diff --git a/hc/front/tests/test_add_mattermost.py b/hc/front/tests/test_add_mattermost.py
index 1481462d..41e6a435 100644
--- a/hc/front/tests/test_add_mattermost.py
+++ b/hc/front/tests/test_add_mattermost.py
@@ -1,21 +1,23 @@
-from django.test.utils import override_settings
-
 from hc.api.models import Channel
 from hc.test import BaseTestCase
 
 
 class AddMattermostTestCase(BaseTestCase):
+    def setUp(self):
+        super(AddMattermostTestCase, self).setUp()
+        self.url = "/projects/%s/add_mattermost/" % self.project.code
+
     def test_instructions_work(self):
         self.client.login(username="alice@example.org", password="password")
-        r = self.client.get("/integrations/add_mattermost/")
+        r = self.client.get(self.url)
         self.assertContains(r, "Integration Settings", status_code=200)
 
     def test_it_works(self):
         form = {"value": "http://example.org"}
 
         self.client.login(username="alice@example.org", password="password")
-        r = self.client.post("/integrations/add_mattermost/", form)
-        self.assertRedirects(r, "/integrations/")
+        r = self.client.post(self.url, form)
+        self.assertRedirects(r, self.channels_url)
 
         c = Channel.objects.get()
         self.assertEqual(c.kind, "mattermost")
diff --git a/hc/front/urls.py b/hc/front/urls.py
index a8589c4d..6654eb87 100644
--- a/hc/front/urls.py
+++ b/hc/front/urls.py
@@ -31,7 +31,6 @@ channel_urls = [
     path("add_pagertree/", views.add_pagertree, name="hc-add-pagertree"),
     path("add_pagerteam/", views.add_pagerteam, name="hc-add-pagerteam"),
     path("add_slack/", views.add_slack, name="hc-add-slack"),
-    path("add_mattermost/", views.add_mattermost, name="hc-add-mattermost"),
     path("add_slack_btn/", views.add_slack_btn, name="hc-add-slack-btn"),
     path("add_pushbullet/", views.add_pushbullet, name="hc-add-pushbullet"),
     path("add_discord/", views.add_discord, name="hc-add-discord"),
@@ -61,21 +60,26 @@ channel_urls = [
     ),
 ]
 
+project_urls = [
+    path("add_email/", views.add_email, name="hc-add-email"),
+    path("add_matrix/", views.add_matrix, name="hc-add-matrix"),
+    path("add_mattermost/", views.add_mattermost, name="hc-add-mattermost"),
+    path("add_webhook/", views.add_webhook, name="hc-add-webhook"),
+    path("badges/", views.badges, name="hc-badges"),
+    path("checks/", views.my_checks, name="hc-checks"),
+    path("checks/add/", views.add_check, name="hc-add-check"),
+    path("checks/metrics/<slug:key>", views.metrics,),
+    path("metrics/<slug:key>", views.metrics, name="hc-metrics",),
+    path("checks/status/", views.status, name="hc-status"),
+    path("integrations/", views.channels, name="hc-p-channels"),
+]
+
 urlpatterns = [
     path("", views.index, name="hc-index"),
-    path("projects/<uuid:code>/checks/", views.my_checks, name="hc-checks"),
-    path("projects/<uuid:code>/badges/", views.badges, name="hc-badges"),
-    path("projects/<uuid:code>/checks/add/", views.add_check, name="hc-add-check"),
     path("checks/cron_preview/", views.cron_preview),
-    path("projects/<uuid:code>/checks/status/", views.status, name="hc-status"),
-    path("projects/<uuid:code>/checks/metrics/<slug:key>", views.metrics,),
-    path("projects/<uuid:code>/metrics/<slug:key>", views.metrics, name="hc-metrics",),
     path("checks/<uuid:code>/", include(check_urls)),
     path("integrations/", include(channel_urls)),
-    path("projects/<uuid:code>/integrations/", views.channels, name="hc-p-channels"),
-    path("projects/<uuid:code>/add_email/", views.add_email, name="hc-add-email"),
-    path("projects/<uuid:code>/add_matrix/", views.add_matrix, name="hc-add-matrix"),
-    path("projects/<uuid:code>/add_webhook/", views.add_webhook, name="hc-add-webhook"),
+    path("projects/<uuid:code>/", include(project_urls)),
     path("docs/", views.serve_doc, name="hc-docs"),
     path("docs/api/", views.docs_api, name="hc-docs-api"),
     path("docs/cron/", views.docs_cron, name="hc-docs-cron"),
diff --git a/hc/front/views.py b/hc/front/views.py
index c8b861d6..939be3ec 100644
--- a/hc/front/views.py
+++ b/hc/front/views.py
@@ -1044,21 +1044,22 @@ def add_slack(request):
 
 
 @login_required
-def add_mattermost(request):
+def add_mattermost(request, code):
+    project = _get_project_for_user(request, code)
+
     if request.method == "POST":
         form = AddUrlForm(request.POST)
         if form.is_valid():
-            channel = Channel(project=request.project, kind="mattermost")
+            channel = Channel(project=project, kind="mattermost")
             channel.value = form.cleaned_data["value"]
             channel.save()
 
             channel.assign_all_checks()
-            return redirect("hc-channels")
+            return redirect("hc-p-channels", project.code)
     else:
         form = AddUrlForm()
 
-    ctx = {"page": "channels", "form": form, "project": request.project}
-
+    ctx = {"page": "channels", "form": form, "project": project}
     return render(request, "integrations/add_mattermost.html", ctx)
 
 
diff --git a/templates/front/channels.html b/templates/front/channels.html
index 55f60ae1..b9179082 100644
--- a/templates/front/channels.html
+++ b/templates/front/channels.html
@@ -234,7 +234,7 @@
             <h2>Mattermost</h2>
             <p>High Trust Messaging for the Enterprise.</p>
 
-            <a href="{% url 'hc-add-mattermost' %}" class="btn btn-primary">Add Integration</a>
+            <a href="{% url 'hc-add-mattermost' project.code %}" class="btn btn-primary">Add Integration</a>
         </li>
 
         <li>
diff --git a/templates/integrations/add_mattermost.html b/templates/integrations/add_mattermost.html
index bebedb5d..fd3152bc 100644
--- a/templates/integrations/add_mattermost.html
+++ b/templates/integrations/add_mattermost.html
@@ -44,7 +44,7 @@
                 class="ai-guide-screenshot"
                 alt="Screenshot"
                 src="{% static 'img/integrations/setup_mattermost_2.png' %}">
-        </div>        
+        </div>
     </div>
 
     <div class="row ai-step">
@@ -63,7 +63,7 @@
 
     <h2>Integration Settings</h2>
 
-    <form method="post" class="form-horizontal" action="{% url 'hc-add-mattermost' %}">
+    <form method="post" class="form-horizontal">
         {% csrf_token %}
         <div class="form-group {{ form.value.css_classes }}">
             <label for="callback-url" class="col-sm-2 control-label">