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diff --git a/test/pleroma/web/activity_pub/side_effects/delete_test.exs b/test/pleroma/web/activity_pub/side_effects/delete_test.exs
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+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2021 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.Web.ActivityPub.SideEffects.DeleteTest do
+  use Oban.Testing, repo: Pleroma.Repo
+  use Pleroma.DataCase, async: true
+
+  alias Pleroma.Activity
+  alias Pleroma.Object
+  alias Pleroma.Repo
+  alias Pleroma.Tests.ObanHelpers
+  alias Pleroma.User
+  alias Pleroma.Web.ActivityPub.ActivityPub
+  alias Pleroma.Web.ActivityPub.Builder
+  alias Pleroma.Web.ActivityPub.SideEffects
+  alias Pleroma.Web.CommonAPI
+
+  alias Pleroma.LoggerMock
+  alias Pleroma.Web.ActivityPub.ActivityPubMock
+
+  import Mox
+  import Pleroma.Factory
+
+  describe "user deletion" do
+    setup do
+      user = insert(:user)
+
+      {:ok, delete_user_data, _meta} = Builder.delete(user, user.ap_id)
+      {:ok, delete_user, _meta} = ActivityPub.persist(delete_user_data, local: true)
+
+      %{
+        user: user,
+        delete_user: delete_user
+      }
+    end
+
+    test "it handles user deletions", %{delete_user: delete, user: user} do
+      {:ok, _delete, _} = SideEffects.handle(delete)
+      ObanHelpers.perform_all()
+
+      refute User.get_cached_by_ap_id(user.ap_id).is_active
+    end
+  end
+
+  describe "object deletion" do
+    setup do
+      user = insert(:user)
+      other_user = insert(:user)
+
+      {:ok, op} = CommonAPI.post(other_user, %{status: "big oof"})
+      {:ok, post} = CommonAPI.post(user, %{status: "hey", in_reply_to_id: op})
+      {:ok, favorite} = CommonAPI.favorite(user, post.id)
+      object = Object.normalize(post, fetch: false)
+      {:ok, delete_data, _meta} = Builder.delete(user, object.data["id"])
+      {:ok, delete, _meta} = ActivityPub.persist(delete_data, local: true)
+
+      %{
+        user: user,
+        delete: delete,
+        post: post,
+        object: object,
+        op: op,
+        favorite: favorite
+      }
+    end
+
+    test "it handles object deletions", %{
+      delete: delete,
+      post: post,
+      object: object,
+      user: user,
+      op: op,
+      favorite: favorite
+    } do
+      object_id = object.id
+      user_id = user.id
+
+      ActivityPubMock
+      |> expect(:stream_out, fn ^delete -> nil end)
+      |> expect(:stream_out_participations, fn %Object{id: ^object_id}, %User{id: ^user_id} ->
+        nil
+      end)
+
+      {:ok, _delete, _} = SideEffects.handle(delete)
+      user = User.get_cached_by_ap_id(object.data["actor"])
+
+      object = Object.get_by_id(object.id)
+      assert object.data["type"] == "Tombstone"
+      refute Activity.get_by_id(post.id)
+      refute Activity.get_by_id(favorite.id)
+
+      user = User.get_by_id(user.id)
+      assert user.note_count == 0
+
+      object = Object.normalize(op.data["object"], fetch: false)
+
+      assert object.data["repliesCount"] == 0
+    end
+
+    test "it handles object deletions when the object itself has been pruned", %{
+      delete: delete,
+      post: post,
+      object: object,
+      user: user,
+      op: op
+    } do
+      object_id = object.id
+      user_id = user.id
+
+      ActivityPubMock
+      |> expect(:stream_out, fn ^delete -> nil end)
+      |> expect(:stream_out_participations, fn %Object{id: ^object_id}, %User{id: ^user_id} ->
+        nil
+      end)
+
+      {:ok, _delete, _} = SideEffects.handle(delete)
+      user = User.get_cached_by_ap_id(object.data["actor"])
+
+      object = Object.get_by_id(object.id)
+      assert object.data["type"] == "Tombstone"
+      refute Activity.get_by_id(post.id)
+
+      user = User.get_by_id(user.id)
+      assert user.note_count == 0
+
+      object = Object.normalize(op.data["object"], fetch: false)
+
+      assert object.data["repliesCount"] == 0
+    end
+
+    test "it logs issues with objects deletion", %{
+      delete: delete,
+      object: object
+    } do
+      {:ok, _object} =
+        object
+        |> Object.change(%{data: Map.delete(object.data, "actor")})
+        |> Repo.update()
+
+      LoggerMock
+      |> expect(:error, fn str -> assert str =~ "The object doesn't have an actor" end)
+
+      {:error, :no_object_actor} = SideEffects.handle(delete)
+    end
+  end
+end