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diff --git a/test/pleroma/web/activity_pub/mrf/anti_mention_spam_policy_test.exs b/test/pleroma/web/activity_pub/mrf/anti_mention_spam_policy_test.exs
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+++ b/test/pleroma/web/activity_pub/mrf/anti_mention_spam_policy_test.exs
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+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2022 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.Web.ActivityPub.MRF.AntiMentionSpamPolicyTest do
+  use Pleroma.DataCase
+  import Pleroma.Factory
+  alias Pleroma.Web.ActivityPub.MRF.AntiMentionSpamPolicy
+
+  test "it allows posts without mentions" do
+    user = insert(:user, local: false)
+    assert user.note_count == 0
+
+    message = %{
+      "type" => "Create",
+      "actor" => user.ap_id
+    }
+
+    {:ok, _message} = AntiMentionSpamPolicy.filter(message)
+  end
+
+  test "it allows posts from users with followers, posts, and age" do
+    user =
+      insert(:user,
+        local: false,
+        follower_count: 1,
+        note_count: 1,
+        inserted_at: ~N[1970-01-01 00:00:00]
+      )
+
+    message = %{
+      "type" => "Create",
+      "actor" => user.ap_id
+    }
+
+    {:ok, _message} = AntiMentionSpamPolicy.filter(message)
+  end
+
+  test "it allows posts from local users" do
+    user = insert(:user, local: true)
+
+    message = %{
+      "type" => "Create",
+      "actor" => user.ap_id
+    }
+
+    {:ok, _message} = AntiMentionSpamPolicy.filter(message)
+  end
+
+  test "it rejects posts with mentions from users without followers" do
+    user = insert(:user, local: false, follower_count: 0)
+
+    message = %{
+      "type" => "Create",
+      "actor" => user.ap_id,
+      "object" => %{
+        "to" => ["https://pleroma.soykaf.com/users/1"],
+        "cc" => ["https://pleroma.soykaf.com/users/1"],
+        "actor" => user.ap_id
+      }
+    }
+
+    {:reject, _message} = AntiMentionSpamPolicy.filter(message)
+  end
+end