--- ./tests/prelude-timer.c	2016-09-15 08:49:10.810000884 +0200
+++ ./tests/prelude-timer.c	2017-05-16 07:18:40.763829280 +0200
@@ -31,7 +31,8 @@
         test_timer_t *timer = data;
         unsigned int elapsed = time(NULL) - timer->start_time;
 
-        assert(elapsed == prelude_timer_get_expire(&timer->timer));
+        assert(elapsed >= prelude_timer_get_expire(&timer->timer));
+        assert(elapsed <= prelude_timer_get_expire(&timer->timer)+1);
 
         prelude_timer_destroy(&timer->timer);
         free(timer);