These are from windows hosting test site and won't work as linux doesn't support aspx
Suspend-Go Error Codes to be tested
Comment Link
Test suspend-go with 403 captureTimeStamp403.aspx
Test suspend-go with 502 captureTimeStamp502.aspx
Test suspend-go with 503 captureTimeStamp503.aspx
Test suspend-go with 504 captureTimeStamp504.aspx

Similar error code tests for linux using php files. Not only - 403,502,503,504 returned by internal link (NOT external link, bug#119066), throws spider into delayed status