diff --git a/tools/testing/selftests/alsa/mixer-test.c b/tools/testing/selftests/alsa/mixer-test.c
index 37da902545a4..d59910658c8c 100644
--- a/tools/testing/selftests/alsa/mixer-test.c
+++ b/tools/testing/selftests/alsa/mixer-test.c
@@ -205,7 +205,7 @@ static void find_controls(void)
 		err = snd_ctl_poll_descriptors(card_data->handle,
 					       &card_data->pollfd, 1);
 		if (err != 1) {
-			ksft_exit_fail_msg("snd_ctl_poll_descriptors() failed for %d\n",
+			ksft_exit_fail_msg("snd_ctl_poll_descriptors() failed for card %d: %d\n",
 				       card, err);
 		}