diff --git a/src/qgcunittest/MockMavlinkFileServer.cc b/src/qgcunittest/MockMavlinkFileServer.cc
index 65776119fcacd2e3dc61856bfe4a88f31e835679..9a3ec9f7710a8d439f1e8b3e1f94018d49fca677 100644
--- a/src/qgcunittest/MockMavlinkFileServer.cc
+++ b/src/qgcunittest/MockMavlinkFileServer.cc
@@ -97,6 +97,7 @@ void MockMavlinkFileServer::_openCommand(QGCUASFileManager::Request* request)
     
     size_t cchPath = strnlen((char *)request->data, sizeof(request->data));
     Q_ASSERT(cchPath != sizeof(request->data));
+    Q_UNUSED(connected); // Fix initialized-but-not-referenced warning on release builds
     path = (char *)request->data;
     
     // Check path against one of our known test cases
diff --git a/src/qgcunittest/TCPLoopBackServer.cc b/src/qgcunittest/TCPLoopBackServer.cc
index 0198ade158a8e3ffa2c8e22d971b15401c8e5232..d564eb8f33b0b683bfd02805b6d0b86f9788c4cd 100644
--- a/src/qgcunittest/TCPLoopBackServer.cc
+++ b/src/qgcunittest/TCPLoopBackServer.cc
@@ -45,6 +45,7 @@ void TCPLoopBackServer::run(void)
 
     bool connected = QObject::connect(_tcpServer, SIGNAL(newConnection()), this, SLOT(_newConnection()));
     Q_ASSERT(connected);
+    Q_UNUSED(connected); // Fix initialized-but-not-referenced warning on release builds
 
     Q_ASSERT(_tcpServer->listen(_hostAddress, _port));
 
@@ -59,6 +60,7 @@ void TCPLoopBackServer::_newConnection(void)
     Q_ASSERT(_tcpSocket);
     bool connected = QObject::connect(_tcpSocket, SIGNAL(readyRead()), this, SLOT(_readBytes()));
     Q_ASSERT(connected);
+    Q_UNUSED(connected); // Fix initialized-but-not-referenced warning on release builds
 }
 
 void TCPLoopBackServer::_readBytes(void)