diff --git a/dev-python/parameterized/files/parameterized-0.9.0-py312-test.patch b/dev-python/parameterized/files/parameterized-0.9.0-py312-test.patch
new file mode 100644
index 0000000000000..457cd58da75c9
--- /dev/null
+++ b/dev-python/parameterized/files/parameterized-0.9.0-py312-test.patch
@@ -0,0 +1,17 @@
+Remove the usage of assertRaisesRegexp unit test alias removed in Python 3.12
+
+Upstream-PR: https://github.com/wolever/parameterized/pull/169
+
+diff --git a/parameterized/test.py b/parameterized/test.py
+index 6c71f79..498c591 100644
+--- a/parameterized/test.py
++++ b/parameterized/test.py
+@@ -35,7 +35,7 @@ def assert_raises_regexp_decorator(expected_exception, expected_regexp):
+     def func_decorator(func):
+         @wraps(func)
+         def wrapper(self, *args, **kwargs):
+-            with self.assertRaisesRegexp(expected_exception, expected_regexp):
++            with self.assertRaisesRegex(expected_exception, expected_regexp):
+                 func(self, *args, **kwargs)
+ 
+         return wrapper
diff --git a/dev-python/parameterized/parameterized-0.9.0.ebuild b/dev-python/parameterized/parameterized-0.9.0.ebuild
index cdcdc7bff151f..5ba5013e9c36b 100644
--- a/dev-python/parameterized/parameterized-0.9.0.ebuild
+++ b/dev-python/parameterized/parameterized-0.9.0.ebuild
@@ -4,7 +4,7 @@
 EAPI=8
 
 DISTUTILS_USE_PEP517=setuptools
-PYTHON_COMPAT=( pypy3 python3_{9..11} )
+PYTHON_COMPAT=( pypy3 python3_{10..12} )
 
 inherit distutils-r1 pypi
 
@@ -24,4 +24,8 @@ BDEPEND="
 	)
 "
 
+PATCHES=(
+	"${FILESDIR}/${P}-py312-test.patch"
+)
+
 distutils_enable_tests unittest