diff --git a/changelog/10196.trivial.rst b/changelog/10196.trivial.rst
index 723dc3e0b..edf458f84 100644
--- a/changelog/10196.trivial.rst
+++ b/changelog/10196.trivial.rst
@@ -1 +1 @@
- make PytestReturnNotNoneWarning a RemovedIn8Warning
+:class:`~pytest.PytestReturnNotNoneWarning` is now a subclass of :class:`~pytest.PytestRemovedIn8Warning`: the plan is to make returning non-``None`` from tests an error in the future.
diff --git a/doc/en/reference/reference.rst b/doc/en/reference/reference.rst
index bdad8fa59..9e7589025 100644
--- a/doc/en/reference/reference.rst
+++ b/doc/en/reference/reference.rst
@@ -1133,6 +1133,9 @@ Custom warnings generated in some situations such as improper usage or deprecate
 .. autoclass:: pytest.PytestReturnNotNoneWarning
   :show-inheritance:
 
+.. autoclass:: pytest.PytestRemovedIn8Warning
+  :show-inheritance:
+
 .. autoclass:: pytest.PytestUnhandledCoroutineWarning
    :show-inheritance: