diff --git a/test/fixtures/tesla_mock/mobilizon-event-leave.json b/test/fixtures/tesla_mock/mobilizon-event-leave.json
new file mode 100644
index 0000000000..04fffb125a
--- /dev/null
+++ b/test/fixtures/tesla_mock/mobilizon-event-leave.json
@@ -0,0 +1,78 @@
+{
+  "@context": [
+    "https://www.w3.org/ns/activitystreams",
+    "https://w3id.org/security/v1",
+    {
+      "addressRegion": "sc:addressRegion",
+      "timezone": { "@id": "mz:timezone", "@type": "sc:Text" },
+      "isOnline": { "@id": "mz:isOnline", "@type": "sc:Boolean" },
+      "pt": "https://joinpeertube.org/ns#",
+      "manuallyApprovesFollowers": "as:manuallyApprovesFollowers",
+      "inLanguage": "sc:inLanguage",
+      "address": { "@id": "sc:address", "@type": "sc:PostalAddress" },
+      "status": { "@id": "ical:status", "@type": "ical:status" },
+      "discoverable": "toot:discoverable",
+      "repliesModerationOption": {
+        "@id": "mz:repliesModerationOption",
+        "@type": "mz:repliesModerationOptionType"
+      },
+      "sc": "http://schema.org#",
+      "mz": "https://joinmobilizon.org/ns#",
+      "category": "sc:category",
+      "joinModeType": { "@id": "mz:joinModeType", "@type": "rdfs:Class" },
+      "Hashtag": "as:Hashtag",
+      "propertyID": "sc:propertyID",
+      "PostalAddress": "sc:PostalAddress",
+      "discussions": { "@id": "mz:discussions", "@type": "@id" },
+      "remainingAttendeeCapacity": "sc:remainingAttendeeCapacity",
+      "streetAddress": "sc:streetAddress",
+      "anonymousParticipationEnabled": {
+        "@id": "mz:anonymousParticipationEnabled",
+        "@type": "sc:Boolean"
+      },
+      "externalParticipationUrl": {
+        "@id": "mz:externalParticipationUrl",
+        "@type": "sc:URL"
+      },
+      "addressLocality": "sc:addressLocality",
+      "joinMode": { "@id": "mz:joinMode", "@type": "mz:joinModeType" },
+      "location": { "@id": "sc:location", "@type": "sc:Place" },
+      "toot": "http://joinmastodon.org/ns#",
+      "participantCount": {
+        "@id": "mz:participantCount",
+        "@type": "sc:Integer"
+      },
+      "uuid": "sc:identifier",
+      "maximumAttendeeCapacity": "sc:maximumAttendeeCapacity",
+      "participationMessage": {
+        "@id": "mz:participationMessage",
+        "@type": "sc:Text"
+      },
+      "openness": { "@id": "mz:openness", "@type": "@id" },
+      "members": { "@id": "mz:members", "@type": "@id" },
+      "events": { "@id": "mz:events", "@type": "@id" },
+      "resources": { "@id": "mz:resources", "@type": "@id" },
+      "addressCountry": "sc:addressCountry",
+      "posts": { "@id": "mz:posts", "@type": "@id" },
+      "commentsEnabled": {
+        "@id": "pt:commentsEnabled",
+        "@type": "sc:Boolean"
+      },
+      "value": "sc:value",
+      "PropertyValue": "sc:PropertyValue",
+      "repliesModerationOptionType": {
+        "@id": "mz:repliesModerationOptionType",
+        "@type": "rdfs:Class"
+      },
+      "todos": { "@id": "mz:todos", "@type": "@id" },
+      "ical": "http://www.w3.org/2002/12/cal/ical#",
+      "postalCode": "sc:postalCode",
+      "memberCount": { "@id": "mz:memberCount", "@type": "sc:Integer" },
+      "@language": "und"
+    }
+  ],
+  "actor": "https://mobilizon.org/@tcit",
+  "id": "https://mobilizon.mkljczk.pl/leave/event/d1828aac-b57f-43c9-ac87-17388fab2bc8",
+  "object": "https://pleroma.mkljczk.pl/objects/b800bdb9-2cbb-40b6-9b29-196cfbd42398",
+  "type": "Leave"
+}
diff --git a/test/pleroma/web/activity_pub/transmogrifier/leave_handling_test.exs b/test/pleroma/web/activity_pub/transmogrifier/leave_handling_test.exs
new file mode 100644
index 0000000000..34620a878c
--- /dev/null
+++ b/test/pleroma/web/activity_pub/transmogrifier/leave_handling_test.exs
@@ -0,0 +1,51 @@
+# 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.Transmogrifier.LeaveHandlingTest do
+  use Pleroma.DataCase
+
+  alias Pleroma.Activity
+  alias Pleroma.Object
+  alias Pleroma.Repo
+  alias Pleroma.Web.ActivityPub.Builder
+  alias Pleroma.Web.ActivityPub.Pipeline
+  alias Pleroma.Web.ActivityPub.SideEffects
+  alias Pleroma.Web.ActivityPub.Transmogrifier
+
+  import Pleroma.Factory
+
+  setup_all do
+    Tesla.Mock.mock_global(fn env -> apply(HttpRequestMock, :request, [env]) end)
+    :ok
+  end
+
+  describe "handle_incoming" do
+    test "it works for incoming Mobilizon leaves" do
+      user = insert(:user)
+
+      event = insert(:event)
+
+      {:ok, join_activity, _} = Builder.join(user, event)
+      {:ok, join_activity, _} = Pipeline.common_pipeline(join_activity, local: true)
+      {:ok, _, _} = SideEffects.handle(join_activity, local: true)
+
+      event = Object.get_by_id(event.id)
+
+      assert length(event.data["participations"]) === 1
+
+      leave_data =
+        File.read!("test/fixtures/tesla_mock/mobilizon-event-leave.json")
+        |> Jason.decode!()
+        |> Map.put("actor", user.ap_id)
+        |> Map.put("object", event.data["id"])
+
+      {:ok, %Activity{local: false} = _activity} = Transmogrifier.handle_incoming(leave_data)
+
+      event = Object.get_by_id(event.id)
+
+      assert length(event.data["participations"]) === 0
+      refute Repo.get(Activity, join_activity.id)
+    end
+  end
+end
diff --git a/uploads/.gitignore b/uploads/.gitignore
deleted file mode 100644
index 523e584a70..0000000000
--- a/uploads/.gitignore
+++ /dev/null
@@ -1,3 +0,0 @@
-# Git will ignore everything in this directory except this file.
-*
-!.gitignore