tests: need to include unistd.h to get usleep.
diff --git a/tests/test-get-async.cpp b/tests/test-get-async.cpp
index d59d611..7f04d65 100644
--- a/tests/test-get-async.cpp
+++ b/tests/test-get-async.cpp
@@ -7,6 +7,7 @@
 #include <cstdlib>
 #include <sstream>
 #include <iostream>
+#include <unistd.h>
 #include <ndn-cpp/face.hpp>
 
 using namespace std;
@@ -47,7 +48,7 @@
 {
   try {
     // Connect to port 9695 until the testbed hubs use NDNx.
-    Face face("A.hub.ndn.ucla.edu", 9695);
+    Face face("C.hub.ndn.ucla.edu", 9695);
     
     // Counter holds data used by the callbacks.
     Counter counter;