diff --git a/IPython/frontend/linefrontendbase.py b/IPython/frontend/linefrontendbase.py
index 10443b9..c45e4be 100644
--- a/IPython/frontend/linefrontendbase.py
+++ b/IPython/frontend/linefrontendbase.py
@@ -216,6 +216,8 @@ class LineFrontEndBase(FrontEndBase):
         new_line, completions = self.complete(line)
         if len(completions)>1:
             self.write_completion(completions, new_line=new_line)
+        if not line == new_line:
+            self.input_buffer = new_line
         if self.debug:
             print >>sys.__stdout__, 'line', line
             print >>sys.__stdout__, 'new_line', new_line
diff --git a/IPython/testing/plugin/Makefile b/IPython/testing/plugin/Makefile
index 878946c..9d8157a 100644
--- a/IPython/testing/plugin/Makefile
+++ b/IPython/testing/plugin/Makefile
@@ -1,6 +1,5 @@
 # Set this prefix to where you want to install the plugin
-PREFIX=~/usr/local
-PREFIX=~/tmp/local
+PREFIX=/usr/local
 
 NOSE0=nosetests -vs --with-doctest --doctest-tests --detailed-errors
 NOSE=nosetests -vvs --with-ipdoctest --doctest-tests --doctest-extension=txt \