The !-PathParser-! is used by the .NET !-FitServer-! to parse the path passed to it from [[!-FitNesse-!][.FitNesse]]. You can include a config file on the path, and .NET !-FitServer-! will use that config file during the test run. Try just one path entry... |path parser fixture| |path string|assembly paths?|config file path?| |c:\path\to\assembly.dll|c:\path\to\assembly.dll|null| Now two... |path parser fixture| |path string|assembly paths?|config file path?| |c:\path\to\assembly.dll;c:\path\to\other\assembly.dll|c:\path\to\assembly.dll,c:\path\to\other\assembly.dll|null| Now one assembly and one config file |path parser fixture| |path string|assembly paths?|config file path?| |c:\path\to\assembly.dll;c:\path\to\assembly.config|c:\path\to\assembly.dll|c:\path\to\assembly.config|