Add stacklevel to deprecation warning and filter accordingly

IPython/lib/inputhook.py

@@ -658,7 +658,9 b' guis = inputhook_manager.guihooks'
 
 
 def _deprecated_disable():
-    warn("This function is deprecated since IPython 4.0 use disable_gui() instead", DeprecationWarning)
+    warn("This function is deprecated since IPython 4.0 use disable_gui() instead",
+            DeprecationWarning, stacklevel=2)
     inputhook_manager.disable_gui()
+    
 disable_wx = disable_qt4 = disable_gtk = disable_gtk3 = disable_glut = \
         disable_pyglet = disable_osx = _deprecated_disable

IPython/testing/iptest.py

@@ -53,6 +53,9 b" warnings.filterwarnings('error', message='.*make_label_dec', category=Deprecatio"
 warnings.filterwarnings('error', message='.*decorated_dummy.*', category=DeprecationWarning, module='.*')
 warnings.filterwarnings('error', message='.*skip_file_no_x11.*', category=DeprecationWarning, module='.*')
 warnings.filterwarnings('error', message='.*onlyif_any_cmd_exists.*', category=DeprecationWarning, module='.*')
+
+warnings.filterwarnings('error', message='.*disable_gui.*', category=DeprecationWarning, module='.*')
+
 if version_info < (6,):
     # nose.tools renames all things from `camelCase` to `snake_case` which raise an
     # warning with the runner they also import from standard import library. (as of Dec 2015)