I have a Windows batch file (mytest.bat) that calls a Ruby script (mytest). The mytest.bat looks like this: ruby %TOOLDIR%\bin\mytest %* When the batch file is called using "call mytest" from another Ruby script, it is automatically converting the command-line arguments. Specifically, it is converting path arguments: mytest -i "\testdir\mytests\test.dat" becomes "/testdir/mytests/test.dat" I do not want Ruby converting these paths. It seems like it is going through each string argument, detecting that it is a path and normalizing/converting each path from Windows-style to UNIX-style. How do I stop Ruby from doing this?