diff --git a/tests/qtest/meson.build b/tests/qtest/meson.build
index fd40136fa9..78c298ce97 100644
--- a/tests/qtest/meson.build
+++ b/tests/qtest/meson.build
@@ -8,7 +8,7 @@ slow_qtests = {
   'test-hmp' : 240,
   'pxe-test': 600,
   'prom-env-test': 360,
-  'boot-serial-test': 180,
+  'boot-serial-test': 240,
   'qos-test': 120,
 }