Is it possible to get the raw build log from a TeamCity build?

Is it possible to get the raw build log from a TeamCity build? I've written a custom test runner that gets run as a commandline build step and reports test results back by printing `##teamcity...` lines to stdout. The build log from TeamCity seems to be stripping these out when it recognises them. I'd like to see the raw output to help debug my test runner. Update: Apparently this simply isn't possible. neverov (I assume Dimitry Neverov of JetBrains?) has explained this and given a workaround so I've accepted his answer.