diff --git a/t/t6600-test-reach.sh b/t/t6600-test-reach.sh
index 9d65b8b946..288f703b7b 100755
--- a/t/t6600-test-reach.sh
+++ b/t/t6600-test-reach.sh
@@ -243,4 +243,88 @@ test_expect_success 'commit_contains:miss' '
 	test_three_modes commit_contains --tag
 '
 
+test_expect_success 'rev-list: basic topo-order' '
+	git rev-parse \
+		commit-6-6 commit-5-6 commit-4-6 commit-3-6 commit-2-6 commit-1-6 \
+		commit-6-5 commit-5-5 commit-4-5 commit-3-5 commit-2-5 commit-1-5 \
+		commit-6-4 commit-5-4 commit-4-4 commit-3-4 commit-2-4 commit-1-4 \
+		commit-6-3 commit-5-3 commit-4-3 commit-3-3 commit-2-3 commit-1-3 \
+		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
+'
+
+test_expect_success 'rev-list: first-parent topo-order' '
+	git rev-parse \
+		commit-6-6 \
+		commit-6-5 \
+		commit-6-4 \
+		commit-6-3 \
+		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
+'
+
+test_expect_success 'rev-list: range topo-order' '
+	git rev-parse \
+		commit-6-6 commit-5-6 commit-4-6 commit-3-6 commit-2-6 commit-1-6 \
+		commit-6-5 commit-5-5 commit-4-5 commit-3-5 commit-2-5 commit-1-5 \
+		commit-6-4 commit-5-4 commit-4-4 commit-3-4 commit-2-4 commit-1-4 \
+		commit-6-3 commit-5-3 commit-4-3 \
+		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
+'
+
+test_expect_success 'rev-list: range topo-order' '
+	git rev-parse \
+		commit-6-6 commit-5-6 commit-4-6 \
+		commit-6-5 commit-5-5 commit-4-5 \
+		commit-6-4 commit-5-4 commit-4-4 \
+		commit-6-3 commit-5-3 commit-4-3 \
+		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
+'
+
+test_expect_success 'rev-list: first-parent range topo-order' '
+	git rev-parse \
+		commit-6-6 \
+		commit-6-5 \
+		commit-6-4 \
+		commit-6-3 \
+		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
+'
+
+test_expect_success 'rev-list: ancestry-path topo-order' '
+	git rev-parse \
+		commit-6-6 commit-5-6 commit-4-6 commit-3-6 \
+		commit-6-5 commit-5-5 commit-4-5 commit-3-5 \
+		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
+'
+
+test_expect_success 'rev-list: symmetric difference topo-order' '
+	git rev-parse \
+		commit-6-6 commit-5-6 commit-4-6 \
+		commit-6-5 commit-5-5 commit-4-5 \
+		commit-6-4 commit-5-4 commit-4-4 \
+		commit-6-3 commit-5-3 commit-4-3 \
+		commit-6-2 commit-5-2 commit-4-2 \
+		commit-6-1 commit-5-1 commit-4-1 \
+		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
+'
+
 test_done