diff --git a/plugins/Fediverse/plugin.py b/plugins/Fediverse/plugin.py
index a82cfb15e..13d30d14b 100644
--- a/plugins/Fediverse/plugin.py
+++ b/plugins/Fediverse/plugin.py
@@ -237,11 +237,15 @@ class Fediverse(callbacks.PluginRegexp):
             else:
                 return self._format_actor_fullname(author)
         elif isinstance(author, dict):
+            if author.get("type") == "Group":
+                # Typically, there is an actor named "Default <username> channel"
+                # on PeerTube, which we do not want to show.
+                return None
             if author.get("id"):
                 return self._format_author(irc, author["id"])
         elif isinstance(author, list):
             return format(
-                "%L", [self._format_author(irc, item) for item in author]
+                "%L", filter(bool, [self._format_author(irc, item) for item in author])
             )
         else:
             return "<unknown>"
diff --git a/plugins/Fediverse/test.py b/plugins/Fediverse/test.py
index 5c0b2f88b..d06c0ead7 100644
--- a/plugins/Fediverse/test.py
+++ b/plugins/Fediverse/test.py
@@ -438,15 +438,13 @@ class NetworklessFediverseTestCase(BaseFediverseTestCase):
         expected_requests = [
             (PEERTUBE_VIDEO_URL, PEERTUBE_VIDEO_DATA),
             (PEERTUBE_ACTOR_URL, PEERTUBE_ACTOR_DATA),
-            (ACTOR_URL, ACTOR_DATA),
         ]
 
         with self.mockRequests(expected_requests):
             self.assertResponse(
                 "status https://example.org/w/gABde9e210FGHre",
                 "\x02name of video\x02 (1 hour, 26 minutes, and 0 seconds) "
-                "by \x02chocobozzz\x02 (@chocobozzz@peertube.cpy.re) "
-                "and \x02someuser\x02 (@someuser@example.org): "
+                "by \x02chocobozzz\x02 (@chocobozzz@peertube.cpy.re): "
                 "description of the video with a second line",
             )