diff --git a/tests/cefclient/client_handler_gtk.cpp b/tests/cefclient/client_handler_gtk.cpp
index 5939032f6..e4782db50 100644
--- a/tests/cefclient/client_handler_gtk.cpp
+++ b/tests/cefclient/client_handler_gtk.cpp
@@ -53,7 +53,8 @@ void ClientHandler::OnTitleChange(CefRefPtr<CefBrowser> browser,
     Atom atoms[2];
     int result = XInternAtoms(display, const_cast<char**>(kAtoms), 2, false,
                               atoms);
-    ASSERT(result);
+    if (!result)
+      ASSERT(false);
 
     // Set the window title.
     XChangeProperty(display,