diff --git a/src/postorius/tests/fixtures/vcr_cassettes/test_list_members_add_owner.yaml b/src/postorius/tests/fixtures/vcr_cassettes/test_list_members_add_owner.yaml
deleted file mode 100644
index 1cc54b2..0000000
--- a/src/postorius/tests/fixtures/vcr_cassettes/test_list_members_add_owner.yaml
+++ /dev/null
@@ -1,151 +0,0 @@
-interactions:
-- request:
-    body: mail_host=example.com
-    headers:
-      accept-encoding: ['gzip, deflate']
-      !!python/unicode 'content-type': [!!python/unicode 'application/x-www-form-urlencoded']
-    method: !!python/unicode 'POST'
-    uri: http://localhost:9001/3.0/domains
-  response:
-    body: {string: !!python/unicode ''}
-    headers:
-      content-length: ['0']
-      location: ['http://localhost:9001/3.0/domains/example.com']
-    status: {code: 201, message: Created}
-- request:
-    body: null
-    headers:
-      accept-encoding: ['gzip, deflate']
-    method: !!python/unicode 'GET'
-    uri: http://localhost:9001/3.0/domains/example.com
-  response:
-    body: {string: !!python/unicode '{"base_url": "http://example.com", "description":
-        null, "http_etag": "\"e736411818ff1815ca83575e0958c38c5188f0a4\"", "mail_host":
-        "example.com", "self_link": "http://localhost:9001/3.0/domains/example.com",
-        "url_host": "example.com"}'}
-    headers:
-      content-length: ['233']
-      content-type: [application/json; charset=utf-8]
-    status: {code: 200, message: OK}
-- request:
-    body: fqdn_listname=foo%40example.com
-    headers:
-      accept-encoding: ['gzip, deflate']
-      !!python/unicode 'content-type': [!!python/unicode 'application/x-www-form-urlencoded']
-    method: !!python/unicode 'POST'
-    uri: http://localhost:9001/3.0/lists
-  response:
-    body: {string: !!python/unicode ''}
-    headers:
-      content-length: ['0']
-      location: ['http://localhost:9001/3.0/lists/foo.example.com']
-    status: {code: 201, message: Created}
-- request:
-    body: null
-    headers:
-      accept-encoding: ['gzip, deflate']
-    method: !!python/unicode 'GET'
-    uri: http://localhost:9001/3.0/lists/foo.example.com
-  response:
-    body: {string: !!python/unicode '{"display_name": "Foo", "fqdn_listname": "foo@example.com",
-        "http_etag": "\"698a819bbb6b902096a8c5543cc7fac2328960d5\"", "list_id": "foo.example.com",
-        "list_name": "foo", "mail_host": "example.com", "member_count": 0, "self_link":
-        "http://localhost:9001/3.0/lists/foo.example.com", "volume": 1}'}
-    headers:
-      content-length: ['294']
-      content-type: [application/json; charset=utf-8]
-    status: {code: 200, message: OK}
-- request:
-    body: null
-    headers:
-      accept-encoding: ['gzip, deflate']
-    method: !!python/unicode 'DELETE'
-    uri: http://localhost:9001/3.0/lists/foo@example.com
-  response:
-    body: {string: !!python/unicode ''}
-    headers:
-      content-length: ['0']
-    status: {code: 204, message: No Content}
-- request:
-    body: mail_host=example.com
-    headers:
-      accept-encoding: ['gzip, deflate']
-      !!python/unicode 'content-type': [!!python/unicode 'application/x-www-form-urlencoded']
-    method: !!python/unicode 'POST'
-    uri: http://localhost:9001/3.0/domains
-  response:
-    body: {string: !!python/unicode 'Duplicate email host: example.com'}
-    headers:
-      content-length: ['33']
-      content-type: [application/json; charset=utf-8]
-    status: {code: 400, message: Bad Request}
-- request:
-    body: null
-    headers:
-      accept-encoding: ['gzip, deflate']
-    method: !!python/unicode 'GET'
-    uri: http://localhost:9001/3.0/domains/example.com
-  response:
-    body: {string: !!python/unicode '{"base_url": "http://example.com", "description":
-        null, "http_etag": "\"e736411818ff1815ca83575e0958c38c5188f0a4\"", "mail_host":
-        "example.com", "self_link": "http://localhost:9001/3.0/domains/example.com",
-        "url_host": "example.com"}'}
-    headers:
-      content-length: ['233']
-      content-type: [application/json; charset=utf-8]
-    status: {code: 200, message: OK}
-- request:
-    body: null
-    headers:
-      accept-encoding: ['gzip, deflate']
-    method: !!python/unicode 'GET'
-    uri: http://localhost:9001/3.0/domains/example.com
-  response:
-    body: {string: !!python/unicode '{"base_url": "http://example.com", "description":
-        null, "http_etag": "\"e736411818ff1815ca83575e0958c38c5188f0a4\"", "mail_host":
-        "example.com", "self_link": "http://localhost:9001/3.0/domains/example.com",
-        "url_host": "example.com"}'}
-    headers:
-      content-length: ['233']
-      content-type: [application/json; charset=utf-8]
-    status: {code: 200, message: OK}
-- request:
-    body: fqdn_listname=foo%40example.com
-    headers:
-      accept-encoding: ['gzip, deflate']
-      !!python/unicode 'content-type': [!!python/unicode 'application/x-www-form-urlencoded']
-    method: !!python/unicode 'POST'
-    uri: http://localhost:9001/3.0/lists
-  response:
-    body: {string: !!python/unicode ''}
-    headers:
-      content-length: ['0']
-      location: ['http://localhost:9001/3.0/lists/foo.example.com']
-    status: {code: 201, message: Created}
-- request:
-    body: null
-    headers:
-      accept-encoding: ['gzip, deflate']
-    method: !!python/unicode 'GET'
-    uri: http://localhost:9001/3.0/lists/foo.example.com
-  response:
-    body: {string: !!python/unicode '{"display_name": "Foo", "fqdn_listname": "foo@example.com",
-        "http_etag": "\"698a819bbb6b902096a8c5543cc7fac2328960d5\"", "list_id": "foo.example.com",
-        "list_name": "foo", "mail_host": "example.com", "member_count": 0, "self_link":
-        "http://localhost:9001/3.0/lists/foo.example.com", "volume": 1}'}
-    headers:
-      content-length: ['294']
-      content-type: [application/json; charset=utf-8]
-    status: {code: 200, message: OK}
-- request:
-    body: null
-    headers:
-      accept-encoding: ['gzip, deflate']
-    method: !!python/unicode 'DELETE'
-    uri: http://localhost:9001/3.0/lists/foo@example.com
-  response:
-    body: {string: !!python/unicode ''}
-    headers:
-      content-length: ['0']
-    status: {code: 204, message: No Content}
-version: 1
diff --git a/src/postorius/tests/fixtures/vcr_cassettes/test_list_members_add_owner_by_owner.yaml b/src/postorius/tests/fixtures/vcr_cassettes/test_list_members_add_owner_by_owner.yaml
deleted file mode 100644
index 8dbe3c0..0000000
--- a/src/postorius/tests/fixtures/vcr_cassettes/test_list_members_add_owner_by_owner.yaml
+++ /dev/null
@@ -1,502 +0,0 @@
-interactions:
-- request:
-    body: null
-    headers:
-      accept-encoding: ['gzip, deflate']
-    method: !!python/unicode 'GET'
-    uri: http://localhost:9001/3.0/lists/foo@example.com
-  response:
-    body: {string: !!python/unicode '{"display_name": "Foo", "fqdn_listname": "foo@example.com",
-        "http_etag": "\"698a819bbb6b902096a8c5543cc7fac2328960d5\"", "list_id": "foo.example.com",
-        "list_name": "foo", "mail_host": "example.com", "member_count": 0, "self_link":
-        "http://localhost:9001/3.0/lists/foo.example.com", "volume": 1}'}
-    headers:
-      content-length: ['294']
-      content-type: [application/json; charset=utf-8]
-    status: {code: 200, message: OK}
-- request:
-    body: subscriber=su%40example.com&role=owner&list_id=foo.example.com
-    headers:
-      accept-encoding: ['gzip, deflate']
-      !!python/unicode 'content-type': [!!python/unicode 'application/x-www-form-urlencoded']
-    method: !!python/unicode 'POST'
-    uri: http://localhost:9001/3.0/members
-  response:
-    body: {string: !!python/unicode ''}
-    headers:
-      content-length: ['0']
-      location: ['http://localhost:9001/3.0/members/2']
-    status: {code: 201, message: Created}
-- request:
-    body: null
-    headers:
-      accept-encoding: ['gzip, deflate']
-    method: !!python/unicode 'GET'
-    uri: http://localhost:9001/3.0/lists/foo.example.com/roster/owner
-  response:
-    body: {string: !!python/unicode '{"entries": [{"address": "http://localhost:9001/3.0/addresses/su@example.com",
-        "delivery_mode": "regular", "email": "su@example.com", "http_etag": "\"50eebd88044b56c4a2073d93c0bf5c5da54f9b3c\"",
-        "list_id": "foo.example.com", "member_id": 2, "role": "owner", "self_link":
-        "http://localhost:9001/3.0/members/2", "user": "http://localhost:9001/3.0/users/2"}],
-        "http_etag": "\"902cfc083f243f174e2457cc0b5ef0e669c1cae3\"", "start": 0, "total_size":
-        1}'}
-    headers:
-      content-length: ['446']
-      content-type: [application/json; charset=utf-8]
-    status: {code: 200, message: OK}
-- request:
-    body: null
-    headers:
-      accept-encoding: ['gzip, deflate']
-    method: !!python/unicode 'GET'
-    uri: http://localhost:9001/3.0/lists/foo@example.com
-  response:
-    body: {string: !!python/unicode '{"display_name": "Foo", "fqdn_listname": "foo@example.com",
-        "http_etag": "\"698a819bbb6b902096a8c5543cc7fac2328960d5\"", "list_id": "foo.example.com",
-        "list_name": "foo", "mail_host": "example.com", "member_count": 0, "self_link":
-        "http://localhost:9001/3.0/lists/foo.example.com", "volume": 1}'}
-    headers:
-      content-length: ['294']
-      content-type: [application/json; charset=utf-8]
-    status: {code: 200, message: OK}
-- request:
-    body: null
-    headers:
-      accept-encoding: ['gzip, deflate']
-    method: !!python/unicode 'GET'
-    uri: http://localhost:9001/3.0/users/su@example.com
-  response:
-    body: {string: !!python/unicode '{"created_on": "2005-08-01T07:49:23", "http_etag":
-        "\"b36f8ca1d91d583901c768dc116815282d469c66\"", "is_server_owner": false,
-        "self_link": "http://localhost:9001/3.0/users/2", "user_id": 2}'}
-    headers:
-      content-length: ['188']
-      content-type: [application/json; charset=utf-8]
-    status: {code: 200, message: OK}
-- request:
-    body: null
-    headers:
-      accept-encoding: ['gzip, deflate']
-    method: !!python/unicode 'GET'
-    uri: http://localhost:9001/3.0/users/2/addresses
-  response:
-    body: {string: !!python/unicode '{"entries": [{"email": "su@example.com", "http_etag":
-        "\"a8988d233ad4b9e8641ad5d75553912565efec83\"", "original_email": "su@example.com",
-        "registered_on": "2005-08-01T07:49:23", "self_link": "http://localhost:9001/3.0/addresses/su@example.com",
-        "user": "http://localhost:9001/3.0/users/2"}], "http_etag": "\"7cc723891821fbf8b0974c2ec407cca11fbb6726\"",
-        "start": 0, "total_size": 1}'}
-    headers:
-      content-length: ['381']
-      content-type: [application/json; charset=utf-8]
-    status: {code: 200, message: OK}
-- request:
-    body: null
-    headers:
-      accept-encoding: ['gzip, deflate']
-    method: !!python/unicode 'GET'
-    uri: http://localhost:9001/3.0/addresses/su@example.com
-  response:
-    body: {string: !!python/unicode '{"email": "su@example.com", "http_etag": "\"a8988d233ad4b9e8641ad5d75553912565efec83\"",
-        "original_email": "su@example.com", "registered_on": "2005-08-01T07:49:23",
-        "self_link": "http://localhost:9001/3.0/addresses/su@example.com", "user":
-        "http://localhost:9001/3.0/users/2"}'}
-    headers:
-      content-length: ['276']
-      content-type: [application/json; charset=utf-8]
-    status: {code: 200, message: OK}
-- request:
-    body: null
-    headers:
-      accept-encoding: ['gzip, deflate']
-    method: !!python/unicode 'GET'
-    uri: http://localhost:9001/3.0/lists/foo.example.com/roster/owner
-  response:
-    body: {string: !!python/unicode '{"entries": [{"address": "http://localhost:9001/3.0/addresses/su@example.com",
-        "delivery_mode": "regular", "email": "su@example.com", "http_etag": "\"50eebd88044b56c4a2073d93c0bf5c5da54f9b3c\"",
-        "list_id": "foo.example.com", "member_id": 2, "role": "owner", "self_link":
-        "http://localhost:9001/3.0/members/2", "user": "http://localhost:9001/3.0/users/2"}],
-        "http_etag": "\"902cfc083f243f174e2457cc0b5ef0e669c1cae3\"", "start": 0, "total_size":
-        1}'}
-    headers:
-      content-length: ['446']
-      content-type: [application/json; charset=utf-8]
-    status: {code: 200, message: OK}
-- request:
-    body: null
-    headers:
-      accept-encoding: ['gzip, deflate']
-    method: !!python/unicode 'GET'
-    uri: http://localhost:9001/3.0/lists/foo.example.com/roster/moderator
-  response:
-    body: {string: !!python/unicode '{"http_etag": "\"32223434a0f3af4cdc4673d1fbc5bac1f6d98fd3\"",
-        "start": 0, "total_size": 0}'}
-    headers:
-      content-length: ['90']
-      content-type: [application/json; charset=utf-8]
-    status: {code: 200, message: OK}
-- request:
-    body: subscriber=newowner%40example.com&role=owner&list_id=foo.example.com
-    headers:
-      accept-encoding: ['gzip, deflate']
-      !!python/unicode 'content-type': [!!python/unicode 'application/x-www-form-urlencoded']
-    method: !!python/unicode 'POST'
-    uri: http://localhost:9001/3.0/members
-  response:
-    body: {string: !!python/unicode ''}
-    headers:
-      content-length: ['0']
-      location: ['http://localhost:9001/3.0/members/3']
-    status: {code: 201, message: Created}
-- request:
-    body: null
-    headers:
-      accept-encoding: ['gzip, deflate']
-    method: !!python/unicode 'GET'
-    uri: http://localhost:9001/3.0/lists/foo@example.com/roster/member?count=1&page=1
-  response:
-    body: {string: !!python/unicode '{"http_etag": "\"32223434a0f3af4cdc4673d1fbc5bac1f6d98fd3\"",
-        "start": 0, "total_size": 0}'}
-    headers:
-      content-length: ['90']
-      content-type: [application/json; charset=utf-8]
-    status: {code: 200, message: OK}
-- request:
-    body: null
-    headers:
-      accept-encoding: ['gzip, deflate']
-    method: !!python/unicode 'GET'
-    uri: http://localhost:9001/3.0/lists/foo@example.com/roster/member?count=25&page=1
-  response:
-    body: {string: !!python/unicode '{"http_etag": "\"32223434a0f3af4cdc4673d1fbc5bac1f6d98fd3\"",
-        "start": 0, "total_size": 0}'}
-    headers:
-      content-length: ['90']
-      content-type: [application/json; charset=utf-8]
-    status: {code: 200, message: OK}
-- request:
-    body: null
-    headers:
-      accept-encoding: ['gzip, deflate']
-    method: !!python/unicode 'GET'
-    uri: http://localhost:9001/3.0/lists/foo.example.com/roster/owner
-  response:
-    body: {string: !!python/unicode '{"entries": [{"address": "http://localhost:9001/3.0/addresses/newowner@example.com",
-        "delivery_mode": "regular", "email": "newowner@example.com", "http_etag":
-        "\"0a19a1b74530e9a6e79d0164fd3504f7b06cd5bd\"", "list_id": "foo.example.com",
-        "member_id": 3, "role": "owner", "self_link": "http://localhost:9001/3.0/members/3",
-        "user": "http://localhost:9001/3.0/users/1"}, {"address": "http://localhost:9001/3.0/addresses/su@example.com",
-        "delivery_mode": "regular", "email": "su@example.com", "http_etag": "\"50eebd88044b56c4a2073d93c0bf5c5da54f9b3c\"",
-        "list_id": "foo.example.com", "member_id": 2, "role": "owner", "self_link":
-        "http://localhost:9001/3.0/members/2", "user": "http://localhost:9001/3.0/users/2"}],
-        "http_etag": "\"c0fdf1ee97951fabb09248a5b663efb29ead01cf\"", "start": 0, "total_size":
-        2}'}
-    headers:
-      content-length: ['801']
-      content-type: [application/json; charset=utf-8]
-    status: {code: 200, message: OK}
-- request:
-    body: null
-    headers:
-      accept-encoding: ['gzip, deflate']
-    method: !!python/unicode 'GET'
-    uri: http://localhost:9001/3.0/lists/foo.example.com/roster/moderator
-  response:
-    body: {string: !!python/unicode '{"http_etag": "\"32223434a0f3af4cdc4673d1fbc5bac1f6d98fd3\"",
-        "start": 0, "total_size": 0}'}
-    headers:
-      content-length: ['90']
-      content-type: [application/json; charset=utf-8]
-    status: {code: 200, message: OK}
-- request:
-    body: null
-    headers:
-      accept-encoding: ['gzip, deflate']
-    method: !!python/unicode 'GET'
-    uri: http://localhost:9001/3.0/lists/foo.example.com/roster/owner
-  response:
-    body: {string: !!python/unicode '{"entries": [{"address": "http://localhost:9001/3.0/addresses/newowner@example.com",
-        "delivery_mode": "regular", "email": "newowner@example.com", "http_etag":
-        "\"0a19a1b74530e9a6e79d0164fd3504f7b06cd5bd\"", "list_id": "foo.example.com",
-        "member_id": 3, "role": "owner", "self_link": "http://localhost:9001/3.0/members/3",
-        "user": "http://localhost:9001/3.0/users/1"}, {"address": "http://localhost:9001/3.0/addresses/su@example.com",
-        "delivery_mode": "regular", "email": "su@example.com", "http_etag": "\"50eebd88044b56c4a2073d93c0bf5c5da54f9b3c\"",
-        "list_id": "foo.example.com", "member_id": 2, "role": "owner", "self_link":
-        "http://localhost:9001/3.0/members/2", "user": "http://localhost:9001/3.0/users/2"}],
-        "http_etag": "\"c0fdf1ee97951fabb09248a5b663efb29ead01cf\"", "start": 0, "total_size":
-        2}'}
-    headers:
-      content-length: ['801']
-      content-type: [application/json; charset=utf-8]
-    status: {code: 200, message: OK}
-- request:
-    body: null
-    headers:
-      accept-encoding: ['gzip, deflate']
-    method: !!python/unicode 'GET'
-    uri: http://localhost:9001/3.0/lists/foo@example.com
-  response:
-    body: {string: !!python/unicode '{"display_name": "Foo", "fqdn_listname": "foo@example.com",
-        "http_etag": "\"698a819bbb6b902096a8c5543cc7fac2328960d5\"", "list_id": "foo.example.com",
-        "list_name": "foo", "mail_host": "example.com", "member_count": 0, "self_link":
-        "http://localhost:9001/3.0/lists/foo.example.com", "volume": 1}'}
-    headers:
-      content-length: ['294']
-      content-type: [application/json; charset=utf-8]
-    status: {code: 200, message: OK}
-- request:
-    body: null
-    headers:
-      accept-encoding: ['gzip, deflate']
-    method: !!python/unicode 'GET'
-    uri: http://localhost:9001/3.0/users/su@example.com
-  response:
-    body: {string: !!python/unicode '{"created_on": "2005-08-01T07:49:23", "http_etag":
-        "\"b36f8ca1d91d583901c768dc116815282d469c66\"", "is_server_owner": false,
-        "self_link": "http://localhost:9001/3.0/users/2", "user_id": 2}'}
-    headers:
-      content-length: ['188']
-      content-type: [application/json; charset=utf-8]
-    status: {code: 200, message: OK}
-- request:
-    body: null
-    headers:
-      accept-encoding: ['gzip, deflate']
-    method: !!python/unicode 'GET'
-    uri: http://localhost:9001/3.0/users/2/addresses
-  response:
-    body: {string: !!python/unicode '{"entries": [{"email": "su@example.com", "http_etag":
-        "\"a8988d233ad4b9e8641ad5d75553912565efec83\"", "original_email": "su@example.com",
-        "registered_on": "2005-08-01T07:49:23", "self_link": "http://localhost:9001/3.0/addresses/su@example.com",
-        "user": "http://localhost:9001/3.0/users/2"}], "http_etag": "\"7cc723891821fbf8b0974c2ec407cca11fbb6726\"",
-        "start": 0, "total_size": 1}'}
-    headers:
-      content-length: ['381']
-      content-type: [application/json; charset=utf-8]
-    status: {code: 200, message: OK}
-- request:
-    body: null
-    headers:
-      accept-encoding: ['gzip, deflate']
-    method: !!python/unicode 'GET'
-    uri: http://localhost:9001/3.0/addresses/su@example.com
-  response:
-    body: {string: !!python/unicode '{"email": "su@example.com", "http_etag": "\"a8988d233ad4b9e8641ad5d75553912565efec83\"",
-        "original_email": "su@example.com", "registered_on": "2005-08-01T07:49:23",
-        "self_link": "http://localhost:9001/3.0/addresses/su@example.com", "user":
-        "http://localhost:9001/3.0/users/2"}'}
-    headers:
-      content-length: ['276']
-      content-type: [application/json; charset=utf-8]
-    status: {code: 200, message: OK}
-- request:
-    body: null
-    headers:
-      accept-encoding: ['gzip, deflate']
-    method: !!python/unicode 'GET'
-    uri: http://localhost:9001/3.0/lists/foo.example.com/roster/owner
-  response:
-    body: {string: !!python/unicode '{"entries": [{"address": "http://localhost:9001/3.0/addresses/newowner@example.com",
-        "delivery_mode": "regular", "email": "newowner@example.com", "http_etag":
-        "\"0a19a1b74530e9a6e79d0164fd3504f7b06cd5bd\"", "list_id": "foo.example.com",
-        "member_id": 3, "role": "owner", "self_link": "http://localhost:9001/3.0/members/3",
-        "user": "http://localhost:9001/3.0/users/1"}, {"address": "http://localhost:9001/3.0/addresses/su@example.com",
-        "delivery_mode": "regular", "email": "su@example.com", "http_etag": "\"50eebd88044b56c4a2073d93c0bf5c5da54f9b3c\"",
-        "list_id": "foo.example.com", "member_id": 2, "role": "owner", "self_link":
-        "http://localhost:9001/3.0/members/2", "user": "http://localhost:9001/3.0/users/2"}],
-        "http_etag": "\"c0fdf1ee97951fabb09248a5b663efb29ead01cf\"", "start": 0, "total_size":
-        2}'}
-    headers:
-      content-length: ['801']
-      content-type: [application/json; charset=utf-8]
-    status: {code: 200, message: OK}
-- request:
-    body: null
-    headers:
-      accept-encoding: ['gzip, deflate']
-    method: !!python/unicode 'GET'
-    uri: http://localhost:9001/3.0/lists/foo@example.com
-  response:
-    body: {string: !!python/unicode '{"display_name": "Foo", "fqdn_listname": "foo@example.com",
-        "http_etag": "\"698a819bbb6b902096a8c5543cc7fac2328960d5\"", "list_id": "foo.example.com",
-        "list_name": "foo", "mail_host": "example.com", "member_count": 0, "self_link":
-        "http://localhost:9001/3.0/lists/foo.example.com", "volume": 1}'}
-    headers:
-      content-length: ['294']
-      content-type: [application/json; charset=utf-8]
-    status: {code: 200, message: OK}
-- request:
-    body: null
-    headers:
-      accept-encoding: ['gzip, deflate']
-    method: !!python/unicode 'GET'
-    uri: http://localhost:9001/3.0/lists/foo.example.com/roster/owner
-  response:
-    body: {string: !!python/unicode '{"entries": [{"address": "http://localhost:9001/3.0/addresses/newowner@example.com",
-        "delivery_mode": "regular", "email": "newowner@example.com", "http_etag":
-        "\"0a19a1b74530e9a6e79d0164fd3504f7b06cd5bd\"", "list_id": "foo.example.com",
-        "member_id": 3, "role": "owner", "self_link": "http://localhost:9001/3.0/members/3",
-        "user": "http://localhost:9001/3.0/users/1"}, {"address": "http://localhost:9001/3.0/addresses/su@example.com",
-        "delivery_mode": "regular", "email": "su@example.com", "http_etag": "\"50eebd88044b56c4a2073d93c0bf5c5da54f9b3c\"",
-        "list_id": "foo.example.com", "member_id": 2, "role": "owner", "self_link":
-        "http://localhost:9001/3.0/members/2", "user": "http://localhost:9001/3.0/users/2"}],
-        "http_etag": "\"c0fdf1ee97951fabb09248a5b663efb29ead01cf\"", "start": 0, "total_size":
-        2}'}
-    headers:
-      content-length: ['801']
-      content-type: [application/json; charset=utf-8]
-    status: {code: 200, message: OK}
-- request:
-    body: null
-    headers:
-      accept-encoding: ['gzip, deflate']
-    method: !!python/unicode 'DELETE'
-    uri: http://localhost:9001/3.0/lists/foo@example.com/owner/newowner@example.com
-  response:
-    body: {string: !!python/unicode ''}
-    headers:
-      content-length: ['0']
-    status: {code: 204, message: No Content}
-- request:
-    body: null
-    headers:
-      accept-encoding: ['gzip, deflate']
-    method: !!python/unicode 'GET'
-    uri: http://localhost:9001/3.0/lists/foo.example.com/roster/owner
-  response:
-    body: {string: !!python/unicode '{"entries": [{"address": "http://localhost:9001/3.0/addresses/su@example.com",
-        "delivery_mode": "regular", "email": "su@example.com", "http_etag": "\"50eebd88044b56c4a2073d93c0bf5c5da54f9b3c\"",
-        "list_id": "foo.example.com", "member_id": 2, "role": "owner", "self_link":
-        "http://localhost:9001/3.0/members/2", "user": "http://localhost:9001/3.0/users/2"}],
-        "http_etag": "\"902cfc083f243f174e2457cc0b5ef0e669c1cae3\"", "start": 0, "total_size":
-        1}'}
-    headers:
-      content-length: ['446']
-      content-type: [application/json; charset=utf-8]
-    status: {code: 200, message: OK}
-- request:
-    body: null
-    headers:
-      accept-encoding: ['gzip, deflate']
-    method: !!python/unicode 'GET'
-    uri: http://localhost:9001/3.0/lists/foo@example.com
-  response:
-    body: {string: !!python/unicode '{"display_name": "Foo", "fqdn_listname": "foo@example.com",
-        "http_etag": "\"698a819bbb6b902096a8c5543cc7fac2328960d5\"", "list_id": "foo.example.com",
-        "list_name": "foo", "mail_host": "example.com", "member_count": 0, "self_link":
-        "http://localhost:9001/3.0/lists/foo.example.com", "volume": 1}'}
-    headers:
-      content-length: ['294']
-      content-type: [application/json; charset=utf-8]
-    status: {code: 200, message: OK}
-- request:
-    body: null
-    headers:
-      accept-encoding: ['gzip, deflate']
-    method: !!python/unicode 'GET'
-    uri: http://localhost:9001/3.0/users/su@example.com
-  response:
-    body: {string: !!python/unicode '{"created_on": "2005-08-01T07:49:23", "http_etag":
-        "\"b36f8ca1d91d583901c768dc116815282d469c66\"", "is_server_owner": false,
-        "self_link": "http://localhost:9001/3.0/users/2", "user_id": 2}'}
-    headers:
-      content-length: ['188']
-      content-type: [application/json; charset=utf-8]
-    status: {code: 200, message: OK}
-- request:
-    body: null
-    headers:
-      accept-encoding: ['gzip, deflate']
-    method: !!python/unicode 'GET'
-    uri: http://localhost:9001/3.0/users/2/addresses
-  response:
-    body: {string: !!python/unicode '{"entries": [{"email": "su@example.com", "http_etag":
-        "\"a8988d233ad4b9e8641ad5d75553912565efec83\"", "original_email": "su@example.com",
-        "registered_on": "2005-08-01T07:49:23", "self_link": "http://localhost:9001/3.0/addresses/su@example.com",
-        "user": "http://localhost:9001/3.0/users/2"}], "http_etag": "\"7cc723891821fbf8b0974c2ec407cca11fbb6726\"",
-        "start": 0, "total_size": 1}'}
-    headers:
-      content-length: ['381']
-      content-type: [application/json; charset=utf-8]
-    status: {code: 200, message: OK}
-- request:
-    body: null
-    headers:
-      accept-encoding: ['gzip, deflate']
-    method: !!python/unicode 'GET'
-    uri: http://localhost:9001/3.0/addresses/su@example.com
-  response:
-    body: {string: !!python/unicode '{"email": "su@example.com", "http_etag": "\"a8988d233ad4b9e8641ad5d75553912565efec83\"",
-        "original_email": "su@example.com", "registered_on": "2005-08-01T07:49:23",
-        "self_link": "http://localhost:9001/3.0/addresses/su@example.com", "user":
-        "http://localhost:9001/3.0/users/2"}'}
-    headers:
-      content-length: ['276']
-      content-type: [application/json; charset=utf-8]
-    status: {code: 200, message: OK}
-- request:
-    body: null
-    headers:
-      accept-encoding: ['gzip, deflate']
-    method: !!python/unicode 'GET'
-    uri: http://localhost:9001/3.0/lists/foo.example.com/roster/owner
-  response:
-    body: {string: !!python/unicode '{"entries": [{"address": "http://localhost:9001/3.0/addresses/su@example.com",
-        "delivery_mode": "regular", "email": "su@example.com", "http_etag": "\"50eebd88044b56c4a2073d93c0bf5c5da54f9b3c\"",
-        "list_id": "foo.example.com", "member_id": 2, "role": "owner", "self_link":
-        "http://localhost:9001/3.0/members/2", "user": "http://localhost:9001/3.0/users/2"}],
-        "http_etag": "\"902cfc083f243f174e2457cc0b5ef0e669c1cae3\"", "start": 0, "total_size":
-        1}'}
-    headers:
-      content-length: ['446']
-      content-type: [application/json; charset=utf-8]
-    status: {code: 200, message: OK}
-- request:
-    body: null
-    headers:
-      accept-encoding: ['gzip, deflate']
-    method: !!python/unicode 'GET'
-    uri: http://localhost:9001/3.0/lists/foo@example.com
-  response:
-    body: {string: !!python/unicode '{"display_name": "Foo", "fqdn_listname": "foo@example.com",
-        "http_etag": "\"698a819bbb6b902096a8c5543cc7fac2328960d5\"", "list_id": "foo.example.com",
-        "list_name": "foo", "mail_host": "example.com", "member_count": 0, "self_link":
-        "http://localhost:9001/3.0/lists/foo.example.com", "volume": 1}'}
-    headers:
-      content-length: ['294']
-      content-type: [application/json; charset=utf-8]
-    status: {code: 200, message: OK}
-- request:
-    body: null
-    headers:
-      accept-encoding: ['gzip, deflate']
-    method: !!python/unicode 'GET'
-    uri: http://localhost:9001/3.0/lists/foo.example.com/roster/owner
-  response:
-    body: {string: !!python/unicode '{"entries": [{"address": "http://localhost:9001/3.0/addresses/su@example.com",
-        "delivery_mode": "regular", "email": "su@example.com", "http_etag": "\"50eebd88044b56c4a2073d93c0bf5c5da54f9b3c\"",
-        "list_id": "foo.example.com", "member_id": 2, "role": "owner", "self_link":
-        "http://localhost:9001/3.0/members/2", "user": "http://localhost:9001/3.0/users/2"}],
-        "http_etag": "\"902cfc083f243f174e2457cc0b5ef0e669c1cae3\"", "start": 0, "total_size":
-        1}'}
-    headers:
-      content-length: ['446']
-      content-type: [application/json; charset=utf-8]
-    status: {code: 200, message: OK}
-- request:
-    body: null
-    headers:
-      accept-encoding: ['gzip, deflate']
-    method: !!python/unicode 'GET'
-    uri: http://localhost:9001/3.0/lists/foo.example.com/roster/owner
-  response:
-    body: {string: !!python/unicode '{"entries": [{"address": "http://localhost:9001/3.0/addresses/su@example.com",
-        "delivery_mode": "regular", "email": "su@example.com", "http_etag": "\"50eebd88044b56c4a2073d93c0bf5c5da54f9b3c\"",
-        "list_id": "foo.example.com", "member_id": 2, "role": "owner", "self_link":
-        "http://localhost:9001/3.0/members/2", "user": "http://localhost:9001/3.0/users/2"}],
-        "http_etag": "\"902cfc083f243f174e2457cc0b5ef0e669c1cae3\"", "start": 0, "total_size":
-        1}'}
-    headers:
-      content-length: ['446']
-      content-type: [application/json; charset=utf-8]
-    status: {code: 200, message: OK}
-version: 1
diff --git a/src/postorius/tests/fixtures/vcr_cassettes/test_list_members_add_owner_new_owner_added.yaml b/src/postorius/tests/fixtures/vcr_cassettes/test_list_members_add_owner_new_owner_added.yaml
deleted file mode 100644
index 1cfbbf7..0000000
--- a/src/postorius/tests/fixtures/vcr_cassettes/test_list_members_add_owner_new_owner_added.yaml
+++ /dev/null
@@ -1,197 +0,0 @@
-interactions:
-- request:
-    body: null
-    headers:
-      accept-encoding: ['gzip, deflate']
-    method: !!python/unicode 'GET'
-    uri: http://localhost:9001/3.0/lists/foo@example.com
-  response:
-    body: {string: !!python/unicode '{"display_name": "Foo", "fqdn_listname": "foo@example.com",
-        "http_etag": "\"698a819bbb6b902096a8c5543cc7fac2328960d5\"", "list_id": "foo.example.com",
-        "list_name": "foo", "mail_host": "example.com", "member_count": 0, "self_link":
-        "http://localhost:9001/3.0/lists/foo.example.com", "volume": 1}'}
-    headers:
-      content-length: ['294']
-      content-type: [application/json; charset=utf-8]
-    status: {code: 200, message: OK}
-- request:
-    body: null
-    headers:
-      accept-encoding: ['gzip, deflate']
-    method: !!python/unicode 'GET'
-    uri: http://localhost:9001/3.0/users/su@example.com
-  response:
-    body: {string: !!python/unicode '404 Not Found'}
-    headers:
-      content-length: ['13']
-      content-type: [application/json; charset=utf-8]
-    status: {code: 404, message: Not Found}
-- request:
-    body: null
-    headers:
-      accept-encoding: ['gzip, deflate']
-    method: !!python/unicode 'GET'
-    uri: http://localhost:9001/3.0/lists/foo.example.com/roster/owner
-  response:
-    body: {string: !!python/unicode '{"http_etag": "\"32223434a0f3af4cdc4673d1fbc5bac1f6d98fd3\"",
-        "start": 0, "total_size": 0}'}
-    headers:
-      content-length: ['90']
-      content-type: [application/json; charset=utf-8]
-    status: {code: 200, message: OK}
-- request:
-    body: null
-    headers:
-      accept-encoding: ['gzip, deflate']
-    method: !!python/unicode 'GET'
-    uri: http://localhost:9001/3.0/lists/foo.example.com/roster/moderator
-  response:
-    body: {string: !!python/unicode '{"http_etag": "\"32223434a0f3af4cdc4673d1fbc5bac1f6d98fd3\"",
-        "start": 0, "total_size": 0}'}
-    headers:
-      content-length: ['90']
-      content-type: [application/json; charset=utf-8]
-    status: {code: 200, message: OK}
-- request:
-    body: subscriber=newowner%40example.com&role=owner&list_id=foo.example.com
-    headers:
-      accept-encoding: ['gzip, deflate']
-      !!python/unicode 'content-type': [!!python/unicode 'application/x-www-form-urlencoded']
-    method: !!python/unicode 'POST'
-    uri: http://localhost:9001/3.0/members
-  response:
-    body: {string: !!python/unicode ''}
-    headers:
-      content-length: ['0']
-      location: ['http://localhost:9001/3.0/members/1']
-    status: {code: 201, message: Created}
-- request:
-    body: null
-    headers:
-      accept-encoding: ['gzip, deflate']
-    method: !!python/unicode 'GET'
-    uri: http://localhost:9001/3.0/lists/foo@example.com/roster/member?count=1&page=1
-  response:
-    body: {string: !!python/unicode '{"http_etag": "\"32223434a0f3af4cdc4673d1fbc5bac1f6d98fd3\"",
-        "start": 0, "total_size": 0}'}
-    headers:
-      content-length: ['90']
-      content-type: [application/json; charset=utf-8]
-    status: {code: 200, message: OK}
-- request:
-    body: null
-    headers:
-      accept-encoding: ['gzip, deflate']
-    method: !!python/unicode 'GET'
-    uri: http://localhost:9001/3.0/lists/foo@example.com/roster/member?count=25&page=1
-  response:
-    body: {string: !!python/unicode '{"http_etag": "\"32223434a0f3af4cdc4673d1fbc5bac1f6d98fd3\"",
-        "start": 0, "total_size": 0}'}
-    headers:
-      content-length: ['90']
-      content-type: [application/json; charset=utf-8]
-    status: {code: 200, message: OK}
-- request:
-    body: null
-    headers:
-      accept-encoding: ['gzip, deflate']
-    method: !!python/unicode 'GET'
-    uri: http://localhost:9001/3.0/lists/foo.example.com/roster/owner
-  response:
-    body: {string: !!python/unicode '{"entries": [{"address": "http://localhost:9001/3.0/addresses/newowner@example.com",
-        "delivery_mode": "regular", "email": "newowner@example.com", "http_etag":
-        "\"1e656e8469afe5acc1725ce34ba2d64c95d401bb\"", "list_id": "foo.example.com",
-        "member_id": 1, "role": "owner", "self_link": "http://localhost:9001/3.0/members/1",
-        "user": "http://localhost:9001/3.0/users/1"}], "http_etag": "\"6d8e08bc7a0c4c26e574f282f7c140254cc57531\"",
-        "start": 0, "total_size": 1}'}
-    headers:
-      content-length: ['458']
-      content-type: [application/json; charset=utf-8]
-    status: {code: 200, message: OK}
-- request:
-    body: null
-    headers:
-      accept-encoding: ['gzip, deflate']
-    method: !!python/unicode 'GET'
-    uri: http://localhost:9001/3.0/lists/foo.example.com/roster/moderator
-  response:
-    body: {string: !!python/unicode '{"http_etag": "\"32223434a0f3af4cdc4673d1fbc5bac1f6d98fd3\"",
-        "start": 0, "total_size": 0}'}
-    headers:
-      content-length: ['90']
-      content-type: [application/json; charset=utf-8]
-    status: {code: 200, message: OK}
-- request:
-    body: null
-    headers:
-      accept-encoding: ['gzip, deflate']
-    method: !!python/unicode 'GET'
-    uri: http://localhost:9001/3.0/lists/foo.example.com/roster/owner
-  response:
-    body: {string: !!python/unicode '{"entries": [{"address": "http://localhost:9001/3.0/addresses/newowner@example.com",
-        "delivery_mode": "regular", "email": "newowner@example.com", "http_etag":
-        "\"1e656e8469afe5acc1725ce34ba2d64c95d401bb\"", "list_id": "foo.example.com",
-        "member_id": 1, "role": "owner", "self_link": "http://localhost:9001/3.0/members/1",
-        "user": "http://localhost:9001/3.0/users/1"}], "http_etag": "\"6d8e08bc7a0c4c26e574f282f7c140254cc57531\"",
-        "start": 0, "total_size": 1}'}
-    headers:
-      content-length: ['458']
-      content-type: [application/json; charset=utf-8]
-    status: {code: 200, message: OK}
-- request:
-    body: null
-    headers:
-      accept-encoding: ['gzip, deflate']
-    method: !!python/unicode 'GET'
-    uri: http://localhost:9001/3.0/lists/foo@example.com
-  response:
-    body: {string: !!python/unicode '{"display_name": "Foo", "fqdn_listname": "foo@example.com",
-        "http_etag": "\"698a819bbb6b902096a8c5543cc7fac2328960d5\"", "list_id": "foo.example.com",
-        "list_name": "foo", "mail_host": "example.com", "member_count": 0, "self_link":
-        "http://localhost:9001/3.0/lists/foo.example.com", "volume": 1}'}
-    headers:
-      content-length: ['294']
-      content-type: [application/json; charset=utf-8]
-    status: {code: 200, message: OK}
-- request:
-    body: null
-    headers:
-      accept-encoding: ['gzip, deflate']
-    method: !!python/unicode 'GET'
-    uri: http://localhost:9001/3.0/lists/foo.example.com/roster/owner
-  response:
-    body: {string: !!python/unicode '{"entries": [{"address": "http://localhost:9001/3.0/addresses/newowner@example.com",
-        "delivery_mode": "regular", "email": "newowner@example.com", "http_etag":
-        "\"1e656e8469afe5acc1725ce34ba2d64c95d401bb\"", "list_id": "foo.example.com",
-        "member_id": 1, "role": "owner", "self_link": "http://localhost:9001/3.0/members/1",
-        "user": "http://localhost:9001/3.0/users/1"}], "http_etag": "\"6d8e08bc7a0c4c26e574f282f7c140254cc57531\"",
-        "start": 0, "total_size": 1}'}
-    headers:
-      content-length: ['458']
-      content-type: [application/json; charset=utf-8]
-    status: {code: 200, message: OK}
-- request:
-    body: null
-    headers:
-      accept-encoding: ['gzip, deflate']
-    method: !!python/unicode 'DELETE'
-    uri: http://localhost:9001/3.0/lists/foo@example.com/owner/newowner@example.com
-  response:
-    body: {string: !!python/unicode ''}
-    headers:
-      content-length: ['0']
-    status: {code: 204, message: No Content}
-- request:
-    body: null
-    headers:
-      accept-encoding: ['gzip, deflate']
-    method: !!python/unicode 'GET'
-    uri: http://localhost:9001/3.0/lists/foo.example.com/roster/owner
-  response:
-    body: {string: !!python/unicode '{"http_etag": "\"32223434a0f3af4cdc4673d1fbc5bac1f6d98fd3\"",
-        "start": 0, "total_size": 0}'}
-    headers:
-      content-length: ['90']
-      content-type: [application/json; charset=utf-8]
-    status: {code: 200, message: OK}
-version: 1
diff --git a/src/postorius/tests/fixtures/vcr_cassettes/test_list_members_owner.yaml b/src/postorius/tests/fixtures/vcr_cassettes/test_list_members_owner.yaml
new file mode 100644
index 0000000..1cc54b2
--- /dev/null
+++ b/src/postorius/tests/fixtures/vcr_cassettes/test_list_members_owner.yaml
@@ -0,0 +1,151 @@
+interactions:
+- request:
+    body: mail_host=example.com
+    headers:
+      accept-encoding: ['gzip, deflate']
+      !!python/unicode 'content-type': [!!python/unicode 'application/x-www-form-urlencoded']
+    method: !!python/unicode 'POST'
+    uri: http://localhost:9001/3.0/domains
+  response:
+    body: {string: !!python/unicode ''}
+    headers:
+      content-length: ['0']
+      location: ['http://localhost:9001/3.0/domains/example.com']
+    status: {code: 201, message: Created}
+- request:
+    body: null
+    headers:
+      accept-encoding: ['gzip, deflate']
+    method: !!python/unicode 'GET'
+    uri: http://localhost:9001/3.0/domains/example.com
+  response:
+    body: {string: !!python/unicode '{"base_url": "http://example.com", "description":
+        null, "http_etag": "\"e736411818ff1815ca83575e0958c38c5188f0a4\"", "mail_host":
+        "example.com", "self_link": "http://localhost:9001/3.0/domains/example.com",
+        "url_host": "example.com"}'}
+    headers:
+      content-length: ['233']
+      content-type: [application/json; charset=utf-8]
+    status: {code: 200, message: OK}
+- request:
+    body: fqdn_listname=foo%40example.com
+    headers:
+      accept-encoding: ['gzip, deflate']
+      !!python/unicode 'content-type': [!!python/unicode 'application/x-www-form-urlencoded']
+    method: !!python/unicode 'POST'
+    uri: http://localhost:9001/3.0/lists
+  response:
+    body: {string: !!python/unicode ''}
+    headers:
+      content-length: ['0']
+      location: ['http://localhost:9001/3.0/lists/foo.example.com']
+    status: {code: 201, message: Created}
+- request:
+    body: null
+    headers:
+      accept-encoding: ['gzip, deflate']
+    method: !!python/unicode 'GET'
+    uri: http://localhost:9001/3.0/lists/foo.example.com
+  response:
+    body: {string: !!python/unicode '{"display_name": "Foo", "fqdn_listname": "foo@example.com",
+        "http_etag": "\"698a819bbb6b902096a8c5543cc7fac2328960d5\"", "list_id": "foo.example.com",
+        "list_name": "foo", "mail_host": "example.com", "member_count": 0, "self_link":
+        "http://localhost:9001/3.0/lists/foo.example.com", "volume": 1}'}
+    headers:
+      content-length: ['294']
+      content-type: [application/json; charset=utf-8]
+    status: {code: 200, message: OK}
+- request:
+    body: null
+    headers:
+      accept-encoding: ['gzip, deflate']
+    method: !!python/unicode 'DELETE'
+    uri: http://localhost:9001/3.0/lists/foo@example.com
+  response:
+    body: {string: !!python/unicode ''}
+    headers:
+      content-length: ['0']
+    status: {code: 204, message: No Content}
+- request:
+    body: mail_host=example.com
+    headers:
+      accept-encoding: ['gzip, deflate']
+      !!python/unicode 'content-type': [!!python/unicode 'application/x-www-form-urlencoded']
+    method: !!python/unicode 'POST'
+    uri: http://localhost:9001/3.0/domains
+  response:
+    body: {string: !!python/unicode 'Duplicate email host: example.com'}
+    headers:
+      content-length: ['33']
+      content-type: [application/json; charset=utf-8]
+    status: {code: 400, message: Bad Request}
+- request:
+    body: null
+    headers:
+      accept-encoding: ['gzip, deflate']
+    method: !!python/unicode 'GET'
+    uri: http://localhost:9001/3.0/domains/example.com
+  response:
+    body: {string: !!python/unicode '{"base_url": "http://example.com", "description":
+        null, "http_etag": "\"e736411818ff1815ca83575e0958c38c5188f0a4\"", "mail_host":
+        "example.com", "self_link": "http://localhost:9001/3.0/domains/example.com",
+        "url_host": "example.com"}'}
+    headers:
+      content-length: ['233']
+      content-type: [application/json; charset=utf-8]
+    status: {code: 200, message: OK}
+- request:
+    body: null
+    headers:
+      accept-encoding: ['gzip, deflate']
+    method: !!python/unicode 'GET'
+    uri: http://localhost:9001/3.0/domains/example.com
+  response:
+    body: {string: !!python/unicode '{"base_url": "http://example.com", "description":
+        null, "http_etag": "\"e736411818ff1815ca83575e0958c38c5188f0a4\"", "mail_host":
+        "example.com", "self_link": "http://localhost:9001/3.0/domains/example.com",
+        "url_host": "example.com"}'}
+    headers:
+      content-length: ['233']
+      content-type: [application/json; charset=utf-8]
+    status: {code: 200, message: OK}
+- request:
+    body: fqdn_listname=foo%40example.com
+    headers:
+      accept-encoding: ['gzip, deflate']
+      !!python/unicode 'content-type': [!!python/unicode 'application/x-www-form-urlencoded']
+    method: !!python/unicode 'POST'
+    uri: http://localhost:9001/3.0/lists
+  response:
+    body: {string: !!python/unicode ''}
+    headers:
+      content-length: ['0']
+      location: ['http://localhost:9001/3.0/lists/foo.example.com']
+    status: {code: 201, message: Created}
+- request:
+    body: null
+    headers:
+      accept-encoding: ['gzip, deflate']
+    method: !!python/unicode 'GET'
+    uri: http://localhost:9001/3.0/lists/foo.example.com
+  response:
+    body: {string: !!python/unicode '{"display_name": "Foo", "fqdn_listname": "foo@example.com",
+        "http_etag": "\"698a819bbb6b902096a8c5543cc7fac2328960d5\"", "list_id": "foo.example.com",
+        "list_name": "foo", "mail_host": "example.com", "member_count": 0, "self_link":
+        "http://localhost:9001/3.0/lists/foo.example.com", "volume": 1}'}
+    headers:
+      content-length: ['294']
+      content-type: [application/json; charset=utf-8]
+    status: {code: 200, message: OK}
+- request:
+    body: null
+    headers:
+      accept-encoding: ['gzip, deflate']
+    method: !!python/unicode 'DELETE'
+    uri: http://localhost:9001/3.0/lists/foo@example.com
+  response:
+    body: {string: !!python/unicode ''}
+    headers:
+      content-length: ['0']
+    status: {code: 204, message: No Content}
+version: 1
diff --git a/src/postorius/tests/fixtures/vcr_cassettes/test_list_members_owner_add_remove.yaml b/src/postorius/tests/fixtures/vcr_cassettes/test_list_members_owner_add_remove.yaml
new file mode 100644
index 0000000..1cfbbf7
--- /dev/null
+++ b/src/postorius/tests/fixtures/vcr_cassettes/test_list_members_owner_add_remove.yaml
@@ -0,0 +1,197 @@
+interactions:
+- request:
+    body: null
+    headers:
+      accept-encoding: ['gzip, deflate']
+    method: !!python/unicode 'GET'
+    uri: http://localhost:9001/3.0/lists/foo@example.com
+  response:
+    body: {string: !!python/unicode '{"display_name": "Foo", "fqdn_listname": "foo@example.com",
+        "http_etag": "\"698a819bbb6b902096a8c5543cc7fac2328960d5\"", "list_id": "foo.example.com",
+        "list_name": "foo", "mail_host": "example.com", "member_count": 0, "self_link":
+        "http://localhost:9001/3.0/lists/foo.example.com", "volume": 1}'}
+    headers:
+      content-length: ['294']
+      content-type: [application/json; charset=utf-8]
+    status: {code: 200, message: OK}
+- request:
+    body: null
+    headers:
+      accept-encoding: ['gzip, deflate']
+    method: !!python/unicode 'GET'
+    uri: http://localhost:9001/3.0/users/su@example.com
+  response:
+    body: {string: !!python/unicode '404 Not Found'}
+    headers:
+      content-length: ['13']
+      content-type: [application/json; charset=utf-8]
+    status: {code: 404, message: Not Found}
+- request:
+    body: null
+    headers:
+      accept-encoding: ['gzip, deflate']
+    method: !!python/unicode 'GET'
+    uri: http://localhost:9001/3.0/lists/foo.example.com/roster/owner
+  response:
+    body: {string: !!python/unicode '{"http_etag": "\"32223434a0f3af4cdc4673d1fbc5bac1f6d98fd3\"",
+        "start": 0, "total_size": 0}'}
+    headers:
+      content-length: ['90']
+      content-type: [application/json; charset=utf-8]
+    status: {code: 200, message: OK}
+- request:
+    body: null
+    headers:
+      accept-encoding: ['gzip, deflate']
+    method: !!python/unicode 'GET'
+    uri: http://localhost:9001/3.0/lists/foo.example.com/roster/moderator
+  response:
+    body: {string: !!python/unicode '{"http_etag": "\"32223434a0f3af4cdc4673d1fbc5bac1f6d98fd3\"",
+        "start": 0, "total_size": 0}'}
+    headers:
+      content-length: ['90']
+      content-type: [application/json; charset=utf-8]
+    status: {code: 200, message: OK}
+- request:
+    body: subscriber=newowner%40example.com&role=owner&list_id=foo.example.com
+    headers:
+      accept-encoding: ['gzip, deflate']
+      !!python/unicode 'content-type': [!!python/unicode 'application/x-www-form-urlencoded']
+    method: !!python/unicode 'POST'
+    uri: http://localhost:9001/3.0/members
+  response:
+    body: {string: !!python/unicode ''}
+    headers:
+      content-length: ['0']
+      location: ['http://localhost:9001/3.0/members/1']
+    status: {code: 201, message: Created}
+- request:
+    body: null
+    headers:
+      accept-encoding: ['gzip, deflate']
+    method: !!python/unicode 'GET'
+    uri: http://localhost:9001/3.0/lists/foo@example.com/roster/member?count=1&page=1
+  response:
+    body: {string: !!python/unicode '{"http_etag": "\"32223434a0f3af4cdc4673d1fbc5bac1f6d98fd3\"",
+        "start": 0, "total_size": 0}'}
+    headers:
+      content-length: ['90']
+      content-type: [application/json; charset=utf-8]
+    status: {code: 200, message: OK}
+- request:
+    body: null
+    headers:
+      accept-encoding: ['gzip, deflate']
+    method: !!python/unicode 'GET'
+    uri: http://localhost:9001/3.0/lists/foo@example.com/roster/member?count=25&page=1
+  response:
+    body: {string: !!python/unicode '{"http_etag": "\"32223434a0f3af4cdc4673d1fbc5bac1f6d98fd3\"",
+        "start": 0, "total_size": 0}'}
+    headers:
+      content-length: ['90']
+      content-type: [application/json; charset=utf-8]
+    status: {code: 200, message: OK}
+- request:
+    body: null
+    headers:
+      accept-encoding: ['gzip, deflate']
+    method: !!python/unicode 'GET'
+    uri: http://localhost:9001/3.0/lists/foo.example.com/roster/owner
+  response:
+    body: {string: !!python/unicode '{"entries": [{"address": "http://localhost:9001/3.0/addresses/newowner@example.com",
+        "delivery_mode": "regular", "email": "newowner@example.com", "http_etag":
+        "\"1e656e8469afe5acc1725ce34ba2d64c95d401bb\"", "list_id": "foo.example.com",
+        "member_id": 1, "role": "owner", "self_link": "http://localhost:9001/3.0/members/1",
+        "user": "http://localhost:9001/3.0/users/1"}], "http_etag": "\"6d8e08bc7a0c4c26e574f282f7c140254cc57531\"",
+        "start": 0, "total_size": 1}'}
+    headers:
+      content-length: ['458']
+      content-type: [application/json; charset=utf-8]
+    status: {code: 200, message: OK}
+- request:
+    body: null
+    headers:
+      accept-encoding: ['gzip, deflate']
+    method: !!python/unicode 'GET'
+    uri: http://localhost:9001/3.0/lists/foo.example.com/roster/moderator
+  response:
+    body: {string: !!python/unicode '{"http_etag": "\"32223434a0f3af4cdc4673d1fbc5bac1f6d98fd3\"",
+        "start": 0, "total_size": 0}'}
+    headers:
+      content-length: ['90']
+      content-type: [application/json; charset=utf-8]
+    status: {code: 200, message: OK}
+- request:
+    body: null
+    headers:
+      accept-encoding: ['gzip, deflate']
+    method: !!python/unicode 'GET'
+    uri: http://localhost:9001/3.0/lists/foo.example.com/roster/owner
+  response:
+    body: {string: !!python/unicode '{"entries": [{"address": "http://localhost:9001/3.0/addresses/newowner@example.com",
+        "delivery_mode": "regular", "email": "newowner@example.com", "http_etag":
+        "\"1e656e8469afe5acc1725ce34ba2d64c95d401bb\"", "list_id": "foo.example.com",
+        "member_id": 1, "role": "owner", "self_link": "http://localhost:9001/3.0/members/1",
+        "user": "http://localhost:9001/3.0/users/1"}], "http_etag": "\"6d8e08bc7a0c4c26e574f282f7c140254cc57531\"",
+        "start": 0, "total_size": 1}'}
+    headers:
+      content-length: ['458']
+      content-type: [application/json; charset=utf-8]
+    status: {code: 200, message: OK}
+- request:
+    body: null
+    headers:
+      accept-encoding: ['gzip, deflate']
+    method: !!python/unicode 'GET'
+    uri: http://localhost:9001/3.0/lists/foo@example.com
+  response:
+    body: {string: !!python/unicode '{"display_name": "Foo", "fqdn_listname": "foo@example.com",
+        "http_etag": "\"698a819bbb6b902096a8c5543cc7fac2328960d5\"", "list_id": "foo.example.com",
+        "list_name": "foo", "mail_host": "example.com", "member_count": 0, "self_link":
+        "http://localhost:9001/3.0/lists/foo.example.com", "volume": 1}'}
+    headers:
+      content-length: ['294']
+      content-type: [application/json; charset=utf-8]
+    status: {code: 200, message: OK}
+- request:
+    body: null
+    headers:
+      accept-encoding: ['gzip, deflate']
+    method: !!python/unicode 'GET'
+    uri: http://localhost:9001/3.0/lists/foo.example.com/roster/owner
+  response:
+    body: {string: !!python/unicode '{"entries": [{"address": "http://localhost:9001/3.0/addresses/newowner@example.com",
+        "delivery_mode": "regular", "email": "newowner@example.com", "http_etag":
+        "\"1e656e8469afe5acc1725ce34ba2d64c95d401bb\"", "list_id": "foo.example.com",
+        "member_id": 1, "role": "owner", "self_link": "http://localhost:9001/3.0/members/1",
+        "user": "http://localhost:9001/3.0/users/1"}], "http_etag": "\"6d8e08bc7a0c4c26e574f282f7c140254cc57531\"",
+        "start": 0, "total_size": 1}'}
+    headers:
+      content-length: ['458']
+      content-type: [application/json; charset=utf-8]
+    status: {code: 200, message: OK}
+- request:
+    body: null
+    headers:
+      accept-encoding: ['gzip, deflate']
+    method: !!python/unicode 'DELETE'
+    uri: http://localhost:9001/3.0/lists/foo@example.com/owner/newowner@example.com
+  response:
+    body: {string: !!python/unicode ''}
+    headers:
+      content-length: ['0']
+    status: {code: 204, message: No Content}
+- request:
+    body: null
+    headers:
+      accept-encoding: ['gzip, deflate']
+    method: !!python/unicode 'GET'
+    uri: http://localhost:9001/3.0/lists/foo.example.com/roster/owner
+  response:
+    body: {string: !!python/unicode '{"http_etag": "\"32223434a0f3af4cdc4673d1fbc5bac1f6d98fd3\"",
+        "start": 0, "total_size": 0}'}
+    headers:
+      content-length: ['90']
+      content-type: [application/json; charset=utf-8]
+    status: {code: 200, message: OK}
+version: 1
diff --git a/src/postorius/tests/fixtures/vcr_cassettes/test_list_members_owner_by_owner.yaml b/src/postorius/tests/fixtures/vcr_cassettes/test_list_members_owner_by_owner.yaml
new file mode 100644
index 0000000..8dbe3c0
--- /dev/null
+++ b/src/postorius/tests/fixtures/vcr_cassettes/test_list_members_owner_by_owner.yaml
@@ -0,0 +1,502 @@
+interactions:
+- request:
+    body: null
+    headers:
+      accept-encoding: ['gzip, deflate']
+    method: !!python/unicode 'GET'
+    uri: http://localhost:9001/3.0/lists/foo@example.com
+  response:
+    body: {string: !!python/unicode '{"display_name": "Foo", "fqdn_listname": "foo@example.com",
+        "http_etag": "\"698a819bbb6b902096a8c5543cc7fac2328960d5\"", "list_id": "foo.example.com",
+        "list_name": "foo", "mail_host": "example.com", "member_count": 0, "self_link":
+        "http://localhost:9001/3.0/lists/foo.example.com", "volume": 1}'}
+    headers:
+      content-length: ['294']
+      content-type: [application/json; charset=utf-8]
+    status: {code: 200, message: OK}
+- request:
+    body: subscriber=su%40example.com&role=owner&list_id=foo.example.com
+    headers:
+      accept-encoding: ['gzip, deflate']
+      !!python/unicode 'content-type': [!!python/unicode 'application/x-www-form-urlencoded']
+    method: !!python/unicode 'POST'
+    uri: http://localhost:9001/3.0/members
+  response:
+    body: {string: !!python/unicode ''}
+    headers:
+      content-length: ['0']
+      location: ['http://localhost:9001/3.0/members/2']
+    status: {code: 201, message: Created}
+- request:
+    body: null
+    headers:
+      accept-encoding: ['gzip, deflate']
+    method: !!python/unicode 'GET'
+    uri: http://localhost:9001/3.0/lists/foo.example.com/roster/owner
+  response:
+    body: {string: !!python/unicode '{"entries": [{"address": "http://localhost:9001/3.0/addresses/su@example.com",
+        "delivery_mode": "regular", "email": "su@example.com", "http_etag": "\"50eebd88044b56c4a2073d93c0bf5c5da54f9b3c\"",
+        "list_id": "foo.example.com", "member_id": 2, "role": "owner", "self_link":
+        "http://localhost:9001/3.0/members/2", "user": "http://localhost:9001/3.0/users/2"}],
+        "http_etag": "\"902cfc083f243f174e2457cc0b5ef0e669c1cae3\"", "start": 0, "total_size":
+        1}'}
+    headers:
+      content-length: ['446']
+      content-type: [application/json; charset=utf-8]
+    status: {code: 200, message: OK}
+- request:
+    body: null
+    headers:
+      accept-encoding: ['gzip, deflate']
+    method: !!python/unicode 'GET'
+    uri: http://localhost:9001/3.0/lists/foo@example.com
+  response:
+    body: {string: !!python/unicode '{"display_name": "Foo", "fqdn_listname": "foo@example.com",
+        "http_etag": "\"698a819bbb6b902096a8c5543cc7fac2328960d5\"", "list_id": "foo.example.com",
+        "list_name": "foo", "mail_host": "example.com", "member_count": 0, "self_link":
+        "http://localhost:9001/3.0/lists/foo.example.com", "volume": 1}'}
+    headers:
+      content-length: ['294']
+      content-type: [application/json; charset=utf-8]
+    status: {code: 200, message: OK}
+- request:
+    body: null
+    headers:
+      accept-encoding: ['gzip, deflate']
+    method: !!python/unicode 'GET'
+    uri: http://localhost:9001/3.0/users/su@example.com
+  response:
+    body: {string: !!python/unicode '{"created_on": "2005-08-01T07:49:23", "http_etag":
+        "\"b36f8ca1d91d583901c768dc116815282d469c66\"", "is_server_owner": false,
+        "self_link": "http://localhost:9001/3.0/users/2", "user_id": 2}'}
+    headers:
+      content-length: ['188']
+      content-type: [application/json; charset=utf-8]
+    status: {code: 200, message: OK}
+- request:
+    body: null
+    headers:
+      accept-encoding: ['gzip, deflate']
+    method: !!python/unicode 'GET'
+    uri: http://localhost:9001/3.0/users/2/addresses
+  response:
+    body: {string: !!python/unicode '{"entries": [{"email": "su@example.com", "http_etag":
+        "\"a8988d233ad4b9e8641ad5d75553912565efec83\"", "original_email": "su@example.com",
+        "registered_on": "2005-08-01T07:49:23", "self_link": "http://localhost:9001/3.0/addresses/su@example.com",
+        "user": "http://localhost:9001/3.0/users/2"}], "http_etag": "\"7cc723891821fbf8b0974c2ec407cca11fbb6726\"",
+        "start": 0, "total_size": 1}'}
+    headers:
+      content-length: ['381']
+      content-type: [application/json; charset=utf-8]
+    status: {code: 200, message: OK}
+- request:
+    body: null
+    headers:
+      accept-encoding: ['gzip, deflate']
+    method: !!python/unicode 'GET'
+    uri: http://localhost:9001/3.0/addresses/su@example.com
+  response:
+    body: {string: !!python/unicode '{"email": "su@example.com", "http_etag": "\"a8988d233ad4b9e8641ad5d75553912565efec83\"",
+        "original_email": "su@example.com", "registered_on": "2005-08-01T07:49:23",
+        "self_link": "http://localhost:9001/3.0/addresses/su@example.com", "user":
+        "http://localhost:9001/3.0/users/2"}'}
+    headers:
+      content-length: ['276']
+      content-type: [application/json; charset=utf-8]
+    status: {code: 200, message: OK}
+- request:
+    body: null
+    headers:
+      accept-encoding: ['gzip, deflate']
+    method: !!python/unicode 'GET'
+    uri: http://localhost:9001/3.0/lists/foo.example.com/roster/owner
+  response:
+    body: {string: !!python/unicode '{"entries": [{"address": "http://localhost:9001/3.0/addresses/su@example.com",
+        "delivery_mode": "regular", "email": "su@example.com", "http_etag": "\"50eebd88044b56c4a2073d93c0bf5c5da54f9b3c\"",
+        "list_id": "foo.example.com", "member_id": 2, "role": "owner", "self_link":
+        "http://localhost:9001/3.0/members/2", "user": "http://localhost:9001/3.0/users/2"}],
+        "http_etag": "\"902cfc083f243f174e2457cc0b5ef0e669c1cae3\"", "start": 0, "total_size":
+        1}'}
+    headers:
+      content-length: ['446']
+      content-type: [application/json; charset=utf-8]
+    status: {code: 200, message: OK}
+- request:
+    body: null
+    headers:
+      accept-encoding: ['gzip, deflate']
+    method: !!python/unicode 'GET'
+    uri: http://localhost:9001/3.0/lists/foo.example.com/roster/moderator
+  response:
+    body: {string: !!python/unicode '{"http_etag": "\"32223434a0f3af4cdc4673d1fbc5bac1f6d98fd3\"",
+        "start": 0, "total_size": 0}'}
+    headers:
+      content-length: ['90']
+      content-type: [application/json; charset=utf-8]
+    status: {code: 200, message: OK}
+- request:
+    body: subscriber=newowner%40example.com&role=owner&list_id=foo.example.com
+    headers:
+      accept-encoding: ['gzip, deflate']
+      !!python/unicode 'content-type': [!!python/unicode 'application/x-www-form-urlencoded']
+    method: !!python/unicode 'POST'
+    uri: http://localhost:9001/3.0/members
+  response:
+    body: {string: !!python/unicode ''}
+    headers:
+      content-length: ['0']
+      location: ['http://localhost:9001/3.0/members/3']
+    status: {code: 201, message: Created}
+- request:
+    body: null
+    headers:
+      accept-encoding: ['gzip, deflate']
+    method: !!python/unicode 'GET'
+    uri: http://localhost:9001/3.0/lists/foo@example.com/roster/member?count=1&page=1
+  response:
+    body: {string: !!python/unicode '{"http_etag": "\"32223434a0f3af4cdc4673d1fbc5bac1f6d98fd3\"",
+        "start": 0, "total_size": 0}'}
+    headers:
+      content-length: ['90']
+      content-type: [application/json; charset=utf-8]
+    status: {code: 200, message: OK}
+- request:
+    body: null
+    headers:
+      accept-encoding: ['gzip, deflate']
+    method: !!python/unicode 'GET'
+    uri: http://localhost:9001/3.0/lists/foo@example.com/roster/member?count=25&page=1
+  response:
+    body: {string: !!python/unicode '{"http_etag": "\"32223434a0f3af4cdc4673d1fbc5bac1f6d98fd3\"",
+        "start": 0, "total_size": 0}'}
+    headers:
+      content-length: ['90']
+      content-type: [application/json; charset=utf-8]
+    status: {code: 200, message: OK}
+- request:
+    body: null
+    headers:
+      accept-encoding: ['gzip, deflate']
+    method: !!python/unicode 'GET'
+    uri: http://localhost:9001/3.0/lists/foo.example.com/roster/owner
+  response:
+    body: {string: !!python/unicode '{"entries": [{"address": "http://localhost:9001/3.0/addresses/newowner@example.com",
+        "delivery_mode": "regular", "email": "newowner@example.com", "http_etag":
+        "\"0a19a1b74530e9a6e79d0164fd3504f7b06cd5bd\"", "list_id": "foo.example.com",
+        "member_id": 3, "role": "owner", "self_link": "http://localhost:9001/3.0/members/3",
+        "user": "http://localhost:9001/3.0/users/1"}, {"address": "http://localhost:9001/3.0/addresses/su@example.com",
+        "delivery_mode": "regular", "email": "su@example.com", "http_etag": "\"50eebd88044b56c4a2073d93c0bf5c5da54f9b3c\"",
+        "list_id": "foo.example.com", "member_id": 2, "role": "owner", "self_link":
+        "http://localhost:9001/3.0/members/2", "user": "http://localhost:9001/3.0/users/2"}],
+        "http_etag": "\"c0fdf1ee97951fabb09248a5b663efb29ead01cf\"", "start": 0, "total_size":
+        2}'}
+    headers:
+      content-length: ['801']
+      content-type: [application/json; charset=utf-8]
+    status: {code: 200, message: OK}
+- request:
+    body: null
+    headers:
+      accept-encoding: ['gzip, deflate']
+    method: !!python/unicode 'GET'
+    uri: http://localhost:9001/3.0/lists/foo.example.com/roster/moderator
+  response:
+    body: {string: !!python/unicode '{"http_etag": "\"32223434a0f3af4cdc4673d1fbc5bac1f6d98fd3\"",
+        "start": 0, "total_size": 0}'}
+    headers:
+      content-length: ['90']
+      content-type: [application/json; charset=utf-8]
+    status: {code: 200, message: OK}
+- request:
+    body: null
+    headers:
+      accept-encoding: ['gzip, deflate']
+    method: !!python/unicode 'GET'
+    uri: http://localhost:9001/3.0/lists/foo.example.com/roster/owner
+  response:
+    body: {string: !!python/unicode '{"entries": [{"address": "http://localhost:9001/3.0/addresses/newowner@example.com",
+        "delivery_mode": "regular", "email": "newowner@example.com", "http_etag":
+        "\"0a19a1b74530e9a6e79d0164fd3504f7b06cd5bd\"", "list_id": "foo.example.com",
+        "member_id": 3, "role": "owner", "self_link": "http://localhost:9001/3.0/members/3",
+        "user": "http://localhost:9001/3.0/users/1"}, {"address": "http://localhost:9001/3.0/addresses/su@example.com",
+        "delivery_mode": "regular", "email": "su@example.com", "http_etag": "\"50eebd88044b56c4a2073d93c0bf5c5da54f9b3c\"",
+        "list_id": "foo.example.com", "member_id": 2, "role": "owner", "self_link":
+        "http://localhost:9001/3.0/members/2", "user": "http://localhost:9001/3.0/users/2"}],
+        "http_etag": "\"c0fdf1ee97951fabb09248a5b663efb29ead01cf\"", "start": 0, "total_size":
+        2}'}
+    headers:
+      content-length: ['801']
+      content-type: [application/json; charset=utf-8]
+    status: {code: 200, message: OK}
+- request:
+    body: null
+    headers:
+      accept-encoding: ['gzip, deflate']
+    method: !!python/unicode 'GET'
+    uri: http://localhost:9001/3.0/lists/foo@example.com
+  response:
+    body: {string: !!python/unicode '{"display_name": "Foo", "fqdn_listname": "foo@example.com",
+        "http_etag": "\"698a819bbb6b902096a8c5543cc7fac2328960d5\"", "list_id": "foo.example.com",
+        "list_name": "foo", "mail_host": "example.com", "member_count": 0, "self_link":
+        "http://localhost:9001/3.0/lists/foo.example.com", "volume": 1}'}
+    headers:
+      content-length: ['294']
+      content-type: [application/json; charset=utf-8]
+    status: {code: 200, message: OK}
+- request:
+    body: null
+    headers:
+      accept-encoding: ['gzip, deflate']
+    method: !!python/unicode 'GET'
+    uri: http://localhost:9001/3.0/users/su@example.com
+  response:
+    body: {string: !!python/unicode '{"created_on": "2005-08-01T07:49:23", "http_etag":
+        "\"b36f8ca1d91d583901c768dc116815282d469c66\"", "is_server_owner": false,
+        "self_link": "http://localhost:9001/3.0/users/2", "user_id": 2}'}
+    headers:
+      content-length: ['188']
+      content-type: [application/json; charset=utf-8]
+    status: {code: 200, message: OK}
+- request:
+    body: null
+    headers:
+      accept-encoding: ['gzip, deflate']
+    method: !!python/unicode 'GET'
+    uri: http://localhost:9001/3.0/users/2/addresses
+  response:
+    body: {string: !!python/unicode '{"entries": [{"email": "su@example.com", "http_etag":
+        "\"a8988d233ad4b9e8641ad5d75553912565efec83\"", "original_email": "su@example.com",
+        "registered_on": "2005-08-01T07:49:23", "self_link": "http://localhost:9001/3.0/addresses/su@example.com",
+        "user": "http://localhost:9001/3.0/users/2"}], "http_etag": "\"7cc723891821fbf8b0974c2ec407cca11fbb6726\"",
+        "start": 0, "total_size": 1}'}
+    headers:
+      content-length: ['381']
+      content-type: [application/json; charset=utf-8]
+    status: {code: 200, message: OK}
+- request:
+    body: null
+    headers:
+      accept-encoding: ['gzip, deflate']
+    method: !!python/unicode 'GET'
+    uri: http://localhost:9001/3.0/addresses/su@example.com
+  response:
+    body: {string: !!python/unicode '{"email": "su@example.com", "http_etag": "\"a8988d233ad4b9e8641ad5d75553912565efec83\"",
+        "original_email": "su@example.com", "registered_on": "2005-08-01T07:49:23",
+        "self_link": "http://localhost:9001/3.0/addresses/su@example.com", "user":
+        "http://localhost:9001/3.0/users/2"}'}
+    headers:
+      content-length: ['276']
+      content-type: [application/json; charset=utf-8]
+    status: {code: 200, message: OK}
+- request:
+    body: null
+    headers:
+      accept-encoding: ['gzip, deflate']
+    method: !!python/unicode 'GET'
+    uri: http://localhost:9001/3.0/lists/foo.example.com/roster/owner
+  response:
+    body: {string: !!python/unicode '{"entries": [{"address": "http://localhost:9001/3.0/addresses/newowner@example.com",
+        "delivery_mode": "regular", "email": "newowner@example.com", "http_etag":
+        "\"0a19a1b74530e9a6e79d0164fd3504f7b06cd5bd\"", "list_id": "foo.example.com",
+        "member_id": 3, "role": "owner", "self_link": "http://localhost:9001/3.0/members/3",
+        "user": "http://localhost:9001/3.0/users/1"}, {"address": "http://localhost:9001/3.0/addresses/su@example.com",
+        "delivery_mode": "regular", "email": "su@example.com", "http_etag": "\"50eebd88044b56c4a2073d93c0bf5c5da54f9b3c\"",
+        "list_id": "foo.example.com", "member_id": 2, "role": "owner", "self_link":
+        "http://localhost:9001/3.0/members/2", "user": "http://localhost:9001/3.0/users/2"}],
+        "http_etag": "\"c0fdf1ee97951fabb09248a5b663efb29ead01cf\"", "start": 0, "total_size":
+        2}'}
+    headers:
+      content-length: ['801']
+      content-type: [application/json; charset=utf-8]
+    status: {code: 200, message: OK}
+- request:
+    body: null
+    headers:
+      accept-encoding: ['gzip, deflate']
+    method: !!python/unicode 'GET'
+    uri: http://localhost:9001/3.0/lists/foo@example.com
+  response:
+    body: {string: !!python/unicode '{"display_name": "Foo", "fqdn_listname": "foo@example.com",
+        "http_etag": "\"698a819bbb6b902096a8c5543cc7fac2328960d5\"", "list_id": "foo.example.com",
+        "list_name": "foo", "mail_host": "example.com", "member_count": 0, "self_link":
+        "http://localhost:9001/3.0/lists/foo.example.com", "volume": 1}'}
+    headers:
+      content-length: ['294']
+      content-type: [application/json; charset=utf-8]
+    status: {code: 200, message: OK}
+- request:
+    body: null
+    headers:
+      accept-encoding: ['gzip, deflate']
+    method: !!python/unicode 'GET'
+    uri: http://localhost:9001/3.0/lists/foo.example.com/roster/owner
+  response:
+    body: {string: !!python/unicode '{"entries": [{"address": "http://localhost:9001/3.0/addresses/newowner@example.com",
+        "delivery_mode": "regular", "email": "newowner@example.com", "http_etag":
+        "\"0a19a1b74530e9a6e79d0164fd3504f7b06cd5bd\"", "list_id": "foo.example.com",
+        "member_id": 3, "role": "owner", "self_link": "http://localhost:9001/3.0/members/3",
+        "user": "http://localhost:9001/3.0/users/1"}, {"address": "http://localhost:9001/3.0/addresses/su@example.com",
+        "delivery_mode": "regular", "email": "su@example.com", "http_etag": "\"50eebd88044b56c4a2073d93c0bf5c5da54f9b3c\"",
+        "list_id": "foo.example.com", "member_id": 2, "role": "owner", "self_link":
+        "http://localhost:9001/3.0/members/2", "user": "http://localhost:9001/3.0/users/2"}],
+        "http_etag": "\"c0fdf1ee97951fabb09248a5b663efb29ead01cf\"", "start": 0, "total_size":
+        2}'}
+    headers:
+      content-length: ['801']
+      content-type: [application/json; charset=utf-8]
+    status: {code: 200, message: OK}
+- request:
+    body: null
+    headers:
+      accept-encoding: ['gzip, deflate']
+    method: !!python/unicode 'DELETE'
+    uri: http://localhost:9001/3.0/lists/foo@example.com/owner/newowner@example.com
+  response:
+    body: {string: !!python/unicode ''}
+    headers:
+      content-length: ['0']
+    status: {code: 204, message: No Content}
+- request:
+    body: null
+    headers:
+      accept-encoding: ['gzip, deflate']
+    method: !!python/unicode 'GET'
+    uri: http://localhost:9001/3.0/lists/foo.example.com/roster/owner
+  response:
+    body: {string: !!python/unicode '{"entries": [{"address": "http://localhost:9001/3.0/addresses/su@example.com",
+        "delivery_mode": "regular", "email": "su@example.com", "http_etag": "\"50eebd88044b56c4a2073d93c0bf5c5da54f9b3c\"",
+        "list_id": "foo.example.com", "member_id": 2, "role": "owner", "self_link":
+        "http://localhost:9001/3.0/members/2", "user": "http://localhost:9001/3.0/users/2"}],
+        "http_etag": "\"902cfc083f243f174e2457cc0b5ef0e669c1cae3\"", "start": 0, "total_size":
+        1}'}
+    headers:
+      content-length: ['446']
+      content-type: [application/json; charset=utf-8]
+    status: {code: 200, message: OK}
+- request:
+    body: null
+    headers:
+      accept-encoding: ['gzip, deflate']
+    method: !!python/unicode 'GET'
+    uri: http://localhost:9001/3.0/lists/foo@example.com
+  response:
+    body: {string: !!python/unicode '{"display_name": "Foo", "fqdn_listname": "foo@example.com",
+        "http_etag": "\"698a819bbb6b902096a8c5543cc7fac2328960d5\"", "list_id": "foo.example.com",
+        "list_name": "foo", "mail_host": "example.com", "member_count": 0, "self_link":
+        "http://localhost:9001/3.0/lists/foo.example.com", "volume": 1}'}
+    headers:
+      content-length: ['294']
+      content-type: [application/json; charset=utf-8]
+    status: {code: 200, message: OK}
+- request:
+    body: null
+    headers:
+      accept-encoding: ['gzip, deflate']
+    method: !!python/unicode 'GET'
+    uri: http://localhost:9001/3.0/users/su@example.com
+  response:
+    body: {string: !!python/unicode '{"created_on": "2005-08-01T07:49:23", "http_etag":
+        "\"b36f8ca1d91d583901c768dc116815282d469c66\"", "is_server_owner": false,
+        "self_link": "http://localhost:9001/3.0/users/2", "user_id": 2}'}
+    headers:
+      content-length: ['188']
+      content-type: [application/json; charset=utf-8]
+    status: {code: 200, message: OK}
+- request:
+    body: null
+    headers:
+      accept-encoding: ['gzip, deflate']
+    method: !!python/unicode 'GET'
+    uri: http://localhost:9001/3.0/users/2/addresses
+  response:
+    body: {string: !!python/unicode '{"entries": [{"email": "su@example.com", "http_etag":
+        "\"a8988d233ad4b9e8641ad5d75553912565efec83\"", "original_email": "su@example.com",
+        "registered_on": "2005-08-01T07:49:23", "self_link": "http://localhost:9001/3.0/addresses/su@example.com",
+        "user": "http://localhost:9001/3.0/users/2"}], "http_etag": "\"7cc723891821fbf8b0974c2ec407cca11fbb6726\"",
+        "start": 0, "total_size": 1}'}
+    headers:
+      content-length: ['381']
+      content-type: [application/json; charset=utf-8]
+    status: {code: 200, message: OK}
+- request:
+    body: null
+    headers:
+      accept-encoding: ['gzip, deflate']
+    method: !!python/unicode 'GET'
+    uri: http://localhost:9001/3.0/addresses/su@example.com
+  response:
+    body: {string: !!python/unicode '{"email": "su@example.com", "http_etag": "\"a8988d233ad4b9e8641ad5d75553912565efec83\"",
+        "original_email": "su@example.com", "registered_on": "2005-08-01T07:49:23",
+        "self_link": "http://localhost:9001/3.0/addresses/su@example.com", "user":
+        "http://localhost:9001/3.0/users/2"}'}
+    headers:
+      content-length: ['276']
+      content-type: [application/json; charset=utf-8]
+    status: {code: 200, message: OK}
+- request:
+    body: null
+    headers:
+      accept-encoding: ['gzip, deflate']
+    method: !!python/unicode 'GET'
+    uri: http://localhost:9001/3.0/lists/foo.example.com/roster/owner
+  response:
+    body: {string: !!python/unicode '{"entries": [{"address": "http://localhost:9001/3.0/addresses/su@example.com",
+        "delivery_mode": "regular", "email": "su@example.com", "http_etag": "\"50eebd88044b56c4a2073d93c0bf5c5da54f9b3c\"",
+        "list_id": "foo.example.com", "member_id": 2, "role": "owner", "self_link":
+        "http://localhost:9001/3.0/members/2", "user": "http://localhost:9001/3.0/users/2"}],
+        "http_etag": "\"902cfc083f243f174e2457cc0b5ef0e669c1cae3\"", "start": 0, "total_size":
+        1}'}
+    headers:
+      content-length: ['446']
+      content-type: [application/json; charset=utf-8]
+    status: {code: 200, message: OK}
+- request:
+    body: null
+    headers:
+      accept-encoding: ['gzip, deflate']
+    method: !!python/unicode 'GET'
+    uri: http://localhost:9001/3.0/lists/foo@example.com
+  response:
+    body: {string: !!python/unicode '{"display_name": "Foo", "fqdn_listname": "foo@example.com",
+        "http_etag": "\"698a819bbb6b902096a8c5543cc7fac2328960d5\"", "list_id": "foo.example.com",
+        "list_name": "foo", "mail_host": "example.com", "member_count": 0, "self_link":
+        "http://localhost:9001/3.0/lists/foo.example.com", "volume": 1}'}
+    headers:
+      content-length: ['294']
+      content-type: [application/json; charset=utf-8]
+    status: {code: 200, message: OK}
+- request:
+    body: null
+    headers:
+      accept-encoding: ['gzip, deflate']
+    method: !!python/unicode 'GET'
+    uri: http://localhost:9001/3.0/lists/foo.example.com/roster/owner
+  response:
+    body: {string: !!python/unicode '{"entries": [{"address": "http://localhost:9001/3.0/addresses/su@example.com",
+        "delivery_mode": "regular", "email": "su@example.com", "http_etag": "\"50eebd88044b56c4a2073d93c0bf5c5da54f9b3c\"",
+        "list_id": "foo.example.com", "member_id": 2, "role": "owner", "self_link":
+        "http://localhost:9001/3.0/members/2", "user": "http://localhost:9001/3.0/users/2"}],
+        "http_etag": "\"902cfc083f243f174e2457cc0b5ef0e669c1cae3\"", "start": 0, "total_size":
+        1}'}
+    headers:
+      content-length: ['446']
+      content-type: [application/json; charset=utf-8]
+    status: {code: 200, message: OK}
+- request:
+    body: null
+    headers:
+      accept-encoding: ['gzip, deflate']
+    method: !!python/unicode 'GET'
+    uri: http://localhost:9001/3.0/lists/foo.example.com/roster/owner
+  response:
+    body: {string: !!python/unicode '{"entries": [{"address": "http://localhost:9001/3.0/addresses/su@example.com",
+        "delivery_mode": "regular", "email": "su@example.com", "http_etag": "\"50eebd88044b56c4a2073d93c0bf5c5da54f9b3c\"",
+        "list_id": "foo.example.com", "member_id": 2, "role": "owner", "self_link":
+        "http://localhost:9001/3.0/members/2", "user": "http://localhost:9001/3.0/users/2"}],
+        "http_etag": "\"902cfc083f243f174e2457cc0b5ef0e669c1cae3\"", "start": 0, "total_size":
+        1}'}
+    headers:
+      content-length: ['446']
+      content-type: [application/json; charset=utf-8]
+    status: {code: 200, message: OK}
+version: 1
diff --git a/src/postorius/tests/mailman_api_tests/test_list_members.py b/src/postorius/tests/mailman_api_tests/test_list_members.py
index f114825..d7a6f97 100644
--- a/src/postorius/tests/mailman_api_tests/test_list_members.py
+++ b/src/postorius/tests/mailman_api_tests/test_list_members.py
@@ -121,7 +121,7 @@
     Tests creation of list owners.
     """
 
-    @MM_VCR.use_cassette('test_list_members_add_owner.yaml')
+    @MM_VCR.use_cassette('test_list_members_owner.yaml')
     def setUp(self):
         self.client = Client()
         self.mm_client = get_client()
@@ -134,12 +134,12 @@
             'su', 'su@example.com', 'pwd')
         self.client.login(username='su', password='pwd')
 
-    @MM_VCR.use_cassette('test_list_members_add_owner.yaml')
+    @MM_VCR.use_cassette('test_list_members_owner.yaml')
     def tearDown(self):
         self.foo_list.delete()
         self.su.delete()
 
-    @MM_VCR.use_cassette('test_list_members_add_owner_new_owner_added.yaml')
+    @MM_VCR.use_cassette('test_list_members_owner_add_remove.yaml')
     def test_add_remove_owner(self):
         self.client.post(
             reverse('list_members', args=('foo@example.com', )),
@@ -150,7 +150,7 @@
                                          'newowner@example.com')))
         self.assertFalse('newowner@example.com' in self.foo_list.owners)
 
-    @MM_VCR.use_cassette('test_list_members_add_owner_by_owner.yaml')
+    @MM_VCR.use_cassette('test_list_members_owner_by_owner.yaml')
     def test_remove_owner_as_owner(self):
         self.mm_client.get_list('foo@example.com').add_owner('su@example.com')
         self.assertTrue('su@example.com' in self.foo_list.owners)