diff --git a/tests/qtest/qos-test.c b/tests/qtest/qos-test.c
index 831db5cf2a..33cdada380 100644
--- a/tests/qtest/qos-test.c
+++ b/tests/qtest/qos-test.c
@@ -185,7 +185,9 @@ static void run_one_test(const void *arg)
 static void subprocess_run_one_test(const void *arg)
 {
     const gchar *path = arg;
-    g_test_trap_subprocess(path, 0, 0);
+    g_test_trap_subprocess(path, 0,
+                           G_TEST_SUBPROCESS_INHERIT_STDOUT |
+                           G_TEST_SUBPROCESS_INHERIT_STDERR);
     g_test_trap_assert_passed();
 }