Remove extra CI variable substitution

.gitlab-ci.yml

@@ -104,8 +104,6 @@ testinfra:
 
 certs:
   stage: health-test
-  variables:
-    OAS_DOMAIN: "$ADDRESS"
   allow_failure: true
   script:
     - mkdir ~/.ssh

test/README.md

@@ -10,7 +10,7 @@ Specify host manually:
 
 Run cert test manually using the ansible inventory file:
 
-    OAS_DOMAIN='example.openappstack.net' py.test -v -m 'certs' \
+    ADDRESS='example.openappstack.net' py.test -v -m 'certs' \
       --connection=ansible \
       --ansible-inventory=../ansible/inventory.yml \
       --hosts='ansible://*'
@@ -18,11 +18,11 @@ Run cert test manually using the ansible inventory file:
 Run cert test manually against a different cluster, not configured in any
 ansible inventory file, either by using pytest:
 
-    OAS_DOMAIN='example.openappstack.net' py.test -v -m 'certs'
+    ADDRESS='example.openappstack.net' py.test -v -m 'certs'
 
 or directly (allows better debugging since pytest won't eat stdout):
 
-    OAS_DOMAIN='example.openappstack.net' pytest/test_certs.py
+    ADDRESS='example.openappstack.net' pytest/test_certs.py
 
 ## Issues
 

test/pytest/test_certs.py

@@ -97,8 +97,8 @@ def valid_cert(domain: str, ca_file: str = '/tmp/custom_ca_bundle.crt'):
 
 @pytest.mark.certs
 def test_cert_validation(host):
-    domain = os.environ.get("OAS_DOMAIN")
-    assert domain, "Please export OAS_DOMAIN as environment variable."
+    domain = os.environ.get("ADDRESS")
+    assert domain, "Please export ADDRESS as environment variable."
 
     add_custom_cert_authorities(certifi.where(),
                                 ['pytest/le-staging-bundle.pem'])