modes test-tool reach "$@"
 }
 
 test_expect_success 'ref_newer:miss' '
@@ -80,7 +86,7 @@ test_expect_success 'ref_newer:miss' '
 	B:commit-4-9
 	EOF
 	echo "ref_newer(A,B):0" >expect &&
-	test_three_modes ref_newer
+	test_all_modes ref_newer
 '
 
 test_expect_success 'ref_newer:hit' '
@@ -89,7 +95,7 @@ test_expect_success 'ref_newer:hit' '
 	B:commit-2-3
 	EOF
 	echo "ref_newer(A,B):1" >expect &&
-	test_three_modes ref_newer
+	test_all_modes ref_newer
 '
 
 test_expect_success 'in_merge_bases:hit' '
@@ -98,7 +104,7 @@ test_expect_success 'in_merge_bases:hit' '
 	B:commit-8-8
 	EOF
 	echo "in_merge_bases(A,B):1" >expect &&
-	test_three_modes in_merge_bases
+	test_all_modes in_merge_bases
 '
 
 test_expect_success 'in_merge_bases:miss' '
@@ -107,7 +113,7 @@ test_expect_success 'in_merge_bases:miss' '
 	B:commit-5-9
 	EOF
 	echo "in_merge_bases(A,B):0" >expect &&
-	test_three_modes in_merge_bases
+	test_all_modes in_merge_bases
 '
 
 test_expect_success 'is_descendant_of:hit' '
@@ -118,7 +124,7 @@ test_expect_success 'is_descendant_of:hit' '
 	X:commit-1-1
 	EOF
 	echo "is_descendant_of(A,X):1" >expect &&
-	test_three_modes is_descendant_of
+	test_all_modes is_descendant_of
 '
 
 test_expect_success 'is_descendant_of:miss' '
@@ -129,7 +135,7 @@ test_expect_success 'is_descendant_of:miss' '
 	X:commit-7-6
 	EOF
 	echo "is_descendant_of(A,X):0" >expect &&
-	test_three_modes is_descendant_of
+	test_all_modes is_descendant_of
 '
 
 test_expect_success 'get_merge_bases_many' '
@@ -144,7 +150,7 @@ test_expect_success 'get_merge_bases_many' '
 		git rev-parse commit-5-6 \
 			      commit-4-7 | sort
 	} >expect &&
-	test_three_modes get_merge_bases_many
+	test_all_modes get_merge_bases_many
 '
 
 test_expect_success 'reduce_heads' '
@@ -166,7 +172,7 @@ test_expect_success 'reduce_heads' '
 			      commit-2-8 \
 			      commit-1-10 | sort
 	} >expect &&
-	test_three_modes reduce_heads
+	test_all_modes reduce_heads
 '
 
 test_expect_success 'can_all_from_reach:hit' '
@@ -189,7 +195,7 @@ test_expect_success 'can_all_from_reach:hit' '
 	Y:commit-8-1
 	EOF
 	echo "can_all_from_reach(X,Y):1" >expect &&
-	test_three_modes can_all_from_reach
+	test_all_modes can_all_from_reach
 '
 
 test_expect_success 'can_all_from_reach:miss' '
@@ -211,7 +217,7 @@ test_expect_success 'can_all_from_reach:miss' '
 	Y:commit-8-5
 	EOF
 	echo "can_all_from_reach(X,Y):0" >expect &&
-	test_three_modes can_all_from_reach
+	test_all_modes can_all_from_reach
 '
 
 test_expect_success 'can_all_from_reach_with_flag: tags case' '
@@ -234,7 +240,7 @@ test_expect_success 'can_all_from_reach_with_flag: tags case' '
 	Y:commit-8-1
 	EOF
 	echo "can_all_from_reach_with_flag(X,_,_,0,0):1" >expect &&
-	test_three_modes can_all_from_reach_with_flag
+	test_all_modes can_all_from_reach_with_flag
 '
 
 test_expect_success 'commit_contains:hit' '
@@ -250,8 +256,8 @@ test_expect_success 'commit_contains:hit' '
 	X:commit-9-3
 	EOF
 	echo "commit_contains(_,A,X,_):1" >expect &&
-	test_three_modes commit_contains &&
-	test_three_modes commit_contains --tag
+	test_all_modes commit_contains &&
+	test_all_modes commit_contains --tag
 '
 
 test_expect_success 'commit_contains:miss' '
@@ -267,8 +273,8 @@ test_expect_success 'commit_contains:miss' '
 	X:commit-9-3
 	EOF
 	echo "commit_contains(_,A,X,_):0" >expect &&
-	test_three_modes commit_contains &&
-	test_three_modes commit_contains --tag
+	test_all_modes commit_contains &&
+	test_all_modes commit_contains --tag
 '
 
 test_expect_success 'rev-list: basic topo-order' '
@@ -280,7 +286,7 @@ test_expect_success 'rev-list: basic topo-order' '
 		commit-6-2 commit-5-2 commit-4-2 commit-3-2 commit-2-2 commit-1-2 \
 		commit-6-1 commit-5-1 commit-4-1 commit-3-1 commit-2-1 commit-1-1 \
 	>expect &&
-	run_three_modes git rev-list --topo-order commit-6-6
+	run_all_modes git rev-list --topo-order commit-6-6
 '
 
 test_expect_success 'rev-list: first-parent topo-order' '
@@ -292,7 +298,7 @@ test_expect_success 'rev-list: first-parent topo-order' '
 		commit-6-2 \
 		commit-6-1 commit-5-1 commit-4-1 commit-3-1 commit-2-1 commit-1-1 \
 	>expect &&
-	run_three_modes git rev-list --first-parent --topo-order commit-6-6
+	run_all_modes git rev-list --first-parent --topo-order commit-6-6
 '
 
 test_expect_success 'rev-list: range topo-order' '
@@ -304,7 +310,7 @@ test_expect_success 'rev-list: range topo-order' '
 		commit-6-2 commit-5-2 commit-4-2 \
 		commit-6-1 commit-5-1 commit-4-1 \
 	>expect &&
-	run_three_modes git rev-list --topo-order commit-3-3..commit-6-6
+	run_all_modes git rev-list --topo-order commit-3-3..commit-6-6
 '
 
 test_expect_success 'rev-list: range topo-order' '
@@ -316,7 +322,7 @@ test_expect_success 'rev-list: range topo-order' '
 		commit-6-2 commit-5-2 commit-4-2 \
 		commit-6-1 commit-5-1 commit-4-1 \
 	>expect &&
-	run_three_modes git rev-list --topo-order commit-3-8..commit-6-6
+	run_all_modes git rev-list --topo-order commit-3-8..commit-6-6
 '
 
 test_expect_success 'rev-list: first-parent range topo-order' '
@@ -328,7 +334,7 @@ test_expect_success 'rev-list: first-parent range topo-order' '
 		commit-6-2 \
 		commit-6-1 commit-5-1 commit-4-1 \
 	>expect &&
-	run_three_modes git rev-list --first-parent --topo-order commit-3-8..commit-6-6
+	run_all_modes git rev-list --first-parent --topo-order commit-3-8..commit-6-6
 '
 
 test_expect_success 'rev-list: ancestry-path topo-order' '
@@ -338,7 +344,7 @@ test_expect_success 'rev-list: ancestry-path topo-order' '
 		commit-6-4 commit-5-4 commit-4-4 commit-3-4 \
 		commit-6-3 commit-5-3 commit-4-3 \
 	>expect &&
-	run_three_modes git rev-list --topo-order --ancestry-path commit-3-3..commit-6-6
+	run_all_modes git rev-list --topo-order --ancestry-path commit-3-3..commit-6-6
 '
 
 test_expect_success 'rev-list: symmetric difference topo-order' '
@@ -352,7 +358,7 @@ test_expect_success 'rev-list: symmetric difference topo-order' '
 		commit-3-8 commit-2-8 commit-1-8 \
 		commit-3-7 commit-2-7 commit-1-7 \
 	>expect &&
-	run_three_modes git rev-list --topo-order commit-3-8...commit-6-6
+	run_all_modes git rev-list --topo-order commit-3-8...commit-6-6
 '
 
 test_expect_success 'get_reachable_subset:all' '
@@ -372,7 +378,7 @@ test_expect_success 'get_reachable_subset:all' '
 			      commit-1-7 \
 			      commit-5-6 | sort
 	) >expect &&
-	test_three_modes get_reachable_subset
+	test_all_modes get_reachable_subset
 '
 
 test_expect_success 'get_reachable_subset:some' '
@@ -390,7 +396,7 @@ test_expect_success 'get_reachable_subset:some' '
 		git rev-parse commit-3-3 \
 			      commit-1-7 | sort
 	) >expect &&
-	test_three_modes get_reachable_subset
+	test_all_modes get_reachable_subset
 '
 
 test_expect_success 'get_reachable_subset:none' '
@@ -404,7 +410,7 @@ test_expect_success 'get_reachable_subset:none' '
 	Y:commit-2-8
 	EOF
 	echo "get_reachable_subset(X,Y)" >expect &&
-	test_three_modes get_reachable_subset
+	test_all_modes get_reachable_subset
 '
 
 test_done
