diff --git a/tests/test_in_vterm/test.sh b/tests/test_in_vterm/test.sh
index 930aab75..e042aac1 100755
--- a/tests/test_in_vterm/test.sh
+++ b/tests/test_in_vterm/test.sh
@@ -38,8 +38,10 @@ test_tmux() {
 if test -z "$POWERLINE_TMUX_EXE" && test -d tests/bot-ci/deps/tmux ; then
 	for tmux in tests/bot-ci/deps/tmux/tmux-*/tmux ; do
 		export POWERLINE_TMUX_EXE="$PWD/$tmux"
+		test_tmux || true
 	done
 else
+	export POWERLINE_TMUX_EXE="${POWERLINE_TMUX_EXE:-tmux}"
 	test_tmux || true
 fi