diff --git a/tests/pm_pc8.c b/tests/pm_pc8.c
index 1f6d038d..d6b68e4a 100644
--- a/tests/pm_pc8.c
+++ b/tests/pm_pc8.c
@@ -751,6 +751,9 @@ static void setup_environment(void)
 	drm_fd = drm_open_any();
 	igt_assert(drm_fd >= 0);
 
+	igt_require_f(drmSetMaster(drm_fd) == 0, "Can't become DRM master, "
+		      "please check if no other DRM client is running.\n");
+
 	init_mode_set_data(&ms_data);
 
 	setup_non_graphics_runtime_pm();