diff --git a/tests/timer/timer_test.c b/tests/timer/timer_test.c
index 3775151..61079bd 100644
--- a/tests/timer/timer_test.c
+++ b/tests/timer/timer_test.c
@@ -60,7 +60,7 @@
 
 /* timer imprecision that we accept for this test: 10 milliseconds. */
 #define TIMER_PRES_SECS		0
-#define TIMER_PRES_USECS	10000
+#define TIMER_PRES_USECS	20000
 
 static int timer_nsteps = MAIN_TIMER_NSTEPS;
 static unsigned int expired_timers = 0;
diff --git a/tests/timer/timer_test.ok b/tests/timer/timer_test.ok
index b4e0e11..1bb382e 100644
--- a/tests/timer/timer_test.ok
+++ b/tests/timer/timer_test.ok
@@ -1,2 +1,2 @@
-Running timer test for 5 steps, accepting imprecision of 0.010000 seconds
+Running timer test for 5 steps, accepting imprecision of 0.020000 seconds
 test over: added=31 expired=31 too_late=0