t/lib-submodule-update.sh: fix test ignoring ignored files in submodules

diff --git a/t/t6009-rev-list-parent.sh b/t/t6009-rev-list-parent.sh
index 66cda17ef342a2791ce7bac873eecfd4cf319faf..20e3e2554a132552b5e398a2c449cedbef6ccb1e 100755 (executable)
--- a/t/t6009-rev-list-parent.sh
+++ b/t/t6009-rev-list-parent.sh
@@ -47,7 +47,9 @@ test_expect_success 'setup roots, merges and octopuses' '
        git checkout -b yetanotherbranch four &&
        test_commit eight &&
        git checkout master &&
-       test_merge normalmerge newroot &&
+       test_tick &&
+       git merge --allow-unrelated-histories -m normalmerge newroot &&
+       git tag normalmerge &&
        test_tick &&
        git merge -m tripus sidebranch anotherbranch &&
        git tag tripus &&