dev-python/proton-vpn-network-manager: use PYTEST_IGNORE to ignore failing tests

See-also: a931487cf9
Signed-off-by: Mattéo Rossillol‑‑Laruelle <beatussum@protonmail.com>

dev-python/proton-vpn-network-manager/proton-vpn-network-manager-0.12.13-r3.ebuild

@@ -42,11 +42,12 @@ distutils_enable_tests pytest
 
 src_prepare() {
 	distutils-r1_src_prepare
-
 	sed -i "/--cov/d" setup.cfg || die
-	rm tests/unit/core/test_networkmanager.py || die
 }
 
 python_test() {
+	# VPN connection cannot be tested within sandbox
+	local EPYTEST_IGNORE=( tests/unit/core/test_networkmanager.py )
+
 	XDG_RUNTIME_DIR="${T}/python_test" epytest
 }