diff --git a/t/lib-commit-graph.sh b/t/lib-commit-graph.sh
index c8bd76a777..89b26676fb 100755
--- a/t/lib-commit-graph.sh
+++ b/t/lib-commit-graph.sh
@@ -27,14 +27,11 @@ graph_git_behavior() {
 	BRANCH=$3
 	COMPARE=$4
 	test_expect_success "check normal git operations: $MSG" '
-		(
-			cd "$TRASH_DIRECTORY" &&
-			graph_git_two_modes "${DIR:+-C $DIR} log --oneline $BRANCH" &&
-			graph_git_two_modes "${DIR:+-C $DIR} log --topo-order $BRANCH" &&
-			graph_git_two_modes "${DIR:+-C $DIR} log --graph $COMPARE..$BRANCH" &&
-			graph_git_two_modes "${DIR:+-C $DIR} branch -vv" &&
-			graph_git_two_modes "${DIR:+-C $DIR} merge-base -a $BRANCH $COMPARE"
-		)
+		graph_git_two_modes "${DIR:+-C $DIR} log --oneline $BRANCH" &&
+		graph_git_two_modes "${DIR:+-C $DIR} log --topo-order $BRANCH" &&
+		graph_git_two_modes "${DIR:+-C $DIR} log --graph $COMPARE..$BRANCH" &&
+		graph_git_two_modes "${DIR:+-C $DIR} branch -vv" &&
+		graph_git_two_modes "${DIR:+-C $DIR} merge-base -a $BRANCH $COMPARE"
 	'
 }