diff --git a/test/serialapi/test_serialapi.c b/test/serialapi/test_serialapi.c
index ed9a6d0..657e7e8 100644
--- a/test/serialapi/test_serialapi.c
+++ b/test/serialapi/test_serialapi.c
@@ -126,7 +126,7 @@ uint8_t Device_SendFrame(session_t *session) {
 
   {
     fd_set rfds;
-    struct timeval tv = {.tv_usec = 100};
+    struct timeval tv = {.tv_usec = 1000};
 
     FD_ZERO(&rfds);
     FD_SET(end_device, &rfds);