diff --git a/test/rt/nanos6/if0.c b/test/rt/nanos6/if0.c
index 7b35219..7de6999 100644
--- a/test/rt/nanos6/if0.c
+++ b/test/rt/nanos6/if0.c
@@ -3,13 +3,14 @@
 
 #define _GNU_SOURCE
 #include <unistd.h>
+#include "compat.h"
 
 int
 main(void)
 {
 	#pragma oss task if (0)
 	{
-		usleep(1000);
+		sleep_us(1000);
 	}
 	return 0;
 }
diff --git a/test/rt/nanos6/taskfor.c b/test/rt/nanos6/taskfor.c
index 1dfd68b..047c734 100644
--- a/test/rt/nanos6/taskfor.c
+++ b/test/rt/nanos6/taskfor.c
@@ -3,13 +3,14 @@
 
 #define _GNU_SOURCE
 #include <unistd.h>
+#include "compat.h"
 
 int
 main(void)
 {
 	#pragma oss task for
 	for (int i = 0; i < 1024; i++)
-		usleep(1000);
+		sleep_us(1000);
 
 	return 0;
 }
diff --git a/test/rt/nosv/waitfor.c b/test/rt/nosv/waitfor.c
index 3758d87..888f791 100644
--- a/test/rt/nosv/waitfor.c
+++ b/test/rt/nosv/waitfor.c
@@ -9,6 +9,7 @@
 #include <unistd.h>
 
 #include "common.h"
+#include "compat.h"
 
 #define NTASKS 200
 atomic_int ncompleted = 0;
@@ -46,7 +47,7 @@ main(void)
 		nosv_submit(tasks[i], 0);
 
 	while (atomic_load(&ncompleted) != NTASKS)
-		usleep(1000);
+		sleep_us(1000);
 
 	for (int i = 0; i < NTASKS; i++)
 		nosv_destroy(tasks[i], 0);