dev-python/protobuf: Workaround py3.13 segv using pytest-forked

Signed-off-by: Michał Górny <mgorny@gentoo.org>

dev-python/protobuf/protobuf-6.31.1.ebuild

@@ -36,9 +36,11 @@ BDEPEND="
 		dev-libs/protobuf
 		dev-python/absl-py[${PYTHON_USEDEP}]
 		dev-python/numpy[${PYTHON_USEDEP}]
+		dev-python/pytest-forked[${PYTHON_USEDEP}]
 	)
 "
 
+EPYTEST_XDIST=1
 distutils_enable_tests pytest
 
 src_unpack() {
@@ -71,10 +73,6 @@ python_test() {
 				google/protobuf/internal/json_format_test.py
 			)
 			;;
-		python3.13)
-			# TODO: segfaults on exit
-			return
-			;;
 	esac
 
 	cp -r "${BUILD_DIR}"/{install,test} || die
@@ -141,5 +139,6 @@ python_test() {
 	done
 
 	local -x PYTEST_DISABLE_PLUGIN_AUTOLOAD=1
-	epytest
+	# pytest-forked prevents segfault on py3.13
+	epytest -p pytest_forked --forked
 }