diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8692dfef2..dabc2a85a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -15,6 +15,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 - **Breaking:** removed `with_move` parameter from notifications timeline.
 
 ### Added
+- ActivityPub: Added support for existing AP ids for instances migrated from Mastodon.
 - Instance: Add `background_image` to configuration and `/api/v1/instance`
 - Instance: Extend `/api/v1/instance` with Pleroma-specific information.
 - NodeInfo: `pleroma:api/v1/notifications:include_types_filter` to the `features` list.
diff --git a/lib/pleroma/web/activity_pub/activity_pub_controller.ex b/lib/pleroma/web/activity_pub/activity_pub_controller.ex
index 62ad15d85..28727d619 100644
--- a/lib/pleroma/web/activity_pub/activity_pub_controller.ex
+++ b/lib/pleroma/web/activity_pub/activity_pub_controller.ex
@@ -21,6 +21,7 @@ defmodule Pleroma.Web.ActivityPub.ActivityPubController do
   alias Pleroma.Web.ActivityPub.UserView
   alias Pleroma.Web.ActivityPub.Utils
   alias Pleroma.Web.ActivityPub.Visibility
+  alias Pleroma.Web.Endpoint
   alias Pleroma.Web.FederatingPlug
   alias Pleroma.Web.Federator
 
@@ -75,8 +76,8 @@ defmodule Pleroma.Web.ActivityPub.ActivityPubController do
     end
   end
 
-  def object(conn, %{"uuid" => uuid}) do
-    with ap_id <- o_status_url(conn, :object, uuid),
+  def object(conn, _) do
+    with ap_id <- Endpoint.url() <> conn.request_path,
          %Object{} = object <- Object.get_cached_by_ap_id(ap_id),
          {_, true} <- {:public?, Visibility.is_public?(object)} do
       conn
@@ -101,8 +102,8 @@ defmodule Pleroma.Web.ActivityPub.ActivityPubController do
     conn
   end
 
-  def activity(conn, %{"uuid" => uuid}) do
-    with ap_id <- o_status_url(conn, :activity, uuid),
+  def activity(conn, _params) do
+    with ap_id <- Endpoint.url() <> conn.request_path,
          %Activity{} = activity <- Activity.normalize(ap_id),
          {_, true} <- {:public?, Visibility.is_public?(activity)} do
       conn
diff --git a/lib/pleroma/web/admin_api/admin_api_controller.ex b/lib/pleroma/web/admin_api/controllers/admin_api_controller.ex
similarity index 89%
rename from lib/pleroma/web/admin_api/admin_api_controller.ex
rename to lib/pleroma/web/admin_api/controllers/admin_api_controller.ex
index 647ceb3ba..6b1d64a2e 100644
--- a/lib/pleroma/web/admin_api/admin_api_controller.ex
+++ b/lib/pleroma/web/admin_api/controllers/admin_api_controller.ex
@@ -98,13 +98,7 @@ defmodule Pleroma.Web.AdminAPI.AdminAPIController do
   plug(
     OAuthScopesPlug,
     %{scopes: ["read:statuses"], admin: true}
-    when action in [:list_statuses, :list_user_statuses, :list_instance_statuses, :status_show]
-  )
-
-  plug(
-    OAuthScopesPlug,
-    %{scopes: ["write:statuses"], admin: true}
-    when action in [:status_update, :status_delete]
+    when action in [:list_user_statuses, :list_instance_statuses]
   )
 
   plug(
@@ -136,7 +130,7 @@ defmodule Pleroma.Web.AdminAPI.AdminAPIController do
          ]
   )
 
-  action_fallback(:errors)
+  action_fallback(AdminAPI.FallbackController)
 
   def user_delete(conn, %{"nickname" => nickname}) do
     user_delete(conn, %{"nicknames" => [nickname]})
@@ -597,16 +591,10 @@ defmodule Pleroma.Web.AdminAPI.AdminAPIController do
       json_response(conn, :no_content, "")
     else
       {:registrations_open, _} ->
-        errors(
-          conn,
-          {:error, "To send invites you need to set the `registrations_open` option to false."}
-        )
+        {:error, "To send invites you need to set the `registrations_open` option to false."}
 
       {:invites_enabled, _} ->
-        errors(
-          conn,
-          {:error, "To send invites you need to set the `invites_enabled` option to true."}
-        )
+        {:error, "To send invites you need to set the `invites_enabled` option to true."}
     end
   end
 
@@ -814,71 +802,6 @@ defmodule Pleroma.Web.AdminAPI.AdminAPIController do
     end
   end
 
-  def list_statuses(%{assigns: %{user: _admin}} = conn, params) do
-    godmode = params["godmode"] == "true" || params["godmode"] == true
-    local_only = params["local_only"] == "true" || params["local_only"] == true
-    with_reblogs = params["with_reblogs"] == "true" || params["with_reblogs"] == true
-    {page, page_size} = page_params(params)
-
-    activities =
-      ActivityPub.fetch_statuses(nil, %{
-        "godmode" => godmode,
-        "local_only" => local_only,
-        "limit" => page_size,
-        "offset" => (page - 1) * page_size,
-        "exclude_reblogs" => !with_reblogs && "true"
-      })
-
-    conn
-    |> put_view(AdminAPI.StatusView)
-    |> render("index.json", %{activities: activities, as: :activity})
-  end
-
-  def status_show(conn, %{"id" => id}) do
-    with %Activity{} = activity <- Activity.get_by_id(id) do
-      conn
-      |> put_view(MastodonAPI.StatusView)
-      |> render("show.json", %{activity: activity})
-    else
-      _ -> errors(conn, {:error, :not_found})
-    end
-  end
-
-  def status_update(%{assigns: %{user: admin}} = conn, %{"id" => id} = params) do
-    params =
-      params
-      |> Map.take(["sensitive", "visibility"])
-      |> Map.new(fn {key, value} -> {String.to_existing_atom(key), value} end)
-
-    with {:ok, activity} <- CommonAPI.update_activity_scope(id, params) do
-      {:ok, sensitive} = Ecto.Type.cast(:boolean, params[:sensitive])
-
-      ModerationLog.insert_log(%{
-        action: "status_update",
-        actor: admin,
-        subject: activity,
-        sensitive: sensitive,
-        visibility: params[:visibility]
-      })
-
-      conn
-      |> put_view(MastodonAPI.StatusView)
-      |> render("show.json", %{activity: activity})
-    end
-  end
-
-  def status_delete(%{assigns: %{user: user}} = conn, %{"id" => id}) do
-    with {:ok, %Activity{}} <- CommonAPI.delete(id, user) do
-      ModerationLog.insert_log(%{
-        action: "status_delete",
-        actor: user,
-        subject_id: id
-      })
-
-      json(conn, %{})
-    end
-  end
-
   def list_log(conn, params) do
     {page, page_size} = page_params(params)
 
@@ -904,7 +827,7 @@ defmodule Pleroma.Web.AdminAPI.AdminAPIController do
   end
 
   def config_show(conn, %{"only_db" => true}) do
-    with :ok <- configurable_from_database(conn) do
+    with :ok <- configurable_from_database() do
       configs = Pleroma.Repo.all(ConfigDB)
 
       conn
@@ -914,7 +837,7 @@ defmodule Pleroma.Web.AdminAPI.AdminAPIController do
   end
 
   def config_show(conn, _params) do
-    with :ok <- configurable_from_database(conn) do
+    with :ok <- configurable_from_database() do
       configs = ConfigDB.get_all_as_keyword()
 
       merged =
@@ -953,7 +876,7 @@ defmodule Pleroma.Web.AdminAPI.AdminAPIController do
   end
 
   def config_update(conn, %{"configs" => configs}) do
-    with :ok <- configurable_from_database(conn) do
+    with :ok <- configurable_from_database() do
       {_errors, results} =
         configs
         |> Enum.filter(&whitelisted_config?/1)
@@ -997,7 +920,7 @@ defmodule Pleroma.Web.AdminAPI.AdminAPIController do
   end
 
   def restart(conn, _params) do
-    with :ok <- configurable_from_database(conn) do
+    with :ok <- configurable_from_database() do
       Restarter.Pleroma.restart(Config.get(:env), 50)
 
       json(conn, %{})
@@ -1008,14 +931,11 @@ defmodule Pleroma.Web.AdminAPI.AdminAPIController do
     json(conn, %{need_reboot: Restarter.Pleroma.need_reboot?()})
   end
 
-  defp configurable_from_database(conn) do
+  defp configurable_from_database do
     if Config.get(:configurable_from_database) do
       :ok
     else
-      errors(
-        conn,
-        {:error, "To use this endpoint you need to enable configuration from database."}
-      )
+      {:error, "To use this endpoint you need to enable configuration from database."}
     end
   end
 
@@ -1159,30 +1079,6 @@ defmodule Pleroma.Web.AdminAPI.AdminAPIController do
     |> json(%{"status_visibility" => count})
   end
 
-  defp errors(conn, {:error, :not_found}) do
-    conn
-    |> put_status(:not_found)
-    |> json(dgettext("errors", "Not found"))
-  end
-
-  defp errors(conn, {:error, reason}) do
-    conn
-    |> put_status(:bad_request)
-    |> json(reason)
-  end
-
-  defp errors(conn, {:param_cast, _}) do
-    conn
-    |> put_status(:bad_request)
-    |> json(dgettext("errors", "Invalid parameters"))
-  end
-
-  defp errors(conn, _) do
-    conn
-    |> put_status(:internal_server_error)
-    |> json(dgettext("errors", "Something went wrong"))
-  end
-
   defp page_params(params) do
     {get_page(params["page"]), get_page_size(params["page_size"])}
   end
diff --git a/lib/pleroma/web/admin_api/controllers/fallback_controller.ex b/lib/pleroma/web/admin_api/controllers/fallback_controller.ex
new file mode 100644
index 000000000..82965936d
--- /dev/null
+++ b/lib/pleroma/web/admin_api/controllers/fallback_controller.ex
@@ -0,0 +1,31 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.Web.AdminAPI.FallbackController do
+  use Pleroma.Web, :controller
+
+  def call(conn, {:error, :not_found}) do
+    conn
+    |> put_status(:not_found)
+    |> json(%{error: dgettext("errors", "Not found")})
+  end
+
+  def call(conn, {:error, reason}) do
+    conn
+    |> put_status(:bad_request)
+    |> json(%{error: reason})
+  end
+
+  def call(conn, {:param_cast, _}) do
+    conn
+    |> put_status(:bad_request)
+    |> json(dgettext("errors", "Invalid parameters"))
+  end
+
+  def call(conn, _) do
+    conn
+    |> put_status(:internal_server_error)
+    |> json(%{error: dgettext("errors", "Something went wrong")})
+  end
+end
diff --git a/lib/pleroma/web/admin_api/controllers/status_controller.ex b/lib/pleroma/web/admin_api/controllers/status_controller.ex
new file mode 100644
index 000000000..08cb9c10b
--- /dev/null
+++ b/lib/pleroma/web/admin_api/controllers/status_controller.ex
@@ -0,0 +1,79 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.Web.AdminAPI.StatusController do
+  use Pleroma.Web, :controller
+
+  alias Pleroma.Activity
+  alias Pleroma.ModerationLog
+  alias Pleroma.Plugs.OAuthScopesPlug
+  alias Pleroma.Web.ActivityPub.ActivityPub
+  alias Pleroma.Web.CommonAPI
+  alias Pleroma.Web.MastodonAPI
+
+  require Logger
+
+  plug(Pleroma.Web.ApiSpec.CastAndValidate)
+  plug(OAuthScopesPlug, %{scopes: ["read:statuses"], admin: true} when action in [:index, :show])
+
+  plug(
+    OAuthScopesPlug,
+    %{scopes: ["write:statuses"], admin: true} when action in [:update, :delete]
+  )
+
+  action_fallback(Pleroma.Web.AdminAPI.FallbackController)
+
+  defdelegate open_api_operation(action), to: Pleroma.Web.ApiSpec.Admin.StatusOperation
+
+  def index(%{assigns: %{user: _admin}} = conn, params) do
+    activities =
+      ActivityPub.fetch_statuses(nil, %{
+        "godmode" => params.godmode,
+        "local_only" => params.local_only,
+        "limit" => params.page_size,
+        "offset" => (params.page - 1) * params.page_size,
+        "exclude_reblogs" => not params.with_reblogs
+      })
+
+    render(conn, "index.json", activities: activities, as: :activity)
+  end
+
+  def show(conn, %{id: id}) do
+    with %Activity{} = activity <- Activity.get_by_id(id) do
+      conn
+      |> put_view(MastodonAPI.StatusView)
+      |> render("show.json", %{activity: activity})
+    else
+      nil -> {:error, :not_found}
+    end
+  end
+
+  def update(%{assigns: %{user: admin}, body_params: params} = conn, %{id: id}) do
+    with {:ok, activity} <- CommonAPI.update_activity_scope(id, params) do
+      ModerationLog.insert_log(%{
+        action: "status_update",
+        actor: admin,
+        subject: activity,
+        sensitive: params[:sensitive],
+        visibility: params[:visibility]
+      })
+
+      conn
+      |> put_view(MastodonAPI.StatusView)
+      |> render("show.json", %{activity: activity})
+    end
+  end
+
+  def delete(%{assigns: %{user: user}} = conn, %{id: id}) do
+    with {:ok, %Activity{}} <- CommonAPI.delete(id, user) do
+      ModerationLog.insert_log(%{
+        action: "status_delete",
+        actor: user,
+        subject_id: id
+      })
+
+      json(conn, %{})
+    end
+  end
+end
diff --git a/lib/pleroma/web/api_spec/operations/admin/status_operation.ex b/lib/pleroma/web/api_spec/operations/admin/status_operation.ex
new file mode 100644
index 000000000..0b138dc79
--- /dev/null
+++ b/lib/pleroma/web/api_spec/operations/admin/status_operation.ex
@@ -0,0 +1,165 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.Web.ApiSpec.Admin.StatusOperation do
+  alias OpenApiSpex.Operation
+  alias OpenApiSpex.Schema
+  alias Pleroma.Web.ApiSpec.Schemas.Account
+  alias Pleroma.Web.ApiSpec.Schemas.ApiError
+  alias Pleroma.Web.ApiSpec.Schemas.FlakeID
+  alias Pleroma.Web.ApiSpec.Schemas.Status
+  alias Pleroma.Web.ApiSpec.Schemas.VisibilityScope
+
+  import Pleroma.Web.ApiSpec.Helpers
+  import Pleroma.Web.ApiSpec.StatusOperation, only: [id_param: 0]
+
+  def open_api_operation(action) do
+    operation = String.to_existing_atom("#{action}_operation")
+    apply(__MODULE__, operation, [])
+  end
+
+  def index_operation do
+    %Operation{
+      tags: ["Admin", "Statuses"],
+      operationId: "AdminAPI.StatusController.index",
+      security: [%{"oAuth" => ["read:statuses"]}],
+      parameters: [
+        Operation.parameter(
+          :godmode,
+          :query,
+          %Schema{type: :boolean, default: false},
+          "Allows to see private statuses"
+        ),
+        Operation.parameter(
+          :local_only,
+          :query,
+          %Schema{type: :boolean, default: false},
+          "Excludes remote statuses"
+        ),
+        Operation.parameter(
+          :with_reblogs,
+          :query,
+          %Schema{type: :boolean, default: false},
+          "Allows to see reblogs"
+        ),
+        Operation.parameter(
+          :page,
+          :query,
+          %Schema{type: :integer, default: 1},
+          "Page"
+        ),
+        Operation.parameter(
+          :page_size,
+          :query,
+          %Schema{type: :integer, default: 50},
+          "Number of statuses to return"
+        )
+      ],
+      responses: %{
+        200 =>
+          Operation.response("Array of statuses", "application/json", %Schema{
+            type: :array,
+            items: status()
+          })
+      }
+    }
+  end
+
+  def show_operation do
+    %Operation{
+      tags: ["Admin", "Statuses"],
+      summary: "Show Status",
+      operationId: "AdminAPI.StatusController.show",
+      parameters: [id_param()],
+      security: [%{"oAuth" => ["read:statuses"]}],
+      responses: %{
+        200 => Operation.response("Status", "application/json", Status),
+        404 => Operation.response("Not Found", "application/json", ApiError)
+      }
+    }
+  end
+
+  def update_operation do
+    %Operation{
+      tags: ["Admin", "Statuses"],
+      summary: "Change the scope of an individual reported status",
+      operationId: "AdminAPI.StatusController.update",
+      parameters: [id_param()],
+      security: [%{"oAuth" => ["write:statuses"]}],
+      requestBody: request_body("Parameters", update_request(), required: true),
+      responses: %{
+        200 => Operation.response("Status", "application/json", Status),
+        400 => Operation.response("Error", "application/json", ApiError)
+      }
+    }
+  end
+
+  def delete_operation do
+    %Operation{
+      tags: ["Admin", "Statuses"],
+      summary: "Delete an individual reported status",
+      operationId: "AdminAPI.StatusController.delete",
+      parameters: [id_param()],
+      security: [%{"oAuth" => ["write:statuses"]}],
+      responses: %{
+        200 => empty_object_response(),
+        404 => Operation.response("Not Found", "application/json", ApiError)
+      }
+    }
+  end
+
+  defp status do
+    %Schema{
+      anyOf: [
+        Status,
+        %Schema{
+          type: :object,
+          properties: %{
+            account: %Schema{allOf: [Account, admin_account()]}
+          }
+        }
+      ]
+    }
+  end
+
+  defp admin_account do
+    %Schema{
+      type: :object,
+      properties: %{
+        id: FlakeID,
+        avatar: %Schema{type: :string},
+        nickname: %Schema{type: :string},
+        display_name: %Schema{type: :string},
+        deactivated: %Schema{type: :boolean},
+        local: %Schema{type: :boolean},
+        roles: %Schema{
+          type: :object,
+          properties: %{
+            admin: %Schema{type: :boolean},
+            moderator: %Schema{type: :boolean}
+          }
+        },
+        tags: %Schema{type: :string},
+        confirmation_pending: %Schema{type: :string}
+      }
+    }
+  end
+
+  defp update_request do
+    %Schema{
+      type: :object,
+      properties: %{
+        sensitive: %Schema{
+          type: :boolean,
+          description: "Mark status and attached media as sensitive?"
+        },
+        visibility: VisibilityScope
+      },
+      example: %{
+        "visibility" => "private",
+        "sensitive" => "false"
+      }
+    }
+  end
+end
diff --git a/lib/pleroma/web/api_spec/operations/status_operation.ex b/lib/pleroma/web/api_spec/operations/status_operation.ex
index 0682ca6e5..ca9db01e5 100644
--- a/lib/pleroma/web/api_spec/operations/status_operation.ex
+++ b/lib/pleroma/web/api_spec/operations/status_operation.ex
@@ -487,7 +487,7 @@ defmodule Pleroma.Web.ApiSpec.StatusOperation do
     }
   end
 
-  defp id_param do
+  def id_param do
     Operation.parameter(:id, :path, FlakeID, "Status ID",
       example: "9umDrYheeY451cQnEe",
       required: true
diff --git a/lib/pleroma/web/common_api/utils.ex b/lib/pleroma/web/common_api/utils.ex
index 1c0d90a2b..6ec489f9a 100644
--- a/lib/pleroma/web/common_api/utils.ex
+++ b/lib/pleroma/web/common_api/utils.ex
@@ -470,6 +470,8 @@ defmodule Pleroma.Web.CommonAPI.Utils do
         |> Enum.map(& &1.ap_id)
 
       recipients ++ subscriber_ids
+    else
+      _e -> recipients
     end
   end
 
@@ -481,6 +483,8 @@ defmodule Pleroma.Web.CommonAPI.Utils do
       |> User.get_followers()
       |> Enum.map(& &1.ap_id)
       |> Enum.concat(recipients)
+    else
+      _e -> recipients
     end
   end
 
diff --git a/lib/pleroma/web/ostatus/ostatus_controller.ex b/lib/pleroma/web/ostatus/ostatus_controller.ex
index 6971cd9f8..de1b0b3f0 100644
--- a/lib/pleroma/web/ostatus/ostatus_controller.ex
+++ b/lib/pleroma/web/ostatus/ostatus_controller.ex
@@ -32,13 +32,13 @@ defmodule Pleroma.Web.OStatus.OStatusController do
 
   action_fallback(:errors)
 
-  def object(%{assigns: %{format: format}} = conn, %{"uuid" => _uuid})
+  def object(%{assigns: %{format: format}} = conn, _params)
       when format in ["json", "activity+json"] do
     ActivityPubController.call(conn, :object)
   end
 
-  def object(%{assigns: %{format: format}} = conn, %{"uuid" => uuid}) do
-    with id <- o_status_url(conn, :object, uuid),
+  def object(%{assigns: %{format: format}} = conn, _params) do
+    with id <- Endpoint.url() <> conn.request_path,
          {_, %Activity{} = activity} <-
            {:activity, Activity.get_create_by_object_ap_id_with_object(id)},
          {_, true} <- {:public?, Visibility.is_public?(activity)} do
@@ -54,13 +54,13 @@ defmodule Pleroma.Web.OStatus.OStatusController do
     end
   end
 
-  def activity(%{assigns: %{format: format}} = conn, %{"uuid" => _uuid})
+  def activity(%{assigns: %{format: format}} = conn, _params)
       when format in ["json", "activity+json"] do
     ActivityPubController.call(conn, :activity)
   end
 
-  def activity(%{assigns: %{format: format}} = conn, %{"uuid" => uuid}) do
-    with id <- o_status_url(conn, :activity, uuid),
+  def activity(%{assigns: %{format: format}} = conn, _params) do
+    with id <- Endpoint.url() <> conn.request_path,
          {_, %Activity{} = activity} <- {:activity, Activity.normalize(id)},
          {_, true} <- {:public?, Visibility.is_public?(activity)} do
       case format do
diff --git a/lib/pleroma/web/router.ex b/lib/pleroma/web/router.ex
index cbe320746..e493a4153 100644
--- a/lib/pleroma/web/router.ex
+++ b/lib/pleroma/web/router.ex
@@ -189,10 +189,10 @@ defmodule Pleroma.Web.Router do
     post("/reports/:id/notes", AdminAPIController, :report_notes_create)
     delete("/reports/:report_id/notes/:id", AdminAPIController, :report_notes_delete)
 
-    get("/statuses/:id", AdminAPIController, :status_show)
-    put("/statuses/:id", AdminAPIController, :status_update)
-    delete("/statuses/:id", AdminAPIController, :status_delete)
-    get("/statuses", AdminAPIController, :list_statuses)
+    get("/statuses/:id", StatusController, :show)
+    put("/statuses/:id", StatusController, :update)
+    delete("/statuses/:id", StatusController, :delete)
+    get("/statuses", StatusController, :index)
 
     get("/config", AdminAPIController, :config_show)
     post("/config", AdminAPIController, :config_update)
@@ -556,6 +556,10 @@ defmodule Pleroma.Web.Router do
     get("/notice/:id", OStatus.OStatusController, :notice)
     get("/notice/:id/embed_player", OStatus.OStatusController, :notice_player)
 
+    # Mastodon compatibility routes
+    get("/users/:nickname/statuses/:id", OStatus.OStatusController, :object)
+    get("/users/:nickname/statuses/:id/activity", OStatus.OStatusController, :activity)
+
     get("/users/:nickname/feed", Feed.UserController, :feed, as: :user_feed)
     get("/users/:nickname", Feed.UserController, :feed_redirect, as: :user_feed)
 
diff --git a/test/web/activity_pub/activity_pub_controller_test.exs b/test/web/activity_pub/activity_pub_controller_test.exs
index c432c90e3..dd2a48a61 100644
--- a/test/web/activity_pub/activity_pub_controller_test.exs
+++ b/test/web/activity_pub/activity_pub_controller_test.exs
@@ -6,7 +6,6 @@ defmodule Pleroma.Web.ActivityPub.ActivityPubControllerTest do
   use Pleroma.Web.ConnCase
   use Oban.Testing, repo: Pleroma.Repo
 
-  import Pleroma.Factory
   alias Pleroma.Activity
   alias Pleroma.Config
   alias Pleroma.Delivery
@@ -14,13 +13,19 @@ defmodule Pleroma.Web.ActivityPub.ActivityPubControllerTest do
   alias Pleroma.Object
   alias Pleroma.Tests.ObanHelpers
   alias Pleroma.User
+  alias Pleroma.Web.ActivityPub.ActivityPub
   alias Pleroma.Web.ActivityPub.ObjectView
   alias Pleroma.Web.ActivityPub.Relay
   alias Pleroma.Web.ActivityPub.UserView
   alias Pleroma.Web.ActivityPub.Utils
   alias Pleroma.Web.CommonAPI
+  alias Pleroma.Web.Endpoint
   alias Pleroma.Workers.ReceiverWorker
 
+  import Pleroma.Factory
+
+  require Pleroma.Constants
+
   setup_all do
     Tesla.Mock.mock_global(fn env -> apply(HttpRequestMock, :request, [env]) end)
     :ok
@@ -168,6 +173,60 @@ defmodule Pleroma.Web.ActivityPub.ActivityPubControllerTest do
     end
   end
 
+  describe "mastodon compatibility routes" do
+    test "it returns a json representation of the object with accept application/json", %{
+      conn: conn
+    } do
+      {:ok, object} =
+        %{
+          "type" => "Note",
+          "content" => "hey",
+          "id" => Endpoint.url() <> "/users/raymoo/statuses/999999999",
+          "actor" => Endpoint.url() <> "/users/raymoo",
+          "to" => [Pleroma.Constants.as_public()]
+        }
+        |> Object.create()
+
+      conn =
+        conn
+        |> put_req_header("accept", "application/json")
+        |> get("/users/raymoo/statuses/999999999")
+
+      assert json_response(conn, 200) == ObjectView.render("object.json", %{object: object})
+    end
+
+    test "it returns a json representation of the activity with accept application/json", %{
+      conn: conn
+    } do
+      {:ok, object} =
+        %{
+          "type" => "Note",
+          "content" => "hey",
+          "id" => Endpoint.url() <> "/users/raymoo/statuses/999999999",
+          "actor" => Endpoint.url() <> "/users/raymoo",
+          "to" => [Pleroma.Constants.as_public()]
+        }
+        |> Object.create()
+
+      {:ok, activity, _} =
+        %{
+          "id" => object.data["id"] <> "/activity",
+          "type" => "Create",
+          "object" => object.data["id"],
+          "actor" => object.data["actor"],
+          "to" => object.data["to"]
+        }
+        |> ActivityPub.persist(local: true)
+
+      conn =
+        conn
+        |> put_req_header("accept", "application/json")
+        |> get("/users/raymoo/statuses/999999999/activity")
+
+      assert json_response(conn, 200) == ObjectView.render("object.json", %{object: activity})
+    end
+  end
+
   describe "/objects/:uuid" do
     test "it returns a json representation of the object with accept application/json", %{
       conn: conn
diff --git a/test/web/activity_pub/mrf/steal_emoji_policy_test.exs b/test/web/activity_pub/mrf/steal_emoji_policy_test.exs
index 8882c8c13..3f8222736 100644
--- a/test/web/activity_pub/mrf/steal_emoji_policy_test.exs
+++ b/test/web/activity_pub/mrf/steal_emoji_policy_test.exs
@@ -14,13 +14,17 @@ defmodule Pleroma.Web.ActivityPub.MRF.StealEmojiPolicyTest do
   end
 
   setup do
-    clear_config(:mrf_steal_emoji)
-
     emoji_path = Path.join(Config.get([:instance, :static_dir]), "emoji/stolen")
     File.rm_rf!(emoji_path)
     File.mkdir!(emoji_path)
 
     Pleroma.Emoji.reload()
+
+    on_exit(fn ->
+      File.rm_rf!(emoji_path)
+    end)
+
+    :ok
   end
 
   test "does nothing by default" do
@@ -53,8 +57,8 @@ defmodule Pleroma.Web.ActivityPub.MRF.StealEmojiPolicyTest do
       }
     }
 
-    Config.put([:mrf_steal_emoji, :hosts], ["example.org"])
-    Config.put([:mrf_steal_emoji, :size_limit], 284_468)
+    clear_config([:mrf_steal_emoji, :hosts], ["example.org"])
+    clear_config([:mrf_steal_emoji, :size_limit], 284_468)
 
     assert {:ok, message} == StealEmojiPolicy.filter(message)
 
diff --git a/test/web/admin_api/admin_api_controller_test.exs b/test/web/admin_api/controllers/admin_api_controller_test.exs
similarity index 95%
rename from test/web/admin_api/admin_api_controller_test.exs
rename to test/web/admin_api/controllers/admin_api_controller_test.exs
index 12cb1afd9..321840a8c 100644
--- a/test/web/admin_api/admin_api_controller_test.exs
+++ b/test/web/admin_api/controllers/admin_api_controller_test.exs
@@ -351,7 +351,7 @@ defmodule Pleroma.Web.AdminAPI.AdminAPIControllerTest do
 
       conn = get(conn, "/api/pleroma/admin/users/#{user.nickname}")
 
-      assert "Not found" == json_response(conn, 404)
+      assert %{"error" => "Not found"} == json_response(conn, 404)
     end
   end
 
@@ -684,7 +684,10 @@ defmodule Pleroma.Web.AdminAPI.AdminAPIControllerTest do
       conn = post(conn, "/api/pleroma/admin/users/email_invite?email=foo@bar.com&name=JD")
 
       assert json_response(conn, :bad_request) ==
-               "To send invites you need to set the `invites_enabled` option to true."
+               %{
+                 "error" =>
+                   "To send invites you need to set the `invites_enabled` option to true."
+               }
     end
 
     test "it returns 500 if `registrations_open` is enabled", %{conn: conn} do
@@ -694,7 +697,10 @@ defmodule Pleroma.Web.AdminAPI.AdminAPIControllerTest do
       conn = post(conn, "/api/pleroma/admin/users/email_invite?email=foo@bar.com&name=JD")
 
       assert json_response(conn, :bad_request) ==
-               "To send invites you need to set the `registrations_open` option to false."
+               %{
+                 "error" =>
+                   "To send invites you need to set the `registrations_open` option to false."
+               }
     end
   end
 
@@ -1308,7 +1314,7 @@ defmodule Pleroma.Web.AdminAPI.AdminAPIControllerTest do
         |> put("/api/pleroma/admin/users/disable_mfa", %{nickname: "nickname"})
         |> json_response(404)
 
-      assert response == "Not found"
+      assert response == %{"error" => "Not found"}
     end
   end
 
@@ -1414,7 +1420,7 @@ defmodule Pleroma.Web.AdminAPI.AdminAPIControllerTest do
     test "with invalid token", %{conn: conn} do
       conn = post(conn, "/api/pleroma/admin/users/revoke_invite", %{"token" => "foo"})
 
-      assert json_response(conn, :not_found) == "Not found"
+      assert json_response(conn, :not_found) == %{"error" => "Not found"}
     end
   end
 
@@ -1441,7 +1447,7 @@ defmodule Pleroma.Web.AdminAPI.AdminAPIControllerTest do
     test "returns 404 when report id is invalid", %{conn: conn} do
       conn = get(conn, "/api/pleroma/admin/reports/test")
 
-      assert json_response(conn, :not_found) == "Not found"
+      assert json_response(conn, :not_found) == %{"error" => "Not found"}
     end
   end
 
@@ -1698,115 +1704,6 @@ defmodule Pleroma.Web.AdminAPI.AdminAPIControllerTest do
     end
   end
 
-  describe "GET /api/pleroma/admin/statuses/:id" do
-    test "not found", %{conn: conn} do
-      assert conn
-             |> get("/api/pleroma/admin/statuses/not_found")
-             |> json_response(:not_found)
-    end
-
-    test "shows activity", %{conn: conn} do
-      activity = insert(:note_activity)
-
-      response =
-        conn
-        |> get("/api/pleroma/admin/statuses/#{activity.id}")
-        |> json_response(200)
-
-      assert response["id"] == activity.id
-    end
-  end
-
-  describe "PUT /api/pleroma/admin/statuses/:id" do
-    setup do
-      activity = insert(:note_activity)
-
-      %{id: activity.id}
-    end
-
-    test "toggle sensitive flag", %{conn: conn, id: id, admin: admin} do
-      response =
-        conn
-        |> put("/api/pleroma/admin/statuses/#{id}", %{"sensitive" => "true"})
-        |> json_response(:ok)
-
-      assert response["sensitive"]
-
-      log_entry = Repo.one(ModerationLog)
-
-      assert ModerationLog.get_log_entry_message(log_entry) ==
-               "@#{admin.nickname} updated status ##{id}, set sensitive: 'true'"
-
-      response =
-        conn
-        |> put("/api/pleroma/admin/statuses/#{id}", %{"sensitive" => "false"})
-        |> json_response(:ok)
-
-      refute response["sensitive"]
-    end
-
-    test "change visibility flag", %{conn: conn, id: id, admin: admin} do
-      response =
-        conn
-        |> put("/api/pleroma/admin/statuses/#{id}", %{visibility: "public"})
-        |> json_response(:ok)
-
-      assert response["visibility"] == "public"
-
-      log_entry = Repo.one(ModerationLog)
-
-      assert ModerationLog.get_log_entry_message(log_entry) ==
-               "@#{admin.nickname} updated status ##{id}, set visibility: 'public'"
-
-      response =
-        conn
-        |> put("/api/pleroma/admin/statuses/#{id}", %{visibility: "private"})
-        |> json_response(:ok)
-
-      assert response["visibility"] == "private"
-
-      response =
-        conn
-        |> put("/api/pleroma/admin/statuses/#{id}", %{visibility: "unlisted"})
-        |> json_response(:ok)
-
-      assert response["visibility"] == "unlisted"
-    end
-
-    test "returns 400 when visibility is unknown", %{conn: conn, id: id} do
-      conn = put(conn, "/api/pleroma/admin/statuses/#{id}", %{visibility: "test"})
-
-      assert json_response(conn, :bad_request) == "Unsupported visibility"
-    end
-  end
-
-  describe "DELETE /api/pleroma/admin/statuses/:id" do
-    setup do
-      activity = insert(:note_activity)
-
-      %{id: activity.id}
-    end
-
-    test "deletes status", %{conn: conn, id: id, admin: admin} do
-      conn
-      |> delete("/api/pleroma/admin/statuses/#{id}")
-      |> json_response(:ok)
-
-      refute Activity.get_by_id(id)
-
-      log_entry = Repo.one(ModerationLog)
-
-      assert ModerationLog.get_log_entry_message(log_entry) ==
-               "@#{admin.nickname} deleted status ##{id}"
-    end
-
-    test "returns 404 when the status does not exist", %{conn: conn} do
-      conn = delete(conn, "/api/pleroma/admin/statuses/test")
-
-      assert json_response(conn, :not_found) == "Not found"
-    end
-  end
-
   describe "GET /api/pleroma/admin/config" do
     setup do: clear_config(:configurable_from_database, true)
 
@@ -1815,7 +1712,9 @@ defmodule Pleroma.Web.AdminAPI.AdminAPIControllerTest do
       conn = get(conn, "/api/pleroma/admin/config")
 
       assert json_response(conn, 400) ==
-               "To use this endpoint you need to enable configuration from database."
+               %{
+                 "error" => "To use this endpoint you need to enable configuration from database."
+               }
     end
 
     test "with settings only in db", %{conn: conn} do
@@ -1937,7 +1836,7 @@ defmodule Pleroma.Web.AdminAPI.AdminAPIControllerTest do
     conn = post(conn, "/api/pleroma/admin/config", %{"configs" => []})
 
     assert json_response(conn, 400) ==
-             "To use this endpoint you need to enable configuration from database."
+             %{"error" => "To use this endpoint you need to enable configuration from database."}
   end
 
   describe "POST /api/pleroma/admin/config" do
@@ -3000,54 +2899,6 @@ defmodule Pleroma.Web.AdminAPI.AdminAPIControllerTest do
     on_exit(fn -> Restarter.Pleroma.refresh() end)
   end
 
-  describe "GET /api/pleroma/admin/statuses" do
-    test "returns all public and unlisted statuses", %{conn: conn, admin: admin} do
-      blocked = insert(:user)
-      user = insert(:user)
-      User.block(admin, blocked)
-
-      {:ok, _} = CommonAPI.post(user, %{status: "@#{admin.nickname}", visibility: "direct"})
-
-      {:ok, _} = CommonAPI.post(user, %{status: ".", visibility: "unlisted"})
-      {:ok, _} = CommonAPI.post(user, %{status: ".", visibility: "private"})
-      {:ok, _} = CommonAPI.post(user, %{status: ".", visibility: "public"})
-      {:ok, _} = CommonAPI.post(blocked, %{status: ".", visibility: "public"})
-
-      response =
-        conn
-        |> get("/api/pleroma/admin/statuses")
-        |> json_response(200)
-
-      refute "private" in Enum.map(response, & &1["visibility"])
-      assert length(response) == 3
-    end
-
-    test "returns only local statuses with local_only on", %{conn: conn} do
-      user = insert(:user)
-      remote_user = insert(:user, local: false, nickname: "archaeme@archae.me")
-      insert(:note_activity, user: user, local: true)
-      insert(:note_activity, user: remote_user, local: false)
-
-      response =
-        conn
-        |> get("/api/pleroma/admin/statuses?local_only=true")
-        |> json_response(200)
-
-      assert length(response) == 1
-    end
-
-    test "returns private and direct statuses with godmode on", %{conn: conn, admin: admin} do
-      user = insert(:user)
-
-      {:ok, _} = CommonAPI.post(user, %{status: "@#{admin.nickname}", visibility: "direct"})
-
-      {:ok, _} = CommonAPI.post(user, %{status: ".", visibility: "private"})
-      {:ok, _} = CommonAPI.post(user, %{status: ".", visibility: "public"})
-      conn = get(conn, "/api/pleroma/admin/statuses?godmode=true")
-      assert json_response(conn, 200) |> length() == 3
-    end
-  end
-
   describe "GET /api/pleroma/admin/users/:nickname/statuses" do
     setup do
       user = insert(:user)
diff --git a/test/web/admin_api/controllers/status_controller_test.exs b/test/web/admin_api/controllers/status_controller_test.exs
new file mode 100644
index 000000000..124d8dc2e
--- /dev/null
+++ b/test/web/admin_api/controllers/status_controller_test.exs
@@ -0,0 +1,194 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.Web.AdminAPI.StatusControllerTest do
+  use Pleroma.Web.ConnCase
+
+  import Pleroma.Factory
+
+  alias Pleroma.Activity
+  alias Pleroma.Config
+  alias Pleroma.ModerationLog
+  alias Pleroma.Repo
+  alias Pleroma.User
+  alias Pleroma.Web.CommonAPI
+
+  setup do
+    admin = insert(:user, is_admin: true)
+    token = insert(:oauth_admin_token, user: admin)
+
+    conn =
+      build_conn()
+      |> assign(:user, admin)
+      |> assign(:token, token)
+
+    {:ok, %{admin: admin, token: token, conn: conn}}
+  end
+
+  describe "GET /api/pleroma/admin/statuses/:id" do
+    test "not found", %{conn: conn} do
+      assert conn
+             |> get("/api/pleroma/admin/statuses/not_found")
+             |> json_response_and_validate_schema(:not_found)
+    end
+
+    test "shows activity", %{conn: conn} do
+      activity = insert(:note_activity)
+
+      response =
+        conn
+        |> get("/api/pleroma/admin/statuses/#{activity.id}")
+        |> json_response_and_validate_schema(200)
+
+      assert response["id"] == activity.id
+    end
+  end
+
+  describe "PUT /api/pleroma/admin/statuses/:id" do
+    setup do
+      activity = insert(:note_activity)
+
+      %{id: activity.id}
+    end
+
+    test "toggle sensitive flag", %{conn: conn, id: id, admin: admin} do
+      response =
+        conn
+        |> put_req_header("content-type", "application/json")
+        |> put("/api/pleroma/admin/statuses/#{id}", %{"sensitive" => "true"})
+        |> json_response_and_validate_schema(:ok)
+
+      assert response["sensitive"]
+
+      log_entry = Repo.one(ModerationLog)
+
+      assert ModerationLog.get_log_entry_message(log_entry) ==
+               "@#{admin.nickname} updated status ##{id}, set sensitive: 'true'"
+
+      response =
+        conn
+        |> put_req_header("content-type", "application/json")
+        |> put("/api/pleroma/admin/statuses/#{id}", %{"sensitive" => "false"})
+        |> json_response_and_validate_schema(:ok)
+
+      refute response["sensitive"]
+    end
+
+    test "change visibility flag", %{conn: conn, id: id, admin: admin} do
+      response =
+        conn
+        |> put_req_header("content-type", "application/json")
+        |> put("/api/pleroma/admin/statuses/#{id}", %{visibility: "public"})
+        |> json_response_and_validate_schema(:ok)
+
+      assert response["visibility"] == "public"
+
+      log_entry = Repo.one(ModerationLog)
+
+      assert ModerationLog.get_log_entry_message(log_entry) ==
+               "@#{admin.nickname} updated status ##{id}, set visibility: 'public'"
+
+      response =
+        conn
+        |> put_req_header("content-type", "application/json")
+        |> put("/api/pleroma/admin/statuses/#{id}", %{visibility: "private"})
+        |> json_response_and_validate_schema(:ok)
+
+      assert response["visibility"] == "private"
+
+      response =
+        conn
+        |> put_req_header("content-type", "application/json")
+        |> put("/api/pleroma/admin/statuses/#{id}", %{visibility: "unlisted"})
+        |> json_response_and_validate_schema(:ok)
+
+      assert response["visibility"] == "unlisted"
+    end
+
+    test "returns 400 when visibility is unknown", %{conn: conn, id: id} do
+      conn =
+        conn
+        |> put_req_header("content-type", "application/json")
+        |> put("/api/pleroma/admin/statuses/#{id}", %{visibility: "test"})
+
+      assert %{"error" => "test - Invalid value for enum."} =
+               json_response_and_validate_schema(conn, :bad_request)
+    end
+  end
+
+  describe "DELETE /api/pleroma/admin/statuses/:id" do
+    setup do
+      activity = insert(:note_activity)
+
+      %{id: activity.id}
+    end
+
+    test "deletes status", %{conn: conn, id: id, admin: admin} do
+      conn
+      |> delete("/api/pleroma/admin/statuses/#{id}")
+      |> json_response_and_validate_schema(:ok)
+
+      refute Activity.get_by_id(id)
+
+      log_entry = Repo.one(ModerationLog)
+
+      assert ModerationLog.get_log_entry_message(log_entry) ==
+               "@#{admin.nickname} deleted status ##{id}"
+    end
+
+    test "returns 404 when the status does not exist", %{conn: conn} do
+      conn = delete(conn, "/api/pleroma/admin/statuses/test")
+
+      assert json_response_and_validate_schema(conn, :not_found) == %{"error" => "Not found"}
+    end
+  end
+
+  describe "GET /api/pleroma/admin/statuses" do
+    test "returns all public and unlisted statuses", %{conn: conn, admin: admin} do
+      blocked = insert(:user)
+      user = insert(:user)
+      User.block(admin, blocked)
+
+      {:ok, _} = CommonAPI.post(user, %{status: "@#{admin.nickname}", visibility: "direct"})
+
+      {:ok, _} = CommonAPI.post(user, %{status: ".", visibility: "unlisted"})
+      {:ok, _} = CommonAPI.post(user, %{status: ".", visibility: "private"})
+      {:ok, _} = CommonAPI.post(user, %{status: ".", visibility: "public"})
+      {:ok, _} = CommonAPI.post(blocked, %{status: ".", visibility: "public"})
+
+      response =
+        conn
+        |> get("/api/pleroma/admin/statuses")
+        |> json_response_and_validate_schema(200)
+
+      refute "private" in Enum.map(response, & &1["visibility"])
+      assert length(response) == 3
+    end
+
+    test "returns only local statuses with local_only on", %{conn: conn} do
+      user = insert(:user)
+      remote_user = insert(:user, local: false, nickname: "archaeme@archae.me")
+      insert(:note_activity, user: user, local: true)
+      insert(:note_activity, user: remote_user, local: false)
+
+      response =
+        conn
+        |> get("/api/pleroma/admin/statuses?local_only=true")
+        |> json_response_and_validate_schema(200)
+
+      assert length(response) == 1
+    end
+
+    test "returns private and direct statuses with godmode on", %{conn: conn, admin: admin} do
+      user = insert(:user)
+
+      {:ok, _} = CommonAPI.post(user, %{status: "@#{admin.nickname}", visibility: "direct"})
+
+      {:ok, _} = CommonAPI.post(user, %{status: ".", visibility: "private"})
+      {:ok, _} = CommonAPI.post(user, %{status: ".", visibility: "public"})
+      conn = get(conn, "/api/pleroma/admin/statuses?godmode=true")
+      assert json_response_and_validate_schema(conn, 200) |> length() == 3
+    end
+  end
+end
diff --git a/test/web/ostatus/ostatus_controller_test.exs b/test/web/ostatus/ostatus_controller_test.exs
index bb349cb19..ee498f4b5 100644
--- a/test/web/ostatus/ostatus_controller_test.exs
+++ b/test/web/ostatus/ostatus_controller_test.exs
@@ -10,7 +10,11 @@ defmodule Pleroma.Web.OStatus.OStatusControllerTest do
   alias Pleroma.Config
   alias Pleroma.Object
   alias Pleroma.User
+  alias Pleroma.Web.ActivityPub.ActivityPub
   alias Pleroma.Web.CommonAPI
+  alias Pleroma.Web.Endpoint
+
+  require Pleroma.Constants
 
   setup_all do
     Tesla.Mock.mock_global(fn env -> apply(HttpRequestMock, :request, [env]) end)
@@ -19,6 +23,47 @@ defmodule Pleroma.Web.OStatus.OStatusControllerTest do
 
   setup do: clear_config([:instance, :federating], true)
 
+  describe "Mastodon compatibility routes" do
+    setup %{conn: conn} do
+      conn = put_req_header(conn, "accept", "text/html")
+
+      {:ok, object} =
+        %{
+          "type" => "Note",
+          "content" => "hey",
+          "id" => Endpoint.url() <> "/users/raymoo/statuses/999999999",
+          "actor" => Endpoint.url() <> "/users/raymoo",
+          "to" => [Pleroma.Constants.as_public()]
+        }
+        |> Object.create()
+
+      {:ok, activity, _} =
+        %{
+          "id" => object.data["id"] <> "/activity",
+          "type" => "Create",
+          "object" => object.data["id"],
+          "actor" => object.data["actor"],
+          "to" => object.data["to"]
+        }
+        |> ActivityPub.persist(local: true)
+
+      %{conn: conn, activity: activity}
+    end
+
+    test "redirects to /notice/:id for html format", %{conn: conn, activity: activity} do
+      conn = get(conn, "/users/raymoo/statuses/999999999")
+      assert redirected_to(conn) == "/notice/#{activity.id}"
+    end
+
+    test "redirects to /notice/:id for html format for activity", %{
+      conn: conn,
+      activity: activity
+    } do
+      conn = get(conn, "/users/raymoo/statuses/999999999/activity")
+      assert redirected_to(conn) == "/notice/#{activity.id}"
+    end
+  end
+
   # Note: see ActivityPubControllerTest for JSON format tests
   describe "GET /objects/:uuid (text/html)" do
     setup %{conn: conn} do