diff --git a/tests/qtest/microbit-test.c b/tests/qtest/microbit-test.c
index 2abcad8e31..72190d38f7 100644
--- a/tests/qtest/microbit-test.c
+++ b/tests/qtest/microbit-test.c
@@ -434,6 +434,8 @@ static void test_nrf51_gpio_detect(void)
     g_assert_true(qtest_get_irq(qts, 0));
     qtest_set_irq_in(qts, "/machine/nrf51", "unnamed-gpio-in", 3, 0);
     g_assert_true(qtest_get_irq(qts, 0));
+
+    qtest_quit(qts);
 }
 
 static void timer_task(QTestState *qts, hwaddr task)