diff --git a/dev-python/tox/Manifest b/dev-python/tox/Manifest
index 497e4fc0a2508..05e0bdb6474a1 100644
--- a/dev-python/tox/Manifest
+++ b/dev-python/tox/Manifest
@@ -1,2 +1,3 @@
 DIST tox-4.26.0.tar.gz 197260 BLAKE2B be05b52e88e3a3d0484203cb893af25e6e6e6f3719cf9e8d5cecf5343e22382b86676345ce00219d599353330ade897f710daf4976e48c2d7277664094a263c9 SHA512 ad2e311cd63c45a079b8c230a2feb364270b7a8bcf44b626385f8e442c6683ae841b3f34417b504f927608685a254fef3767d832fb5cfcc324c9cbf6ff7ea997
 DIST tox-4.28.3.tar.gz 199617 BLAKE2B 4bccdf5e4202bb5ea27868ebbf9aadb9f9447a474540a7c41f2b960ef685c8ff7a273da5a920c998eff62cbea891170dc7f3a6b6f814149d37e69560902231d6 SHA512 149a303b3af65987f165e1237dc0f7591bc4970cbb8c5002b6bd927afafb3f76c748757f5b3014f754903b191587181148c17ca83fd1337b7e96bf0cd087bd2a
+DIST tox-4.28.4.tar.gz 199692 BLAKE2B 0cefd242537cf1f8bd29dac7d3b2553c019b9878d9abbd8388047f6b276287996274f4957ec541e814d5db175784d25ad4e56605d962b9646b66b1e37b13e51b SHA512 f1f19cb41f54a63036cb32e4f4e8ee281b687f71b8baab9cd0d06287af52e84a75eca99a27b5b450105753c1a31cc9b2a53c8cff8e60878a93275dfaf42c94c0
diff --git a/dev-python/tox/tox-4.28.4.ebuild b/dev-python/tox/tox-4.28.4.ebuild
new file mode 100644
index 0000000000000..161d8f890141b
--- /dev/null
+++ b/dev-python/tox/tox-4.28.4.ebuild
@@ -0,0 +1,89 @@
+# Copyright 1999-2025 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+DISTUTILS_USE_PEP517=hatchling
+PYTHON_COMPAT=( python3_{11..14} pypy3_11 )
+
+inherit distutils-r1 pypi
+
+DESCRIPTION="virtualenv-based automation of test activities"
+HOMEPAGE="
+	https://tox.readthedocs.io/
+	https://github.com/tox-dev/tox/
+	https://pypi.org/project/tox/
+"
+
+LICENSE="MIT"
+SLOT="0"
+KEYWORDS="~alpha ~amd64 ~arm ~arm64 ~hppa ~loong ~mips ~ppc ~ppc64 ~riscv ~s390 ~sparc ~x86"
+
+RDEPEND="
+	dev-python/cachetools[${PYTHON_USEDEP}]
+	dev-python/chardet[${PYTHON_USEDEP}]
+	dev-python/colorama[${PYTHON_USEDEP}]
+	dev-python/filelock[${PYTHON_USEDEP}]
+	dev-python/packaging[${PYTHON_USEDEP}]
+	dev-python/platformdirs[${PYTHON_USEDEP}]
+	dev-python/pluggy[${PYTHON_USEDEP}]
+	dev-python/pyproject-api[${PYTHON_USEDEP}]
+	dev-python/virtualenv[${PYTHON_USEDEP}]
+"
+BDEPEND="
+	dev-python/hatch-vcs[${PYTHON_USEDEP}]
+	test? (
+		dev-python/build[${PYTHON_USEDEP}]
+		dev-python/distlib[${PYTHON_USEDEP}]
+		dev-python/psutil[${PYTHON_USEDEP}]
+		dev-python/re-assert[${PYTHON_USEDEP}]
+		$(python_gen_cond_dep '
+			dev-python/time-machine[${PYTHON_USEDEP}]
+		' 'python*')
+	)
+"
+
+EPYTEST_PLUGINS=( pytest-{mock,rerunfailures,xdist} )
+distutils_enable_tests pytest
+
+src_prepare() {
+	# upstream lower bounds are meaningless
+	sed -i -e 's:>=[0-9.]*::' pyproject.toml || die
+	distutils-r1_src_prepare
+}
+
+python_test() {
+	# devpi_process is not packaged, and has lots of dependencies
+	cat > "${T}"/devpi_process.py <<-EOF || die
+		def IndexServer(*args, **kwargs): raise NotImplementedError()
+	EOF
+
+	local -x PYTHONPATH=${T}:${PYTHONPATH}
+	local EPYTEST_DESELECT=(
+		# Internet
+		tests/tox_env/python/virtual_env/package/test_package_cmd_builder.py::test_build_wheel_external
+		tests/tox_env/python/virtual_env/package/test_package_cmd_builder.py::test_run_installpkg_targz
+	)
+	local EPYTEST_IGNORE=(
+		# requires devpi*
+		tests/test_provision.py
+	)
+
+	case ${EPYTHON} in
+		python*)
+			local EPYTEST_PLUGINS=( "${EPYTEST_PLUGINS[@]}" time-machine )
+			;;
+		pypy3*)
+			EPYTEST_DESELECT+=(
+				'tests/tox_env/python/pip/test_pip_install.py::test_constrain_package_deps[explicit-True-True]'
+				'tests/tox_env/python/pip/test_pip_install.py::test_constrain_package_deps[requirements-True-True]'
+				'tests/tox_env/python/pip/test_pip_install.py::test_constrain_package_deps[constraints-True-True]'
+				'tests/tox_env/python/pip/test_pip_install.py::test_constrain_package_deps[explicit+requirements-True-True]'
+				'tests/tox_env/python/pip/test_pip_install.py::test_constrain_package_deps[requirements_indirect-True-True]'
+				'tests/tox_env/python/pip/test_pip_install.py::test_constrain_package_deps[requirements_constraints_indirect-True-True]'
+			)
+			;;
+	esac
+
+	epytest -o addopts=
+}