Testing and buildbots# Running and writing tests Running Unexpected skips Writing Benchmarks Silence warnings from the test suite Increase test coverage Common gotchas Measuring coverage Using coverage.py Install coverage Basic usage Branch coverage Coverage results for modules imported early on Using test.regrtest Filing the issue Measuring coverage of C code with gcov and lcov Working with buildbots In case of trouble Buildbot failures on pull requests Checking results of automatic builds Stability Flags-dependent failures Ordering-dependent failures Transient failures Custom builders New buildbot workers Preparing for buildbot worker setup Setting up the buildbot worker Conventional always-on machines Latent workers Buildbot worker operation Required ports Required resources Security considerations