diff --git a/contrib/win32/hg.bat b/contrib/win32/hg.bat
--- a/contrib/win32/hg.bat
+++ b/contrib/win32/hg.bat
@@ -15,3 +15,5 @@ if exist "%~dp0..\python.exe" (
     python "%~dp0hg" %*
 )
 endlocal
+
+exit /b %ERRORLEVEL%
diff --git a/tests/test-alias.t b/tests/test-alias.t
--- a/tests/test-alias.t
+++ b/tests/test-alias.t
@@ -525,3 +525,12 @@ return code of command and shell aliases
   [1]
   $ hg exit1
   [1]
+
+#if no-outer-repo
+  $ hg root
+  abort: no repository found in '$TESTTMP' (.hg not found)!
+  [255]
+  $ hg --config alias.hgroot='!hg root' hgroot
+  abort: no repository found in '$TESTTMP' (.hg not found)!
+  [255]
+#endif