diff --git a/test/federation/activity_pub/types/actors_test.exs b/test/federation/activity_pub/types/actors_test.exs
new file mode 100644
index 000000000..113ca1eb4
--- /dev/null
+++ b/test/federation/activity_pub/types/actors_test.exs
@@ -0,0 +1,92 @@
+defmodule Mobilizon.Federation.ActivityPub.Types.ActorsTest do
+  use Mobilizon.DataCase
+
+  import Mobilizon.Factory
+
+  alias Mobilizon.Actors.Actor
+  alias Mobilizon.Federation.ActivityPub.Types.Actors
+
+  describe "group creation" do
+    test "with no public key" do
+      %Actor{id: creator_actor_id} = insert(:actor)
+
+      assert_raise RuntimeError, "No publickey found in private keys", fn ->
+        Actors.create(
+          %{
+            preferred_username: "hello",
+            summary: "hi",
+            url: "https://some-unique-url.test/@actor",
+            keys: "yool",
+            creator_actor_id: creator_actor_id
+          },
+          %{}
+        )
+      end
+    end
+
+    test "with XSS" do
+      %Actor{id: creator_actor_id} = insert(:actor)
+
+      preferred_username =
+        "hello <meta http-equiv=\"refresh\" content=\"0; url=http://example.com/\" />"
+
+      summary =
+        "<p>Some text before <meta http-equiv=\"refresh\" content=\"0; url=http://example.com/\" /></p>"
+
+      assert {:ok, %Actor{preferred_username: saved_preferred_username, summary: saved_summary},
+              _} =
+               Actors.create(
+                 %{
+                   preferred_username: preferred_username,
+                   summary: summary,
+                   url: "https://some-unique-url.test/@actor",
+                   creator_actor_id: creator_actor_id,
+                   type: :Group
+                 },
+                 %{}
+               )
+
+      assert saved_preferred_username == "hello"
+      assert saved_summary == "<p>Some text before </p>"
+
+      preferred_username =
+        "<<img src=''/>meta http-equiv=\"refresh\" content=\"0; url=http://example.com/\" />"
+
+      summary =
+        "<<img src=''/>meta http-equiv=\"refresh\" content=\"0; url=http://example.com/\" />"
+
+      assert {:error, %Ecto.Changeset{errors: errors}} =
+               Actors.create(
+                 %{
+                   preferred_username: preferred_username,
+                   summary: summary,
+                   url: "https://some-unique-url.test/@actor",
+                   creator_actor_id: creator_actor_id,
+                   type: :Group
+                 },
+                 %{}
+               )
+
+      assert errors === [
+               preferred_username:
+                 {"Username must only contain alphanumeric lowercased characters and underscores.",
+                  []}
+             ]
+
+      assert {:ok, %Actor{summary: saved_summary}, _} =
+               Actors.create(
+                 %{
+                   preferred_username: "hello184",
+                   summary: summary,
+                   url: "https://some-unique-url.test/@actor",
+                   creator_actor_id: creator_actor_id,
+                   type: :Group
+                 },
+                 %{}
+               )
+
+      assert saved_summary ==
+               "&lt;<img src=\"\"/>meta http-equiv=&quot;refresh&quot; content=&quot;0; url=http://example.com/&quot; /&gt;"
+    end
+  end
+end