diff --git a/buildno.txt b/buildno.txt
index 4880c9fb..a788b7b3 100644
--- a/buildno.txt
+++ b/buildno.txt
@@ -1 +1 @@
-1132
+1134
diff --git a/mfstests/mfstest_clocks.c b/mfstests/mfstest_clocks.c
index 08dfcc33..3cd08c80 100644
--- a/mfstests/mfstest_clocks.c
+++ b/mfstests/mfstest_clocks.c
@@ -30,37 +30,56 @@
 
 #include "mfstest.h"
 
+uint64_t wallclock_utime(void) {
+	struct timeval tv;
+	uint64_t usec;
+
+	gettimeofday(&tv,NULL);
+	usec = tv.tv_sec;
+	usec *= 1000000;
+	usec += tv.tv_usec;
+	return usec;
+}
+
 int main(void) {
 	double st,en;
 	uint64_t stusec,enusec;
 	uint64_t stnsec,ennsec;
+	uint64_t wcstusec,wcenusec;
 
 	if (strcmp(monotonic_method(),"time")==0) {
 		printf("testing classic 'time(NULL)' clock doesn't make sense\n");
 		return 77;
 	}
+
 	mfstest_init();
 
 	mfstest_start(monotonic_clocks);
+
 	printf("used method: %s\n",monotonic_method());
 	st = monotonic_seconds();
 	stusec = monotonic_useconds();
 	stnsec = monotonic_nseconds();
+	wcstusec = wallclock_utime();
 	portable_usleep(10000);
 	en = monotonic_seconds();
 	enusec = monotonic_useconds();
 	ennsec = monotonic_nseconds();
+	wcenusec = wallclock_utime();
 	en -= st;
 	enusec -= stusec;
 	ennsec -= stnsec;
-	printf("second: %.6lf ; %"PRIu64" ; %"PRIu64"\n",en,enusec,ennsec);
+	wcenusec -= wcstusec;
+	printf("second: %.6lf ; %"PRIu64" ; %"PRIu64" ; %"PRIu64"\n",en,enusec,ennsec,wcenusec);
 
 	mfstest_assert_double_ge(en,0.01);
 	mfstest_assert_uint64_ge(enusec,10000);
 	mfstest_assert_uint64_ge(ennsec,10000000);
-	mfstest_assert_double_lt(en,0.012);
-	mfstest_assert_uint64_lt(enusec,12000);
-	mfstest_assert_uint64_lt(ennsec,12000000);
+	mfstest_assert_uint64_ge(wcenusec,10000);
+	mfstest_assert_double_lt(en,0.02);
+	mfstest_assert_uint64_lt(enusec,20000);
+	mfstest_assert_uint64_lt(ennsec,20000000);
+	mfstest_assert_uint64_lt(wcenusec,20000);
 
 	mfstest_end();
 	mfstest_return();
diff --git a/mfstests/mfstest_delayrun.c b/mfstests/mfstest_delayrun.c
index 3b3dd92a..eeec78d6 100644
--- a/mfstests/mfstest_delayrun.c
+++ b/mfstests/mfstest_delayrun.c
@@ -39,6 +39,15 @@ void set_variable(void *arg) {
 	global_variable = *a;
 }
 
+void corrected_usleep(uint64_t us) {
+	uint64_t st,en;
+	st = monotonic_useconds();
+	do {
+		portable_usleep(100);
+		en = monotonic_useconds();
+	} while (st+us>=en);
+}
+
 int main(void) {
 	uint32_t values[7] = {0,1,2,3,4,5,6};
 	mfstest_init();
@@ -49,27 +58,27 @@ int main(void) {
 
 	global_variable = 0xFFFFFFFF;
 	delay_run(set_variable,values,10000);
-	portable_usleep(20000);
+	corrected_usleep(20000);
 	mfstest_assert_uint32_eq(global_variable,0);
 	delay_run(set_variable,values+2,30000);
 	delay_run(set_variable,values+3,50000);
 	delay_run(set_variable,values+1,10000);
 	mfstest_assert_uint32_eq(global_variable,0);
-	portable_usleep(20000);
+	corrected_usleep(20000);
 	mfstest_assert_uint32_eq(global_variable,1);
-	portable_usleep(20000);
+	corrected_usleep(20000);
 	mfstest_assert_uint32_eq(global_variable,2);
-	portable_usleep(20000);
+	corrected_usleep(20000);
 	mfstest_assert_uint32_eq(global_variable,3);
 	delay_run(set_variable,values+6,60000);
-	portable_usleep(10000);
+	corrected_usleep(10000);
 	delay_run(set_variable,values+4,10000);
-	portable_usleep(20000);
+	corrected_usleep(20000);
 	mfstest_assert_uint32_eq(global_variable,4);
 	delay_run(set_variable,values+5,10000);
-	portable_usleep(20000);
+	corrected_usleep(20000);
 	mfstest_assert_uint32_eq(global_variable,5);
-	portable_usleep(20000);
+	corrected_usleep(20000);
 	mfstest_assert_uint32_eq(global_variable,6);
 
 	delay_term();