Readd warning at import time.

IPython/lib/inputhook.py

@@ -21,6 +21,11 b' from distutils.version import LooseVersion as V'
 
 from warnings import warn
 
+
+warn("`IPython.lib.inputhook` is deprecated since IPython 5.0 and will be removed in future versions.",
+        DeprecationWarning, stacklevel=2)
+
+
 #-----------------------------------------------------------------------------
 # Constants
 #-----------------------------------------------------------------------------

IPython/testing/iptest.py

@@ -364,9 +364,6 b' def run_iptest():'
     if '--with-xunit' in sys.argv and not hasattr(Xunit, 'orig_addError'):
         monkeypatch_xunit()
 
-    warnings.filterwarnings('ignore',
-        'This will be removed soon.  Use IPython.testing.util instead')
-    
     arg1 = sys.argv[1]
     if arg1 in test_sections:
         section = test_sections[arg1]