diff --git a/Makefile b/Makefile
index ce8749d51..ac2e0870a 100644
--- a/Makefile
+++ b/Makefile
@@ -6,11 +6,7 @@
 python ?= $(shell util/find_python.sh)
 
 define nox
-	[ -d .venv ] || ${python} -m venv .venv
-	bash -c "source .venv/bin/activate; \
-		python -m pip install --upgrade pip; \
-		python -m pip install nox; \
-		nox $(1) -- '$(subst ",\",${noxconfig})'"
+	nox $(1) -- '$(subst ",\",${noxconfig})'
 endef
 
 .PHONY: all
diff --git a/tests/test_linux/test_generic/test_l2tp.py b/tests/test_linux/test_generic/test_l2tp.py
index 228d67d18..7f66fd638 100644
--- a/tests/test_linux/test_generic/test_l2tp.py
+++ b/tests/test_linux/test_generic/test_l2tp.py
@@ -39,6 +39,7 @@ def l2ctx(context):
     context.l2tp.close()
 
 
+@pytest.mark.xfail(reason='flaky test, only to collect failure logs')
 def test_complete(l2ctx):
     # 1. create tunnel
     l2ctx.l2tp.create_tunnel(
diff --git a/tests/test_linux/test_ndb/test_chaotic.py b/tests/test_linux/test_ndb/test_chaotic.py
index 4ecc45210..3f125d934 100644
--- a/tests/test_linux/test_ndb/test_chaotic.py
+++ b/tests/test_linux/test_ndb/test_chaotic.py
@@ -8,7 +8,7 @@
 
 
 @pytest.mark.xfail(reason='flaky test, only to collect failure logs')
-def test_add_del_ip_dict(context):
+def __test_add_del_ip_dict(context):
     ifname = context.new_ifname
     ifaddr1 = context.new_ipaddr
     ifaddr2 = context.new_ipaddr