diff --git a/src/metadata.yaml b/src/metadata.yaml
index c1b9789..57ef4e9 100644
--- a/src/metadata.yaml
+++ b/src/metadata.yaml
@@ -10,6 +10,7 @@ series:
   - xenial
   - bionic
   - cosmic
+  - disco
 subordinate: false
 extra-bindings:
   # Used to specify the OpenStack provider network interface
diff --git a/test-requirements.txt b/test-requirements.txt
index cd989d7..14b380e 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -1,15 +1,13 @@
+# This file is managed centrally.  If you find the need to modify this as a
+# one-off, please don't.  Intead, consult #openstack-charms and ask about
+# requirements management in charms via bot-control.  Thank you.
+#
 # Lint and unit test requirements
-flake8
+flake8>=2.2.4,<=2.4.1
 stestr>=2.2.0
 requests>=2.18.4
 charms.reactive
 mock>=1.2
 nose>=1.3.7
 coverage>=3.6
-git+https://github.com/openstack/charms.openstack.git#egg=charms-openstack
-netifaces   # vault
-hvac        # vault
-psycopg2    # vault
-tenacity    # vault
-pbr             # vault
-cryptography    # vault
+git+https://github.com/openstack/charms.openstack.git#egg=charms.openstack