diff --git a/.travis.yml b/.travis.yml
index ed1b44de..34fe24fc 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -86,7 +86,7 @@ script:
   - ./animate-bmp
   - ./audio_player
   - ./background-effects
-  #- ./calculator 
+  - ./calculator 
   - ./categ
   - ./clicked
   - ./decore
diff --git a/source/gui/detail/window_manager.cpp b/source/gui/detail/window_manager.cpp
index f685c83b..0af79eb8 100644
--- a/source/gui/detail/window_manager.cpp
+++ b/source/gui/detail/window_manager.cpp
@@ -23,8 +23,6 @@
 #include <stdexcept>
 #include <algorithm>
 
-#include <iostream> //debug travis
-
 namespace nana
 {
 
@@ -94,9 +92,7 @@ namespace detail
 			{
 				void operator()(basic_window* wd) const
 				{
-					std::cout << "delete basic_window " << wd <<"  category="<<static_cast<int>(wd->other.category)<< std::endl;
 					delete wd;
-					std::cout << "  delete successfully" << std::endl;
 				}
 			};