diff --git a/tools/testing/selftests/timers/leap-a-day.c b/tools/testing/selftests/timers/leap-a-day.c
index 3568cfb3e815..97c8c66bea88 100644
--- a/tools/testing/selftests/timers/leap-a-day.c
+++ b/tools/testing/selftests/timers/leap-a-day.c
@@ -9,16 +9,19 @@
  *  kernel's leap-second behavior, as well as how well applications
  *  handle the leap-second discontinuity.
  *
- *  Usage: leap-a-day [-s] [-i <num>]
+ *  Usage: leap-a-day [-w] [-i <num>] [-t]
  *
  *  Options:
- *	-s:	Each iteration, set the date to 10 seconds before midnight GMT.
- *		This speeds up the number of leapsecond transitions tested,
- *		but because it calls settimeofday frequently, advancing the
- *		time by 24 hours every ~16 seconds, it may cause application
- *		disruption.
+ *	-w:	Only set the leap-second flag and wait for the leap second
+ *		each iteration, instead of advancing the time. By default the
+ *		date is set to 10 seconds before midnight GMT, which speeds up
+ *		the number of leapsecond transitions tested, but because it
+ *		calls settimeofday frequently, advancing the time by 24 hours
+ *		every ~16 seconds, it may cause application disruption.
  *
- *	-i:	Number of iterations to run (default: infinite)
+ *	-i:	Number of iterations to run (-1 = infinite, default: 10)
+ *
+ *	-t:	Print TAI time.
  *
  *  Other notes: Disabling NTP prior to running this is advised, as the two
  *		 may conflict in their commands to the kernel.
@@ -186,7 +189,7 @@ int main(int argc, char **argv)
 	int opt;
 
 	/* Process arguments */
-	while ((opt = getopt(argc, argv, "sti:")) != -1) {
+	while ((opt = getopt(argc, argv, "wti:")) != -1) {
 		switch (opt) {
 		case 'w':
 			printf("Only setting leap-flag, not changing time. It could take up to a day for leap to trigger.\n");