Index: lldb/trunk/unittests/Host/SocketTest.cpp
===================================================================
--- lldb/trunk/unittests/Host/SocketTest.cpp
+++ lldb/trunk/unittests/Host/SocketTest.cpp
@@ -179,7 +179,7 @@
       [=](const TCPSocket &s) {
         char connect_remote_address[64];
         snprintf(connect_remote_address, sizeof(connect_remote_address),
-                 "localhost:%u", s.GetLocalPortNumber());
+                 "127.0.0.1:%u", s.GetLocalPortNumber());
         return std::string(connect_remote_address);
       },
       &socket_a_up, &socket_b_up);
@@ -193,7 +193,7 @@
       [=](const TCPSocket &s) {
         char connect_remote_address[64];
         snprintf(connect_remote_address, sizeof(connect_remote_address),
-                 "localhost:%u", s.GetLocalPortNumber());
+                 "127.0.0.1:%u", s.GetLocalPortNumber());
         return std::string(connect_remote_address);
       },
       &socket_a_up, &socket_b_up);
Index: lldb/trunk/unittests/tools/lldb-server/tests/TestClient.cpp
===================================================================
--- lldb/trunk/unittests/tools/lldb-server/tests/TestClient.cpp
+++ lldb/trunk/unittests/tools/lldb-server/tests/TestClient.cpp
@@ -80,7 +80,7 @@
     return status.ToError();
 
   args.AppendArgument(
-      ("localhost:" + Twine(listen_socket.GetLocalPortNumber())).str());
+      ("127.0.0.1:" + Twine(listen_socket.GetLocalPortNumber())).str());
 
   for (StringRef arg : ServerArgs)
     args.AppendArgument(arg);