diff --git a/test/touchpad.c b/test/touchpad.c
index 329eeb38..875bc580 100644
--- a/test/touchpad.c
+++ b/test/touchpad.c
@@ -456,6 +456,7 @@ START_TEST(touchpad_4fg_clickfinger_btntool_3slots)
 	struct libinput_event *event;
 
 	if (libevdev_get_num_slots(dev->evdev) >= 4 ||
+	    libevdev_get_num_slots(dev->evdev) < 3 ||
 	    !libevdev_has_event_code(dev->evdev, EV_KEY, BTN_TOOL_TRIPLETAP))
 		return;