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Diffstat (limited to 'doc/cmd.rst')
| -rw-r--r-- | doc/cmd.rst | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/doc/cmd.rst b/doc/cmd.rst index c1f52ee7..b86650a0 100644 --- a/doc/cmd.rst +++ b/doc/cmd.rst @@ -1057,6 +1057,7 @@ a comma-separated list of these options, or in the :ref:`config_run_debug` section of the .coveragerc file. The debug output goes to stderr, unless the ``COVERAGE_DEBUG_FILE`` environment -variable names a different file, which will be appended to. +variable names a different file, which will be appended to. This can be useful +because many test runners capture output, which could hide important details. ``COVERAGE_DEBUG_FILE`` accepts the special names ``stdout`` and ``stderr`` to write to those destinations. |