From c6d1c7f80e3a47159202c8ce86aba233d2a1c5d3 Mon Sep 17 00:00:00 2001
From: ferkans-amir <amir.rezaei@tu-berlin.de>
Date: Tue, 28 Jul 2026 10:23:10 +0200
Subject: [PATCH 1/2] fix(mark): handle non-tuple non-list values in
 ParameterSet.extract_from

---
 src/_pytest/mark/structures.py | 9 +++------
 1 file changed, 3 insertions(+), 6 deletions(-)

diff --git a/src/_pytest/mark/structures.py b/src/_pytest/mark/structures.py
index 5449b17a1c6..488ceebc0a2 100644
--- a/src/_pytest/mark/structures.py
+++ b/src/_pytest/mark/structures.py
@@ -154,13 +154,10 @@ def extract_from(
             return parameterset
         if force_tuple:
             return cls.param(parameterset)
+        elif isinstance(parameterset, (tuple, list)):
+            return cls(parameterset, marks=[], id=None)
         else:
-            # TODO: Refactor to fix this type-ignore. Currently the following
-            # passes type-checking but crashes:
-            #
-            #   @pytest.mark.parametrize(('x', 'y'), [1, 2])
-            #   def test_foo(x, y): pass
-            return cls(parameterset, marks=[], id=None)  # type: ignore[arg-type]
+            return cls((parameterset,), marks=[], id=None)
 
     @staticmethod
     def _parse_parametrize_args(

From 6eac83839c2f465d8b281d3de821bb2703f8cecd Mon Sep 17 00:00:00 2001
From: ferkans-amir <amir.rezaei@tu-berlin.de>
Date: Tue, 28 Jul 2026 15:27:40 +0200
Subject: [PATCH 2/2] changelog: add newsfragment for #14795

---
 changelog/14795.bugfix.rst | 1 +
 1 file changed, 1 insertion(+)
 create mode 100644 changelog/14795.bugfix.rst

diff --git a/changelog/14795.bugfix.rst b/changelog/14795.bugfix.rst
new file mode 100644
index 00000000000..337e6727655
--- /dev/null
+++ b/changelog/14795.bugfix.rst
@@ -0,0 +1 @@
+Handle non-tuple and non-list parameter items cleanly in :meth:`ParameterSet.extract_from` when single parameter names use trailing commas in :func:`pytest.mark.parametrize`.