diff --git a/tests/test_connect_delay.cpp b/tests/test_connect_delay.cpp
index 4742aa5a..752698d6 100644
--- a/tests/test_connect_delay.cpp
+++ b/tests/test_connect_delay.cpp
@@ -19,6 +19,7 @@ along with this program. If not, see <http://www.gnu.org/licenses/>.
 */
 
 #include "../include/zmq.h"
+#include "../include/zmq_utils.h"
 #include <errno.h>
 #include <stdlib.h>
 #include <string.h>
@@ -86,7 +87,7 @@ static void *server (void *)
     rc = zmq_term (context);
     assert (rc == 0);
 
-    pthread_exit(NULL);
+    return NULL;
 }
 
 static void *worker (void *)
@@ -129,7 +130,7 @@ static void *worker (void *)
     rc = zmq_term (context);
     assert (rc == 0);
 
-    pthread_exit(NULL);
+    return NULL;
 }
 
 int main (void)
@@ -170,7 +171,7 @@ int main (void)
         assert(rc >= 0);
     }
 
-    sleep(1);
+    zmq_sleep (1);
     seen = 0;
     for (int i = 0; i < 10; ++i)
     {
@@ -229,7 +230,7 @@ int main (void)
         assert (rc >= 0);
     }
 
-    sleep(1);
+    zmq_sleep (1);
 
     seen = 0;
     for (int i = 0; i < 10; ++i)