diff --git a/IPython/terminal/embed.py b/IPython/terminal/embed.py
index d893c48..e69c86c 100644
--- a/IPython/terminal/embed.py
+++ b/IPython/terminal/embed.py
@@ -89,8 +89,7 @@ class InteractiveShellEmbed(TerminalInteractiveShell):
         
     
         if kw.get('user_global_ns', None) is not None:
-            warnings.warn("user_global_ns has been replaced by user_module. The\
-                           parameter will be ignored, and removed in IPython 5.0", DeprecationWarning)
+            raise DeprecationWarning("Key word argument `user_global_ns` has been replaced by `user_module` since IPython 4.0.")
 
         self._call_location_id =  kw.pop('_call_location_id', None)
 
diff --git a/IPython/utils/warn.py b/IPython/utils/warn.py
index eee175b..1b67423 100644
--- a/IPython/utils/warn.py
+++ b/IPython/utils/warn.py
@@ -11,7 +11,7 @@ from __future__ import print_function
 import sys
 import warnings
 
-warnings.warn("The module IPython.utils.warn is deprecated, use the standard warnings module instead", DeprecationWarning)
+warnings.warn("The module IPython.utils.warn is deprecated since IPython 4.0, use the standard warnings module instead", DeprecationWarning)
 
 def warn(msg,level=2,exit_val=1):
     """Standard warning printer. Gives formatting consistency.
@@ -30,7 +30,7 @@ def warn(msg,level=2,exit_val=1):
     -exit_val (1): exit value returned by sys.exit() for a level 4
     warning. Ignored for all other levels."""
     
-    warnings.warn("The module IPython.utils.warn is deprecated, use the standard warnings module instead", DeprecationWarning)
+    warnings.warn("The module IPython.utils.warn is deprecated since IPython 4.0, use the standard warnings module instead", DeprecationWarning)
     if level>0:
         header = ['','','WARNING: ','ERROR: ','FATAL ERROR: ']
         print(header[level], msg, sep='', file=sys.stderr)