diff --git a/tox.ini b/tox.ini
index 68c235dbf..9ad7ed501 100644
--- a/tox.ini
+++ b/tox.ini
@@ -65,30 +65,46 @@ exclude = .venv,.git,.tox,dist,doc,*openstack/common*,*lib/python*,*egg,build,to
 import_exceptions = neutron.i18n
 local-check-factory = neutron.hacking.checks.factory
 
+# TODO(armax): due to bug #1515335, set TEMPEST_CONFIG_DIR in your
+# local env, like this:
+#
+# TEMPEST_CONFIG_DIR=/opt/stack/tempest/etc
+#
 [testenv:apiv1]
 sitepackages = True
 setenv =
  OS_TEST_PATH={toxinidir}/neutron_lbaas/tests/tempest/v1/api
  OS_TESTR_CONCURRENCY=1
- TEMPEST_CONFIG_DIR={env:TEMPEST_CONFIG_DIR:/opt/stack/tempest/etc}
 
+# TODO(armax): due to bug #1515335, set TEMPEST_CONFIG_DIR in your
+# local env, like this:
+#
+# TEMPEST_CONFIG_DIR=/opt/stack/tempest/etc
+#
 [testenv:apiv2]
 sitepackages = True
 setenv =
  OS_TEST_PATH={toxinidir}/neutron_lbaas/tests/tempest/v2/api
  OS_TESTR_CONCURRENCY=1
- TEMPEST_CONFIG_DIR={env:TEMPEST_CONFIG_DIR:/opt/stack/tempest/etc}
 
+# TODO(armax): due to bug #1515335, set TEMPEST_CONFIG_DIR in your
+# local env, like this:
+#
+# TEMPEST_CONFIG_DIR=/opt/stack/tempest/etc
+#
 [testenv:scenario]
 sitepackages = True
 setenv =
  OS_TEST_PATH={toxinidir}/neutron_lbaas/tests/tempest/v2/scenario
  OS_TESTR_CONCURRENCY=1
- TEMPEST_CONFIG_DIR={env:TEMPEST_CONFIG_DIR:/opt/stack/tempest/etc}
 
+# TODO(armax): due to bug #1515335, set TEMPEST_CONFIG_DIR in your
+# local env, like this:
+#
+# TEMPEST_CONFIG_DIR=/opt/stack/tempest/etc
+#
 [testenv:ddt]
 sitepackages = True
 setenv =
  OS_TEST_PATH={toxinidir}/neutron_lbaas/tests/tempest/v2/ddt
  OS_TESTR_CONCURRENCY=1
- TEMPEST_CONFIG_DIR={env:TEMPEST_CONFIG_DIR:/opt/stack/tempest/etc}