From d1f93f0d197414050516de7f0eb510ca52ff48d3 Mon Sep 17 00:00:00 2001
From: Marco Gorelli <33491632+MarcoGorelli@users.noreply.github.com>
Date: Thu, 9 Apr 2026 11:39:33 +0100
Subject: [PATCH 1/2] Type `pytest.approx`

---
 changelog/14373.improvement.rst | 1 +
 src/_pytest/python_api.py       | 7 ++++++-
 testing/python/approx.py        | 2 ++
 3 files changed, 9 insertions(+), 1 deletion(-)
 create mode 100644 changelog/14373.improvement.rst

diff --git a/changelog/14373.improvement.rst b/changelog/14373.improvement.rst
new file mode 100644
index 00000000000..bb9895c72fd
--- /dev/null
+++ b/changelog/14373.improvement.rst
@@ -0,0 +1 @@
+Added type annotations for ``pytest.approx``.
diff --git a/src/_pytest/python_api.py b/src/_pytest/python_api.py
index bab70aa4a8c..9e2e1826a4f 100644
--- a/src/_pytest/python_api.py
+++ b/src/_pytest/python_api.py
@@ -558,7 +558,12 @@ def __repr__(self) -> str:
         return f"{self.expected} ± {tol_str}"
 
 
-def approx(expected, rel=None, abs=None, nan_ok: bool = False) -> ApproxBase:
+def approx(
+    expected: Any,
+    rel: float | Decimal | None = None,
+    abs: float | Decimal | None = None,
+    nan_ok: bool = False,
+) -> ApproxBase:
     """Assert that two numbers (or two ordered sequences of numbers) are equal to each other
     within some tolerance.
 
diff --git a/testing/python/approx.py b/testing/python/approx.py
index 481df80565c..bfbb59fb61d 100644
--- a/testing/python/approx.py
+++ b/testing/python/approx.py
@@ -616,6 +616,8 @@ def test_decimal(self):
             assert a != approx(x, rel=Decimal("5e-7"), abs=0)
             assert approx(x, rel=Decimal("5e-6"), abs=0) == a
             assert approx(x, rel=Decimal("5e-7"), abs=0) != a
+            assert approx(x, rel=0, abs=Decimal("5e-3")) == a
+            assert approx(x, rel=0, abs=Decimal("5e-7")) != a
 
     def test_fraction(self):
         within_1e6 = [

From e4ec125a4644cd9ee6b3794daa290df1f3151e4c Mon Sep 17 00:00:00 2001
From: Ran Benita <ran@unusedvar.com>
Date: Fri, 10 Apr 2026 09:51:45 +0300
Subject: [PATCH 2/2] Update changelog/14373.improvement.rst

---
 changelog/14373.improvement.rst | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/changelog/14373.improvement.rst b/changelog/14373.improvement.rst
index bb9895c72fd..ea145f8b4a8 100644
--- a/changelog/14373.improvement.rst
+++ b/changelog/14373.improvement.rst
@@ -1 +1 @@
-Added type annotations for ``pytest.approx``.
+Added type annotations for :func:`pytest.approx`.