Merge pull request #5690 from nicoddemus/custom-exit-code-docs

Mention pytest-custom_exit_code in the docs

Author: asottile

doc/en/usage.rst

@@ -39,6 +39,14 @@ They are represented by the :class:`_pytest.main.ExitCode` enum. The exit codes
 
     from pytest import ExitCode
 
+.. note::
+
+    If you would like to customize the exit code in some scenarios, specially when
+    no tests are collected, consider using the
+    `pytest-custom_exit_code <https://github.com/yashtodi94/pytest-custom_exit_code>`__
+    plugin.
+
+
 Getting help on version, option names, environment variables
 --------------------------------------------------------------