diff --git a/kernel/tests.c b/kernel/tests.c
index cd530bc4..0aa1ec03 100644
--- a/kernel/tests.c
+++ b/kernel/tests.c
@@ -310,7 +310,7 @@ void cli_on_disc(ClientEventArgs*e )
 
 void* client_task(void* e)
 {
-
+    int err = 0;
     Client cli;
     char   netbuffer[256];
     kprintf("created client");
@@ -319,16 +319,16 @@ void* client_task(void* e)
     cli._OnDisconnect = cli_on_disc;
     sleep(5);
 
-   shelldebugprint("Client is ready...\n");
+   SHELLDEBUGPRINTF("Client is ready...\n");
 
     while (cli_ConnectTo(&cli,"192.168.0.1",5555,0))
     {
-        shelldebugprint("retry connect\n");
+        SHELLDEBUGPRINTF("retry connect\n");
     }
-    shelldebugprint("connected\n");
+    SHELLDEBUGPRINTF("connected\n");
     sleep(1);
-    cli_sendBuffer(&cli,"Hallo Welt",sizeof("Hallo Welt"));
-    shelldebugprint("send message\n");
+    err = cli_sendBuffer(&cli,"Hallo Welt",sizeof("Hallo Welt"));
+    SHELLDEBUGPRINTF("send message err = %d\n",err);
     while(1)
     sleep(2);