diff --git a/tests/test_api.py b/tests/test_api.py
index d30eb56..4aedd37 100644
--- a/tests/test_api.py
+++ b/tests/test_api.py
@@ -2,79 +2,76 @@
 import pytest
 import requests
 
+from requests import Request
+
 from toot import App, CLIENT_NAME, CLIENT_WEBSITE
 from toot.api import create_app, login, SCOPES, AuthenticationError
-from tests.utils import MockResponse
+from tests.utils import MockResponse, Expectations
 
 
 def test_create_app(monkeypatch):
-    response = {
-        'client_id': 'foo',
-        'client_secret': 'bar',
-    }
+    request = Request('POST', 'http://bigfish.software/api/v1/apps',
+                      data={'website': CLIENT_WEBSITE,
+                            'client_name': CLIENT_NAME,
+                            'scopes': SCOPES,
+                            'redirect_uris': 'urn:ietf:wg:oauth:2.0:oob'})
 
-    def mock_post(url, data):
-        assert url == 'https://bigfish.software/api/v1/apps'
-        assert data == {
-            'website': CLIENT_WEBSITE,
-            'client_name': CLIENT_NAME,
-            'scopes': SCOPES,
-            'redirect_uris': 'urn:ietf:wg:oauth:2.0:oob'
-        }
-        return MockResponse(response)
+    response = MockResponse({'client_id': 'foo',
+                             'client_secret': 'bar'})
 
-    monkeypatch.setattr(requests, 'post', mock_post)
+    e = Expectations()
+    e.add(request, response)
+    e.patch(monkeypatch)
 
-    assert create_app('bigfish.software') == response
+    create_app('bigfish.software')
 
 
 def test_login(monkeypatch):
     app = App('bigfish.software', 'https://bigfish.software', 'foo', 'bar')
 
-    response = {
+    data = {
+        'grant_type': 'password',
+        'client_id': app.client_id,
+        'client_secret': app.client_secret,
+        'username': 'user',
+        'password': 'pass',
+        'scope': SCOPES,
+    }
+
+    request = Request('POST', 'https://bigfish.software/oauth/token', data=data)
+
+    response = MockResponse({
         'token_type': 'bearer',
         'scope': 'read write follow',
         'access_token': 'xxx',
         'created_at': 1492523699
-    }
+    })
 
-    def mock_post(url, data, allow_redirects):
-        assert not allow_redirects
-        assert url == 'https://bigfish.software/oauth/token'
-        assert data == {
-            'grant_type': 'password',
-            'client_id': app.client_id,
-            'client_secret': app.client_secret,
-            'username': 'user',
-            'password': 'pass',
-            'scope': SCOPES,
-        }
+    e = Expectations()
+    e.add(request, response)
+    e.patch(monkeypatch)
 
-        return MockResponse(response)
-
-    monkeypatch.setattr(requests, 'post', mock_post)
-
-    assert login(app, 'user', 'pass') == response
+    login(app, 'user', 'pass')
 
 
 def test_login_failed(monkeypatch):
     app = App('bigfish.software', 'https://bigfish.software', 'foo', 'bar')
 
-    def mock_post(url, data, allow_redirects):
-        assert not allow_redirects
-        assert url == 'https://bigfish.software/oauth/token'
-        assert data == {
-            'grant_type': 'password',
-            'client_id': app.client_id,
-            'client_secret': app.client_secret,
-            'username': 'user',
-            'password': 'pass',
-            'scope': SCOPES,
-        }
+    data = {
+        'grant_type': 'password',
+        'client_id': app.client_id,
+        'client_secret': app.client_secret,
+        'username': 'user',
+        'password': 'pass',
+        'scope': SCOPES,
+    }
 
-        return MockResponse(is_redirect=True)
+    request = Request('POST', 'https://bigfish.software/oauth/token', data=data)
+    response = MockResponse(is_redirect=True)
 
-    monkeypatch.setattr(requests, 'post', mock_post)
+    e = Expectations()
+    e.add(request, response)
+    e.patch(monkeypatch)
 
     with pytest.raises(AuthenticationError):
         login(app, 'user', 'pass')
diff --git a/tests/test_auth.py b/tests/test_auth.py
index 851eada..2d1d501 100644
--- a/tests/test_auth.py
+++ b/tests/test_auth.py
@@ -15,6 +15,7 @@ def test_register_app(monkeypatch):
         assert app.client_secret == "cs"
 
     monkeypatch.setattr(api, 'create_app', retval(app_data))
+    monkeypatch.setattr(api, 'get_instance', retval({"title": "foo", "version": "1"}))
     monkeypatch.setattr(config, 'save_app', assert_app)
 
     app = auth.register_app("foo.bar")
diff --git a/tests/test_console.py b/tests/test_console.py
index 94dd547..0c6ff31 100644
--- a/tests/test_console.py
+++ b/tests/test_console.py
@@ -3,10 +3,12 @@ import pytest
 import requests
 import re
 
+from requests import Request
+
 from toot import console, User, App
 from toot.exceptions import ConsoleError
 
-from tests.utils import MockResponse
+from tests.utils import MockResponse, Expectations
 
 app = App('habunek.com', 'https://habunek.com', 'foo', 'bar')
 user = User('habunek.com', 'ivan@habunek.com', 'xxx')
@@ -34,7 +36,7 @@ def test_post_defaults(monkeypatch, capsys):
             'media_ids[]': None,
         }
 
-    def mock_send(*args):
+    def mock_send(*args, **kwargs):
         return MockResponse({
             'url': 'http://ivan.habunek.com/'
         })
@@ -59,7 +61,7 @@ def test_post_with_options(monkeypatch, capsys):
             'media_ids[]': None,
         }
 
-    def mock_send(*args):
+    def mock_send(*args, **kwargs):
         return MockResponse({
             'url': 'http://ivan.habunek.com/'
         })
@@ -96,11 +98,12 @@ def test_post_invalid_media(monkeypatch, capsys):
 
 
 def test_timeline(monkeypatch, capsys):
-    def mock_get(url, params, headers=None):
-        assert url == 'https://habunek.com/api/v1/timelines/home'
-        assert headers == {'Authorization': 'Bearer xxx'}
-        assert params is None
+    def mock_prepare(request):
+        assert request.url == 'https://habunek.com/api/v1/timelines/home'
+        assert request.headers == {'Authorization': 'Bearer xxx'}
+        assert request.params == {}
 
+    def mock_send(*args, **kwargs):
         return MockResponse([{
             'account': {
                 'display_name': 'Frank Zappa',
@@ -111,7 +114,8 @@ def test_timeline(monkeypatch, capsys):
             'reblog': None,
         }])
 
-    monkeypatch.setattr(requests, 'get', mock_get)
+    monkeypatch.setattr(requests.Request, 'prepare', mock_prepare)
+    monkeypatch.setattr(requests.Session, 'send', mock_send)
 
     console.run_command(app, user, 'timeline', [])
 
@@ -127,7 +131,7 @@ def test_upload(monkeypatch, capsys):
         assert request.headers == {'Authorization': 'Bearer xxx'}
         assert request.files.get('file') is not None
 
-    def mock_send(*args):
+    def mock_send(*args, **kwargs):
         return MockResponse({
             'id': 123,
             'url': 'https://bigfish.software/123/456',
@@ -147,14 +151,15 @@ def test_upload(monkeypatch, capsys):
 
 
 def test_search(monkeypatch, capsys):
-    def mock_get(url, params, headers=None):
-        assert url == 'https://habunek.com/api/v1/search'
-        assert headers == {'Authorization': 'Bearer xxx'}
-        assert params == {
+    def mock_prepare(request):
+        assert request.url == 'https://habunek.com/api/v1/search'
+        assert request.headers == {'Authorization': 'Bearer xxx'}
+        assert request.params == {
             'q': 'freddy',
             'resolve': False,
         }
 
+    def mock_send(*args, **kwargs):
         return MockResponse({
             'hashtags': ['foo', 'bar', 'baz'],
             'accounts': [{
@@ -167,7 +172,8 @@ def test_search(monkeypatch, capsys):
             'statuses': [],
         })
 
-    monkeypatch.setattr(requests, 'get', mock_get)
+    monkeypatch.setattr(requests.Request, 'prepare', mock_prepare)
+    monkeypatch.setattr(requests.Session, 'send', mock_send)
 
     console.run_command(app, user, 'search', ['freddy'])
 
@@ -179,25 +185,20 @@ def test_search(monkeypatch, capsys):
 
 
 def test_follow(monkeypatch, capsys):
-    def mock_get(url, params, headers):
-        assert url == 'https://habunek.com/api/v1/accounts/search'
-        assert params == {'q': 'blixa'}
-        assert headers == {'Authorization': 'Bearer xxx'}
+    req1 = Request('GET', 'https://habunek.com/api/v1/accounts/search',
+                   params={'q': 'blixa'},
+                   headers={'Authorization': 'Bearer xxx'})
+    res1 = MockResponse([
+        {'id': 123, 'acct': 'blixa@other.acc'},
+        {'id': 321, 'acct': 'blixa'},
+    ])
 
-        return MockResponse([
-            {'id': 123, 'acct': 'blixa@other.acc'},
-            {'id': 321, 'acct': 'blixa'},
-        ])
+    req2 = Request('POST', 'https://habunek.com/api/v1/accounts/321/follow',
+                   headers={'Authorization': 'Bearer xxx'})
+    res2 = MockResponse()
 
-    def mock_prepare(request):
-        assert request.url == 'https://habunek.com/api/v1/accounts/321/follow'
-
-    def mock_send(*args, **kwargs):
-        return MockResponse()
-
-    monkeypatch.setattr(requests.Request, 'prepare', mock_prepare)
-    monkeypatch.setattr(requests.Session, 'send', mock_send)
-    monkeypatch.setattr(requests, 'get', mock_get)
+    expectations = Expectations([req1, req2], [res1, res2])
+    expectations.patch(monkeypatch)
 
     console.run_command(app, user, 'follow', ['blixa'])
 
@@ -206,14 +207,12 @@ def test_follow(monkeypatch, capsys):
 
 
 def test_follow_not_found(monkeypatch, capsys):
-    def mock_get(url, params, headers):
-        assert url == 'https://habunek.com/api/v1/accounts/search'
-        assert params == {'q': 'blixa'}
-        assert headers == {'Authorization': 'Bearer xxx'}
+    req = Request('GET', 'https://habunek.com/api/v1/accounts/search',
+                  params={'q': 'blixa'}, headers={'Authorization': 'Bearer xxx'})
+    res = MockResponse()
 
-        return MockResponse([])
-
-    monkeypatch.setattr(requests, 'get', mock_get)
+    expectations = Expectations([req], [res])
+    expectations.patch(monkeypatch)
 
     with pytest.raises(ConsoleError) as ex:
         console.run_command(app, user, 'follow', ['blixa'])
@@ -221,25 +220,20 @@ def test_follow_not_found(monkeypatch, capsys):
 
 
 def test_unfollow(monkeypatch, capsys):
-    def mock_get(url, params, headers):
-        assert url == 'https://habunek.com/api/v1/accounts/search'
-        assert params == {'q': 'blixa'}
-        assert headers == {'Authorization': 'Bearer xxx'}
+    req1 = Request('GET', 'https://habunek.com/api/v1/accounts/search',
+                   params={'q': 'blixa'},
+                   headers={'Authorization': 'Bearer xxx'})
+    res1 = MockResponse([
+        {'id': 123, 'acct': 'blixa@other.acc'},
+        {'id': 321, 'acct': 'blixa'},
+    ])
 
-        return MockResponse([
-            {'id': 123, 'acct': 'blixa@other.acc'},
-            {'id': 321, 'acct': 'blixa'},
-        ])
+    req2 = Request('POST', 'https://habunek.com/api/v1/accounts/321/unfollow',
+                   headers={'Authorization': 'Bearer xxx'})
+    res2 = MockResponse()
 
-    def mock_prepare(request):
-        assert request.url == 'https://habunek.com/api/v1/accounts/321/unfollow'
-
-    def mock_send(*args, **kwargs):
-        return MockResponse()
-
-    monkeypatch.setattr(requests.Request, 'prepare', mock_prepare)
-    monkeypatch.setattr(requests.Session, 'send', mock_send)
-    monkeypatch.setattr(requests, 'get', mock_get)
+    expectations = Expectations([req1, req2], [res1, res2])
+    expectations.patch(monkeypatch)
 
     console.run_command(app, user, 'unfollow', ['blixa'])
 
@@ -248,14 +242,12 @@ def test_unfollow(monkeypatch, capsys):
 
 
 def test_unfollow_not_found(monkeypatch, capsys):
-    def mock_get(url, params, headers):
-        assert url == 'https://habunek.com/api/v1/accounts/search'
-        assert params == {'q': 'blixa'}
-        assert headers == {'Authorization': 'Bearer xxx'}
+    req = Request('GET', 'https://habunek.com/api/v1/accounts/search',
+                  params={'q': 'blixa'}, headers={'Authorization': 'Bearer xxx'})
+    res = MockResponse([])
 
-        return MockResponse([])
-
-    monkeypatch.setattr(requests, 'get', mock_get)
+    expectations = Expectations([req], [res])
+    expectations.patch(monkeypatch)
 
     with pytest.raises(ConsoleError) as ex:
         console.run_command(app, user, 'unfollow', ['blixa'])
@@ -263,30 +255,29 @@ def test_unfollow_not_found(monkeypatch, capsys):
 
 
 def test_whoami(monkeypatch, capsys):
-    def mock_get(url, params, headers=None):
-        assert url == 'https://habunek.com/api/v1/accounts/verify_credentials'
-        assert headers == {'Authorization': 'Bearer xxx'}
-        assert params is None
+    req = Request('GET', 'https://habunek.com/api/v1/accounts/verify_credentials',
+                  headers={'Authorization': 'Bearer xxx'})
 
-        return MockResponse({
-            'acct': 'ihabunek',
-            'avatar': 'https://files.mastodon.social/accounts/avatars/000/046/103/original/6a1304e135cac514.jpg?1491312434',
-            'avatar_static': 'https://files.mastodon.social/accounts/avatars/000/046/103/original/6a1304e135cac514.jpg?1491312434',
-            'created_at': '2017-04-04T13:23:09.777Z',
-            'display_name': 'Ivan Habunek',
-            'followers_count': 5,
-            'following_count': 9,
-            'header': '/headers/original/missing.png',
-            'header_static': '/headers/original/missing.png',
-            'id': 46103,
-            'locked': False,
-            'note': 'A developer.',
-            'statuses_count': 19,
-            'url': 'https://mastodon.social/@ihabunek',
-            'username': 'ihabunek'
-        })
+    res = MockResponse({
+        'acct': 'ihabunek',
+        'avatar': 'https://files.mastodon.social/accounts/avatars/000/046/103/original/6a1304e135cac514.jpg?1491312434',
+        'avatar_static': 'https://files.mastodon.social/accounts/avatars/000/046/103/original/6a1304e135cac514.jpg?1491312434',
+        'created_at': '2017-04-04T13:23:09.777Z',
+        'display_name': 'Ivan Habunek',
+        'followers_count': 5,
+        'following_count': 9,
+        'header': '/headers/original/missing.png',
+        'header_static': '/headers/original/missing.png',
+        'id': 46103,
+        'locked': False,
+        'note': 'A developer.',
+        'statuses_count': 19,
+        'url': 'https://mastodon.social/@ihabunek',
+        'username': 'ihabunek'
+    })
 
-    monkeypatch.setattr(requests, 'get', mock_get)
+    expectations = Expectations([req], [res])
+    expectations.patch(monkeypatch)
 
     console.run_command(app, user, 'whoami', [])
 
diff --git a/tests/utils.py b/tests/utils.py
index 34e0958..16b9332 100644
--- a/tests/utils.py
+++ b/tests/utils.py
@@ -1,3 +1,31 @@
+import requests
+
+
+class Expectations():
+    """Helper for mocking http requests"""
+    def __init__(self, requests=[], responses=[]):
+        self.requests = requests
+        self.responses = responses
+
+    def mock_prepare(self, request):
+        expected = self.requests.pop(0)
+        assert request.method == expected.method
+        assert request.url == expected.url
+        assert request.data == expected.data
+        assert request.headers == expected.headers
+        assert request.params == expected.params
+
+    def mock_send(self, *args, **kwargs):
+        return self.responses.pop(0)
+
+    def add(self, req, res):
+        self.requests.append(req)
+        self.responses.append(res)
+
+    def patch(self, monkeypatch):
+        monkeypatch.setattr(requests.Session, 'prepare_request', self.mock_prepare)
+        monkeypatch.setattr(requests.Session, 'send', self.mock_send)
+
 
 class MockResponse:
     def __init__(self, response_data={}, ok=True, is_redirect=False):
diff --git a/toot/api.py b/toot/api.py
index 05a8b6c..499153a 100644
--- a/toot/api.py
+++ b/toot/api.py
@@ -1,13 +1,11 @@
 # -*- coding: utf-8 -*-
 
 import re
-import requests
 
 from urllib.parse import urlparse, urlencode
 
 from toot import http, CLIENT_NAME, CLIENT_WEBSITE
-from toot.exceptions import ApiError, AuthenticationError, NotFoundError
-from toot.utils import domain_exists
+from toot.exceptions import AuthenticationError
 
 SCOPES = 'read write follow'
 
@@ -18,31 +16,32 @@ def _account_action(app, user, account, action):
     return http.post(app, user, url).json()
 
 
-def create_app(instance):
-    base_url = 'https://' + instance
-    url = base_url + '/api/v1/apps'
+def create_app(domain):
+    url = 'http://{}/api/v1/apps'.format(domain)
 
-    response = requests.post(url, {
+    data = {
         'client_name': CLIENT_NAME,
         'redirect_uris': 'urn:ietf:wg:oauth:2.0:oob',
         'scopes': SCOPES,
         'website': CLIENT_WEBSITE,
-    })
+    }
 
-    return http.process_response(response).json()
+    return http.anon_post(url, data).json()
 
 
 def login(app, username, password):
     url = app.base_url + '/oauth/token'
 
-    response = requests.post(url, {
+    data = {
         'grant_type': 'password',
         'client_id': app.client_id,
         'client_secret': app.client_secret,
         'username': username,
         'password': password,
         'scope': SCOPES,
-    }, allow_redirects=False)
+    }
+
+    response = http.anon_post(url, data, allow_redirects=False)
 
     # If auth fails, it redirects to the login page
     if response.is_redirect:
@@ -64,13 +63,15 @@ def get_browser_login_url(app):
 def request_access_token(app, authorization_code):
     url = app.base_url + '/oauth/token'
 
-    response = requests.post(url, {
+    data = {
         'grant_type': 'authorization_code',
         'client_id': app.client_id,
         'client_secret': app.client_secret,
         'code': authorization_code,
         'redirect_uri': 'urn:ietf:wg:oauth:2.0:oob',
-    }, allow_redirects=False)
+    }
+
+    response = http.anon_post(url, data, allow_redirects=False)
 
     return http.process_response(response).json()
 
@@ -155,16 +156,6 @@ def get_notifications(app, user):
     return http.get(app, user, '/api/v1/notifications').json()
 
 
-def get_instance(app, user, domain):
-    if not domain_exists(domain):
-        raise ApiError("Domain {} not found".format(domain))
-
+def get_instance(domain):
     url = "http://{}/api/v1/instance".format(domain)
-
-    try:
-        return http.unauthorized_get(url).json()
-    except NotFoundError:
-        raise ApiError(
-            "Instance info not found at {}.\n"
-            "The given domain probably does not host a Mastodon instance.".format(url)
-        )
+    return http.anon_get(url).json()
diff --git a/toot/auth.py b/toot/auth.py
index 57405a1..bdf67cd 100644
--- a/toot/auth.py
+++ b/toot/auth.py
@@ -10,17 +10,22 @@ from toot.exceptions import ApiError, ConsoleError
 from toot.output import print_out
 
 
-def register_app(instance):
-    print_out("Registering application with <green>{}</green>".format(instance))
+def register_app(domain):
+    print_out("Looking up instance info...")
+    instance = api.get_instance(domain)
+
+    print_out("Found instance <blue>{}</blue> running Mastodon version <yellow>{}</yellow>".format(
+        instance['title'], instance['version']))
 
     try:
-        response = api.create_app(instance)
-    except Exception:
-        raise ConsoleError("Registration failed. Did you enter a valid instance?")
+        print_out("Registering application...")
+        response = api.create_app(domain)
+    except ApiError:
+        raise ConsoleError("Registration failed.")
 
-    base_url = 'https://' + instance
+    base_url = 'https://' + domain
 
-    app = App(instance, base_url, response['client_id'], response['client_secret'])
+    app = App(domain, base_url, response['client_id'], response['client_secret'])
     path = config.save_app(app)
     print_out("Application tokens saved to: <green>{}</green>\n".format(path))
 
diff --git a/toot/commands.py b/toot/commands.py
index 1716137..7cf4c86 100644
--- a/toot/commands.py
+++ b/toot/commands.py
@@ -8,8 +8,9 @@ from textwrap import TextWrapper
 
 from toot import api, config
 from toot.auth import login_interactive, login_browser_interactive, create_app_interactive
-from toot.exceptions import ConsoleError
+from toot.exceptions import ConsoleError, NotFoundError
 from toot.output import print_out, print_instance, print_account, print_search_results
+from toot.utils import assert_domain_exists
 
 
 def _print_timeline(item):
@@ -207,5 +208,13 @@ def instance(app, user, args):
     if not name:
         raise ConsoleError("Please specify instance name.")
 
-    instance = api.get_instance(app, user, name)
-    print_instance(instance)
+    assert_domain_exists(name)
+
+    try:
+        instance = api.get_instance(name)
+        print_instance(instance)
+    except NotFoundError:
+        raise ConsoleError(
+            "Instance not found at {}.\n"
+            "The given domain probably does not host a Mastodon instance.".format(name)
+        )
diff --git a/toot/http.py b/toot/http.py
index 5665bd7..87ad374 100644
--- a/toot/http.py
+++ b/toot/http.py
@@ -1,24 +1,37 @@
-import requests
-
-from toot.logging import log_request, log_response
 from requests import Request, Session
 from toot.exceptions import NotFoundError, ApiError
+from toot.logging import log_request, log_response
+
+
+def send_request(request, allow_redirects=True):
+    log_request(request)
+
+    with Session() as session:
+        prepared = session.prepare_request(request)
+        response = session.send(prepared, allow_redirects=allow_redirects)
+
+    log_response(response)
+
+    return response
+
+
+def _get_error_message(response):
+    """Attempt to extract an error message from response body"""
+    try:
+        data = response.json()
+        if "error_description" in data:
+            return data['error_description']
+        if "error" in data:
+            return data['error']
+    except Exception:
+        pass
+
+    return "Unknown error"
 
 
 def process_response(response):
-    log_response(response)
-
     if not response.ok:
-        error = "Unknown error"
-
-        try:
-            data = response.json()
-            if "error_description" in data:
-                error = data['error_description']
-            elif "error" in data:
-                error = data['error']
-        except Exception:
-            pass
+        error = _get_error_message(response)
 
         if response.status_code == 404:
             raise NotFoundError(error)
@@ -32,31 +45,31 @@ def get(app, user, url, params=None):
     url = app.base_url + url
     headers = {"Authorization": "Bearer " + user.access_token}
 
-    log_request(Request('GET', url, headers, params=params))
-
-    response = requests.get(url, params, headers=headers)
+    request = Request('GET', url, headers, params=params)
+    response = send_request(request)
 
     return process_response(response)
 
 
-def unauthorized_get(url, params=None):
-    log_request(Request('GET', url, None, params=params))
-
-    response = requests.get(url, params)
+def anon_get(url, params=None):
+    request = Request('GET', url, None, params=params)
+    response = send_request(request)
 
     return process_response(response)
 
 
-def post(app, user, url, data=None, files=None):
+def post(app, user, url, data=None, files=None, allow_redirects=True):
     url = app.base_url + url
     headers = {"Authorization": "Bearer " + user.access_token}
 
-    session = Session()
     request = Request('POST', url, headers, files, data)
-    prepared_request = request.prepare()
-
-    log_request(request)
-
-    response = session.send(prepared_request)
+    response = send_request(request, allow_redirects)
+
+    return process_response(response)
+
+
+def anon_post(url, data=None, files=None, allow_redirects=True):
+    request = Request('POST', url, {}, files, data)
+    response = send_request(request, allow_redirects)
 
     return process_response(response)
diff --git a/toot/utils.py b/toot/utils.py
index dcc7c29..55f9724 100644
--- a/toot/utils.py
+++ b/toot/utils.py
@@ -5,6 +5,8 @@ import socket
 
 from bs4 import BeautifulSoup
 
+from toot.exceptions import ConsoleError
+
 
 def get_text(html):
     """Converts html to text, strips all tags."""
@@ -50,3 +52,8 @@ def domain_exists(name):
         return True
     except OSError:
         return False
+
+
+def assert_domain_exists(domain):
+    if not domain_exists(domain):
+        raise ConsoleError("Domain {} not found".format(domain))