npm test error

# testing in C:\DOCUME~1\Matteo\IMPOST~1\Temp\npm-test-600
# global prefix = C:\DOCUME~1\Matteo\IMPOST~1\Temp\npm-test-600\root

+node "C:\Programmi\nodejs\node_modules\npm\bin\npm-cli.js" install "C:\Programmi\nodejs\node_modules\npm"
$$$$$$ cd C:\DOCUME~1\Matteo\IMPOST~1\Temp\npm-test-600\root; PATH=C:\Programmi\nodejs;C:\DOCUME~1\Matteo\IMPOST~1\Temp\
npm-test-600\root;c:\DOCUME~1\Matteo\IMPOST~1\Temp\npm-test-600\root\node_modules\.bin;C:\Programmi\Heroku\ruby-1.9.3\bi
n;C:\imagemagick;C:\Python27\;C:\Python27\Scripts;C:\Programmi\Eazfuscator.NET;C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS
\System32\Wbem;C:\Programmi\IDM Computer Solutions\UltraEdit-32;C:\Programmi\ATI Technologies\ATI Control Panel;C:\Progr
ammi\ATI Technologies\ATI.ACE\Core-Static;C:\VXIPNP\WinNT\Bin;C:\Programmi\Git\cmd;C:\Programmi\Heroku\bin;C:\Programmi\
git\cmd;C:\Programmi\nodejs\;%APPDATA%\Python\Scripts;C:\FreePascal\bin\i386-Win32;C:\Documents and Settings\Matteo\Dati
 applicazioni\npm "C:\Programmi\nodejs\node.exe" "C:\Programmi\nodejs\node_modules\npm\bin\npm-cli.js" install "C:\Progr
ammi\nodejs\node_modules\npm"
$$$$$$ after command "C:\Programmi\nodejs\node.exe" "C:\Programmi\nodejs\node_modules\npm\bin\npm-cli.js" install "C:\Pr
ogrammi\nodejs\node_modules\npm" C:\DOCUME~1\Matteo\IMPOST~1\Temp\npm-test-600\root
not ok 1 node "C:\Programmi\nodejs\node_modules\npm\bin\npm-cli.js" install "C:\Programmi\nodejs\node_modules\npm"
1..1
C:\Programmi\nodejs\node_modules\npm\test\run.js:192
  if (er) throw er
                ^
Error: failed node "C:\Programmi\nodejs\node_modules\npm\bin\npm-cli.js" install "C:\Programmi\nodejs\node_modules\npm"
    at C:\Programmi\nodejs\node_modules\npm\test\run.js:102:10
    at ChildProcess.exithandler (child_process.js:739:5)
    at ChildProcess.emit (events.js:110:17)
    at maybeClose (child_process.js:1000:16)
    at Process.ChildProcess._handle.onexit (child_process.js:1072:5)