diff --git a/hc/api/models.py b/hc/api/models.py
index d2c1b601..e35058d3 100644
--- a/hc/api/models.py
+++ b/hc/api/models.py
@@ -141,7 +141,7 @@ class Channel(models.Model):
         elif self.kind == "pd":
             return transports.PagerDuty(self)
         elif self.kind == "po":
-            return transports.Pushover()
+            return transports.Pushover(self)
         else:
             raise NotImplementedError("Unknown channel kind: %s" % self.kind)
 
diff --git a/hc/api/tests/test_notify.py b/hc/api/tests/test_notify.py
index a3f1afe8..3101c075 100644
--- a/hc/api/tests/test_notify.py
+++ b/hc/api/tests/test_notify.py
@@ -131,6 +131,19 @@ class NotifyTestCase(BaseTestCase):
     @patch("hc.api.transports.requests.post")
     def test_hipchat(self, mock_post):
         self._setup_data("hipchat", "123")
+        mock_post.return_value.status_code = 204
+
+        self.channel.notify(self.check)
+        n = Notification.objects.first()
+        self.assertEqual(n.error, "")
+
+        args, kwargs = mock_post.call_args
+        json = kwargs["json"]
+        self.assertIn("DOWN", json["message"])
+
+    @patch("hc.api.transports.requests.post")
+    def test_pushover(self, mock_post):
+        self._setup_data("po", "123|0")
         mock_post.return_value.status_code = 200
 
         self.channel.notify(self.check)
@@ -138,4 +151,4 @@ class NotifyTestCase(BaseTestCase):
 
         args, kwargs = mock_post.call_args
         json = kwargs["json"]
-        self.assertIn("DOWN", json["message"])
+        self.assertIn("DOWN", json["title"])
diff --git a/hc/api/transports.py b/hc/api/transports.py
index 0e21d466..b6a3ffd9 100644
--- a/hc/api/transports.py
+++ b/hc/api/transports.py
@@ -67,7 +67,7 @@ class Webhook(Transport):
         headers = {"User-Agent": "healthchecks.io"}
         try:
             r = requests.get(self.channel.value, timeout=5, headers=headers)
-            if r.status_code not in (200, 201):
+            if r.status_code not in (200, 201, 204):
                 return "Received status code %d" % r.status_code
         except requests.exceptions.Timeout:
             # Well, we tried
@@ -81,7 +81,7 @@ class JsonTransport(Transport):
         headers = {"User-Agent": "healthchecks.io"}
         try:
             r = requests.post(url, json=payload, timeout=5, headers=headers)
-            if r.status_code not in (200, 201):
+            if r.status_code not in (200, 201, 204):
                 return "Received status code %d" % r.status_code
         except requests.exceptions.Timeout:
             # Well, we tried