diff --git a/test/dm/clk.c b/test/dm/clk.c
index b06906a..898c034 100644
--- a/test/dm/clk.c
+++ b/test/dm/clk.c
@@ -28,6 +28,7 @@
 	ut_assertok(uclass_get_device_by_name(UCLASS_MISC, "clk-test",
 					      &dev_test));
 	ut_assertok(sandbox_clk_test_get(dev_test));
+	ut_assertok(sandbox_clk_test_valid(dev_test));
 
 	ut_asserteq(1234,
 		    sandbox_clk_test_get_rate(dev_test,