From 645bbea221440dc5b7adb09c11780b17f7c1eef8 Mon Sep 17 00:00:00 2001
From: Ran Benita <ran@unusedvar.com>
Date: Tue, 17 Mar 2026 12:50:31 +0200
Subject: [PATCH] Remove `PytestRemovedIn9Warning`

Per our deprecation policy.

Fix #13893.
---
 doc/en/reference/reference.rst | 2 +-
 src/_pytest/warning_types.py   | 6 ------
 src/_pytest/warnings.py        | 3 ++-
 src/pytest/__init__.py         | 2 --
 testing/test_warnings.py       | 9 ++++-----
 5 files changed, 7 insertions(+), 15 deletions(-)

diff --git a/doc/en/reference/reference.rst b/doc/en/reference/reference.rst
index 644a687af53..4e5c7cfd644 100644
--- a/doc/en/reference/reference.rst
+++ b/doc/en/reference/reference.rst
@@ -1291,7 +1291,7 @@ Custom warnings generated in some situations such as improper usage or deprecate
 .. autoclass:: pytest.PytestReturnNotNoneWarning
   :show-inheritance:
 
-.. autoclass:: pytest.PytestRemovedIn9Warning
+.. autoclass:: pytest.PytestRemovedIn10Warning
   :show-inheritance:
 
 .. autoclass:: pytest.PytestUnknownMarkWarning
diff --git a/src/_pytest/warning_types.py b/src/_pytest/warning_types.py
index 93071b4a1b2..8fd62ff84b0 100644
--- a/src/_pytest/warning_types.py
+++ b/src/_pytest/warning_types.py
@@ -50,12 +50,6 @@ class PytestDeprecationWarning(PytestWarning, DeprecationWarning):
     __module__ = "pytest"
 
 
-class PytestRemovedIn9Warning(PytestDeprecationWarning):
-    """Warning class for features that will be removed in pytest 9."""
-
-    __module__ = "pytest"
-
-
 class PytestRemovedIn10Warning(PytestDeprecationWarning):
     """Warning class for features that will be removed in pytest 10."""
 
diff --git a/src/_pytest/warnings.py b/src/_pytest/warnings.py
index 1dbf0025a31..d599d6c27e6 100644
--- a/src/_pytest/warnings.py
+++ b/src/_pytest/warnings.py
@@ -41,7 +41,8 @@ def catch_warnings_for_item(
             warnings.filterwarnings("always", category=DeprecationWarning)
             warnings.filterwarnings("always", category=PendingDeprecationWarning)
 
-        warnings.filterwarnings("error", category=pytest.PytestRemovedIn9Warning)
+        # To be enabled in pytest 10.0.0.
+        # warnings.filterwarnings("error", category=pytest.PytestRemovedIn10Warning)
 
         apply_warning_filters(config_filters, cmdline_filters)
 
diff --git a/src/pytest/__init__.py b/src/pytest/__init__.py
index 3e6281ac388..d53edb93728 100644
--- a/src/pytest/__init__.py
+++ b/src/pytest/__init__.py
@@ -83,7 +83,6 @@
 from _pytest.warning_types import PytestDeprecationWarning
 from _pytest.warning_types import PytestExperimentalApiWarning
 from _pytest.warning_types import PytestFDWarning
-from _pytest.warning_types import PytestRemovedIn9Warning
 from _pytest.warning_types import PytestRemovedIn10Warning
 from _pytest.warning_types import PytestReturnNotNoneWarning
 from _pytest.warning_types import PytestUnhandledThreadExceptionWarning
@@ -135,7 +134,6 @@
     "PytestExperimentalApiWarning",
     "PytestFDWarning",
     "PytestPluginManager",
-    "PytestRemovedIn9Warning",
     "PytestRemovedIn10Warning",
     "PytestReturnNotNoneWarning",
     "PytestUnhandledThreadExceptionWarning",
diff --git a/testing/test_warnings.py b/testing/test_warnings.py
index e3221da7569..2625f0959e6 100644
--- a/testing/test_warnings.py
+++ b/testing/test_warnings.py
@@ -562,8 +562,7 @@ def test_invalid_regex_in_filterwarning(self, pytester: Pytester) -> None:
         )
 
 
-# In 9.1, uncomment below and change RemovedIn9 -> RemovedIn10.
-# @pytest.mark.skip("not relevant until pytest 10.0")
+@pytest.mark.skip("not relevant until pytest 10.0")
 @pytest.mark.parametrize("change_default", [None, "ini", "cmdline"])
 def test_removed_in_x_warning_as_error(pytester: Pytester, change_default) -> None:
     """This ensures that PytestRemovedInXWarnings raised by pytest are turned into errors.
@@ -575,7 +574,7 @@ def test_removed_in_x_warning_as_error(pytester: Pytester, change_default) -> No
         """
         import warnings, pytest
         def test():
-            warnings.warn(pytest.PytestRemovedIn9Warning("some warning"))
+            warnings.warn(pytest.PytestRemovedIn10Warning("some warning"))
     """
     )
     if change_default == "ini":
@@ -583,12 +582,12 @@ def test():
             """
             [pytest]
             filterwarnings =
-                ignore::pytest.PytestRemovedIn9Warning
+                ignore::pytest.PytestRemovedIn10Warning
         """
         )
 
     args = (
-        ("-Wignore::pytest.PytestRemovedIn9Warning",)
+        ("-Wignore::pytest.PytestRemovedIn10Warning",)
         if change_default == "cmdline"
         else ()
     )