From 47d7c14b45262ac9184d8151b7034add2226094b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=D0=9A=D0=B8=D1=80=D0=B8=D0=BB=D0=BB=20=D0=92=D0=B5=D1=82?=
 =?UTF-8?q?=D1=80=D0=BE=D0=B2?= <vetrovk@gmail.com>
Date: Mon, 13 Jul 2026 08:43:02 +0300
Subject: [PATCH 1/2] fix: unwrap fixture definitions for doctest locations

Co-authored-by: OpenAI Codex <noreply@openai.com>
---
 changelog/14700.bugfix.rst |  1 +
 src/_pytest/doctest.py     | 12 ++++++++++++
 testing/test_doctest.py    | 20 ++++++++++++++++++++
 3 files changed, 33 insertions(+)
 create mode 100644 changelog/14700.bugfix.rst

diff --git a/changelog/14700.bugfix.rst b/changelog/14700.bugfix.rst
new file mode 100644
index 00000000000..46847b59486
--- /dev/null
+++ b/changelog/14700.bugfix.rst
@@ -0,0 +1 @@
+Fixed an internal error on Python 3.12 when a doctest on a fixture-decorated function was skipped.
diff --git a/src/_pytest/doctest.py b/src/_pytest/doctest.py
index c5b8d09b09d..ea894b3f441 100644
--- a/src/_pytest/doctest.py
+++ b/src/_pytest/doctest.py
@@ -32,6 +32,7 @@
 from _pytest.config import Config
 from _pytest.config.argparsing import Parser
 from _pytest.fixtures import fixture
+from _pytest.fixtures import FixtureFunctionDefinition
 from _pytest.fixtures import TopRequest
 from _pytest.nodes import Collector
 from _pytest.nodes import Item
@@ -529,6 +530,17 @@ def _find_lineno(self, obj, source_lines):
                         obj,
                         source_lines,
                     )
+            elif py_ver_info_minor == (3, 12):
+
+                def _find_lineno(self, obj, source_lines):
+                    if isinstance(obj, FixtureFunctionDefinition):
+                        obj = inspect.unwrap(obj)
+
+                    # Type ignored because this is a private function.
+                    return super()._find_lineno(  # type:ignore[misc]
+                        obj,
+                        source_lines,
+                    )
 
             if sys.version_info < (3, 13):
 
diff --git a/testing/test_doctest.py b/testing/test_doctest.py
index 9c788d0fc41..cfeedf0566f 100644
--- a/testing/test_doctest.py
+++ b/testing/test_doctest.py
@@ -875,6 +875,26 @@ def foo(x):
         reportinfo = items[0].reportinfo()
         assert reportinfo[1] == 1
 
+    def test_fixture_doctest_skip_has_line_number(self, pytester: Pytester):
+        p = pytester.makepyfile(
+            test_fixture_doctest_skip="""
+            import pytest
+
+            @pytest.fixture
+            def unavailable():
+                '''
+                >>> getfixture("unavailable")
+                '''
+                pytest.skip("unavailable")
+            """
+        )
+        items, _reprec = pytester.inline_genitems(p, "--doctest-modules")
+        assert items[0].reportinfo()[1] is not None
+
+        result = pytester.runpytest(p, "--doctest-modules")
+        assert "INTERNALERROR" not in result.stdout.str()
+        result.assert_outcomes(skipped=1)
+
     def test_valid_setup_py(self, pytester: Pytester):
         """
         Test to make sure that pytest ignores valid setup.py files when ran

From 66d43e13db015fd0ea62e3de3bfdd15e8b52e65e Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=D0=9A=D0=B8=D1=80=D0=B8=D0=BB=D0=BB=20=D0=92=D0=B5=D1=82?=
 =?UTF-8?q?=D1=80=D0=BE=D0=B2?= <vetrovk@gmail.com>
Date: Mon, 13 Jul 2026 09:24:01 +0300
Subject: [PATCH 2/2] test: limit doctest fixture regression to Python 3.12

---
 testing/test_doctest.py | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/testing/test_doctest.py b/testing/test_doctest.py
index cfeedf0566f..835288a1a30 100644
--- a/testing/test_doctest.py
+++ b/testing/test_doctest.py
@@ -875,6 +875,9 @@ def foo(x):
         reportinfo = items[0].reportinfo()
         assert reportinfo[1] == 1
 
+    @pytest.mark.skipif(
+        sys.version_info < (3, 12), reason="requires Python 3.12 or later"
+    )
     def test_fixture_doctest_skip_has_line_number(self, pytester: Pytester):
         p = pytester.makepyfile(
             test_fixture_doctest_skip="""