diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9805e30df..2d969e504 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -19,6 +19,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
   <summary>API Changes</summary>
 - Mastodon API: Support for `include_types` in `/api/v1/notifications`.
 - Mastodon API: Added `/api/v1/notifications/:id/dismiss` endpoint.
+- Mastodon API: Add support for filtering replies in public and home timelines
 - Admin API: endpoints for create/update/delete OAuth Apps.
 </details>
 
diff --git a/benchmarks/load_testing/activities.ex b/benchmarks/load_testing/activities.ex
index 23ee2b987..482e42fc1 100644
--- a/benchmarks/load_testing/activities.ex
+++ b/benchmarks/load_testing/activities.ex
@@ -279,7 +279,7 @@ defmodule Pleroma.LoadTesting.Activities do
     actor = get_actor(group, user, friends, non_friends)
 
     with activity_id when not is_nil(activity_id) <- get_random_create_activity_id(),
-         {:ok, _activity, _object} <- CommonAPI.favorite(activity_id, actor) do
+         {:ok, _activity} <- CommonAPI.favorite(actor, activity_id) do
       :ok
     else
       {:error, _} ->
@@ -313,7 +313,7 @@ defmodule Pleroma.LoadTesting.Activities do
     tasks = get_reply_tasks(visibility, group)
 
     {:ok, activity} =
-      CommonAPI.post(user, %{"status" => "Simple status", "visibility" => "unlisted"})
+      CommonAPI.post(user, %{"status" => "Simple status", "visibility" => visibility})
 
     acc = {activity.id, ["@" <> actor.nickname, "reply to status"]}
     insert_replies(tasks, visibility, user, friends, non_friends, acc)
diff --git a/benchmarks/load_testing/fetcher.ex b/benchmarks/load_testing/fetcher.ex
index 786929ace..12c30f6f5 100644
--- a/benchmarks/load_testing/fetcher.ex
+++ b/benchmarks/load_testing/fetcher.ex
@@ -41,6 +41,7 @@ defmodule Pleroma.LoadTesting.Fetcher do
     fetch_notifications(user)
     fetch_favourites(user)
     fetch_long_thread(user)
+    fetch_timelines_with_reply_filtering(user)
   end
 
   defp render_views(user) do
@@ -495,4 +496,58 @@ defmodule Pleroma.LoadTesting.Fetcher do
       formatters: formatters()
     )
   end
+
+  defp fetch_timelines_with_reply_filtering(user) do
+    public_params = opts_for_public_timeline(user)
+
+    Benchee.run(
+      %{
+        "Public timeline without reply filtering" => fn ->
+          ActivityPub.fetch_public_activities(public_params)
+        end,
+        "Public timeline with reply filtering - following" => fn ->
+          public_params
+          |> Map.put("reply_visibility", "following")
+          |> Map.put("reply_filtering_user", user)
+          |> ActivityPub.fetch_public_activities()
+        end,
+        "Public timeline with reply filtering - self" => fn ->
+          public_params
+          |> Map.put("reply_visibility", "self")
+          |> Map.put("reply_filtering_user", user)
+          |> ActivityPub.fetch_public_activities()
+        end
+      },
+      formatters: formatters()
+    )
+
+    private_params = opts_for_home_timeline(user)
+
+    recipients = [user.ap_id | User.following(user)]
+
+    Benchee.run(
+      %{
+        "Home timeline without reply filtering" => fn ->
+          ActivityPub.fetch_activities(recipients, private_params)
+        end,
+        "Home timeline with reply filtering - following" => fn ->
+          private_params =
+            private_params
+            |> Map.put("reply_filtering_user", user)
+            |> Map.put("reply_visibility", "following")
+
+          ActivityPub.fetch_activities(recipients, private_params)
+        end,
+        "Home timeline with reply filtering - self" => fn ->
+          private_params =
+            private_params
+            |> Map.put("reply_filtering_user", user)
+            |> Map.put("reply_visibility", "self")
+
+          ActivityPub.fetch_activities(recipients, private_params)
+        end
+      },
+      formatters: formatters()
+    )
+  end
 end
diff --git a/benchmarks/mix/tasks/pleroma/load_testing.ex b/benchmarks/mix/tasks/pleroma/load_testing.ex
index 72b225f09..388883240 100644
--- a/benchmarks/mix/tasks/pleroma/load_testing.ex
+++ b/benchmarks/mix/tasks/pleroma/load_testing.ex
@@ -44,6 +44,7 @@ defmodule Mix.Tasks.Pleroma.LoadTesting do
   ]
 
   def run(args) do
+    Logger.configure(level: :error)
     Mix.Pleroma.start_pleroma()
     clean_tables()
     {opts, _} = OptionParser.parse!(args, strict: @switches, aliases: @aliases)
diff --git a/docs/API/differences_in_mastoapi_responses.md b/docs/API/differences_in_mastoapi_responses.md
index 1059155cf..41ceda26b 100644
--- a/docs/API/differences_in_mastoapi_responses.md
+++ b/docs/API/differences_in_mastoapi_responses.md
@@ -14,6 +14,7 @@ Some apps operate under the assumption that no more than 4 attachments can be re
 
 Adding the parameter `with_muted=true` to the timeline queries will also return activities by muted (not by blocked!) users.
 Adding the parameter `exclude_visibilities` to the timeline queries will exclude the statuses with the given visibilities. The parameter accepts an array of visibility types (`public`, `unlisted`, `private`, `direct`), e.g., `exclude_visibilities[]=direct&exclude_visibilities[]=private`.
+Adding the parameter `reply_visibility` to the public and home timelines queries will filter replies. Possible values: without parameter (default) shows all replies, `following` - replies directed to you or users you follow, `self` - replies directed to you.
 
 ## Statuses
 
diff --git a/docs/configuration/hardening.md b/docs/configuration/hardening.md
index b54c28850..d3bfc4e4a 100644
--- a/docs/configuration/hardening.md
+++ b/docs/configuration/hardening.md
@@ -36,7 +36,7 @@ content-security-policy:
   default-src 'none';
   base-uri 'self';
   frame-ancestors 'none';
-  img-src 'self' data: https:;
+  img-src 'self' data: blob: https:;
   media-src 'self' https:;
   style-src 'self' 'unsafe-inline';
   font-src 'self';
diff --git a/lib/pleroma/plugs/http_security_plug.ex b/lib/pleroma/plugs/http_security_plug.ex
index 81e6b4f2a..6462797b6 100644
--- a/lib/pleroma/plugs/http_security_plug.ex
+++ b/lib/pleroma/plugs/http_security_plug.ex
@@ -75,7 +75,7 @@ defmodule Pleroma.Plugs.HTTPSecurityPlug do
       "default-src 'none'",
       "base-uri 'self'",
       "frame-ancestors 'none'",
-      "img-src 'self' data: https:",
+      "img-src 'self' data: blob: https:",
       "media-src 'self' https:",
       "style-src 'self' 'unsafe-inline'",
       "font-src 'self'",
diff --git a/lib/pleroma/user.ex b/lib/pleroma/user.ex
index 477237756..b451202b2 100644
--- a/lib/pleroma/user.ex
+++ b/lib/pleroma/user.ex
@@ -832,6 +832,7 @@ defmodule Pleroma.User do
   def set_cache(%User{} = user) do
     Cachex.put(:user_cache, "ap_id:#{user.ap_id}", user)
     Cachex.put(:user_cache, "nickname:#{user.nickname}", user)
+    Cachex.put(:user_cache, "friends_ap_ids:#{user.nickname}", get_user_friends_ap_ids(user))
     {:ok, user}
   end
 
@@ -847,9 +848,22 @@ defmodule Pleroma.User do
     end
   end
 
+  def get_user_friends_ap_ids(user) do
+    from(u in User.get_friends_query(user), select: u.ap_id)
+    |> Repo.all()
+  end
+
+  @spec get_cached_user_friends_ap_ids(User.t()) :: [String.t()]
+  def get_cached_user_friends_ap_ids(user) do
+    Cachex.fetch!(:user_cache, "friends_ap_ids:#{user.ap_id}", fn _ ->
+      get_user_friends_ap_ids(user)
+    end)
+  end
+
   def invalidate_cache(user) do
     Cachex.del(:user_cache, "ap_id:#{user.ap_id}")
     Cachex.del(:user_cache, "nickname:#{user.nickname}")
+    Cachex.del(:user_cache, "friends_ap_ids:#{user.ap_id}")
   end
 
   @spec get_cached_by_ap_id(String.t()) :: User.t() | nil
diff --git a/lib/pleroma/user/query.ex b/lib/pleroma/user/query.ex
index ec88088cf..ac77aab71 100644
--- a/lib/pleroma/user/query.ex
+++ b/lib/pleroma/user/query.ex
@@ -54,13 +54,13 @@ defmodule Pleroma.User.Query do
             select: term(),
             limit: pos_integer()
           }
-          | %{}
+          | map()
 
   @ilike_criteria [:nickname, :name, :query]
   @equal_criteria [:email]
   @contains_criteria [:ap_id, :nickname]
 
-  @spec build(criteria()) :: Query.t()
+  @spec build(Query.t(), criteria()) :: Query.t()
   def build(query \\ base_query(), criteria) do
     prepare_query(query, criteria)
   end
diff --git a/lib/pleroma/web/activity_pub/activity_pub.ex b/lib/pleroma/web/activity_pub/activity_pub.ex
index 6ee061287..c3465e3a6 100644
--- a/lib/pleroma/web/activity_pub/activity_pub.ex
+++ b/lib/pleroma/web/activity_pub/activity_pub.ex
@@ -449,6 +449,7 @@ defmodule Pleroma.Web.ActivityPub.ActivityPub do
 
   defp do_announce(user, object, activity_id, local, public) do
     with true <- is_announceable?(object, user, public),
+         object <- Object.get_by_id(object.id),
          announce_data <- make_announce_data(user, object, activity_id, public),
          {:ok, activity} <- insert(announce_data, local),
          {:ok, object} <- add_announce_to_object(activity, object),
@@ -1058,6 +1059,41 @@ defmodule Pleroma.Web.ActivityPub.ActivityPub do
     )
   end
 
+  defp restrict_replies(query, %{
+         "reply_filtering_user" => user,
+         "reply_visibility" => "self"
+       }) do
+    from(
+      [activity, object] in query,
+      where:
+        fragment(
+          "?->>'inReplyTo' is null OR ? = ANY(?)",
+          object.data,
+          ^user.ap_id,
+          activity.recipients
+        )
+    )
+  end
+
+  defp restrict_replies(query, %{
+         "reply_filtering_user" => user,
+         "reply_visibility" => "following"
+       }) do
+    from(
+      [activity, object] in query,
+      where:
+        fragment(
+          "?->>'inReplyTo' is null OR ? && array_remove(?, ?) OR ? = ?",
+          object.data,
+          ^[user.ap_id | User.get_cached_user_friends_ap_ids(user)],
+          activity.recipients,
+          activity.actor,
+          activity.actor,
+          ^user.ap_id
+        )
+    )
+  end
+
   defp restrict_replies(query, _), do: query
 
   defp restrict_reblogs(query, %{"exclude_reblogs" => val}) when val == "true" or val == "1" do
@@ -1272,6 +1308,7 @@ defmodule Pleroma.Web.ActivityPub.ActivityPub do
     |> maybe_set_thread_muted_field(opts)
     |> maybe_order(opts)
     |> restrict_recipients(recipients, opts["user"])
+    |> restrict_replies(opts)
     |> restrict_tag(opts)
     |> restrict_tag_reject(opts)
     |> restrict_tag_all(opts)
@@ -1286,7 +1323,6 @@ defmodule Pleroma.Web.ActivityPub.ActivityPub do
     |> restrict_media(opts)
     |> restrict_visibility(opts)
     |> restrict_thread_visibility(opts, config)
-    |> restrict_replies(opts)
     |> restrict_reblogs(opts)
     |> restrict_pinned(opts)
     |> restrict_muted_reblogs(restrict_muted_reblogs_opts)
diff --git a/lib/pleroma/web/admin_api/views/status_view.ex b/lib/pleroma/web/admin_api/views/status_view.ex
index 360ddc22c..3637dee24 100644
--- a/lib/pleroma/web/admin_api/views/status_view.ex
+++ b/lib/pleroma/web/admin_api/views/status_view.ex
@@ -8,15 +8,16 @@ defmodule Pleroma.Web.AdminAPI.StatusView do
   require Pleroma.Constants
 
   alias Pleroma.User
+  alias Pleroma.Web.MastodonAPI.StatusView
 
   def render("index.json", opts) do
     safe_render_many(opts.activities, __MODULE__, "show.json", opts)
   end
 
   def render("show.json", %{activity: %{data: %{"object" => _object}} = activity} = opts) do
-    user = get_user(activity.data["actor"])
+    user = StatusView.get_user(activity.data["actor"])
 
-    Pleroma.Web.MastodonAPI.StatusView.render("show.json", opts)
+    StatusView.render("show.json", opts)
     |> Map.merge(%{account: merge_account_views(user)})
   end
 
@@ -26,17 +27,4 @@ defmodule Pleroma.Web.AdminAPI.StatusView do
   end
 
   defp merge_account_views(_), do: %{}
-
-  defp get_user(ap_id) do
-    cond do
-      user = User.get_cached_by_ap_id(ap_id) ->
-        user
-
-      user = User.get_by_guessed_nickname(ap_id) ->
-        user
-
-      true ->
-        User.error_user(ap_id)
-    end
-  end
 end
diff --git a/lib/pleroma/web/api_spec/operations/app_operation.ex b/lib/pleroma/web/api_spec/operations/app_operation.ex
index 26d8dbd42..035ef2470 100644
--- a/lib/pleroma/web/api_spec/operations/app_operation.ex
+++ b/lib/pleroma/web/api_spec/operations/app_operation.ex
@@ -6,8 +6,6 @@ defmodule Pleroma.Web.ApiSpec.AppOperation do
   alias OpenApiSpex.Operation
   alias OpenApiSpex.Schema
   alias Pleroma.Web.ApiSpec.Helpers
-  alias Pleroma.Web.ApiSpec.Schemas.AppCreateRequest
-  alias Pleroma.Web.ApiSpec.Schemas.AppCreateResponse
 
   @spec open_api_operation(atom) :: Operation.t()
   def open_api_operation(action) do
@@ -22,9 +20,9 @@ defmodule Pleroma.Web.ApiSpec.AppOperation do
       summary: "Create an application",
       description: "Create a new application to obtain OAuth2 credentials",
       operationId: "AppController.create",
-      requestBody: Helpers.request_body("Parameters", AppCreateRequest, required: true),
+      requestBody: Helpers.request_body("Parameters", create_request(), required: true),
       responses: %{
-        200 => Operation.response("App", "application/json", AppCreateResponse),
+        200 => Operation.response("App", "application/json", create_response()),
         422 =>
           Operation.response(
             "Unprocessable Entity",
@@ -93,4 +91,58 @@ defmodule Pleroma.Web.ApiSpec.AppOperation do
       }
     }
   end
+
+  defp create_request do
+    %Schema{
+      title: "AppCreateRequest",
+      description: "POST body for creating an app",
+      type: :object,
+      properties: %{
+        client_name: %Schema{type: :string, description: "A name for your application."},
+        redirect_uris: %Schema{
+          type: :string,
+          description:
+            "Where the user should be redirected after authorization. To display the authorization code to the user instead of redirecting to a web page, use `urn:ietf:wg:oauth:2.0:oob` in this parameter."
+        },
+        scopes: %Schema{
+          type: :string,
+          description: "Space separated list of scopes",
+          default: "read"
+        },
+        website: %Schema{type: :string, description: "A URL to the homepage of your app"}
+      },
+      required: [:client_name, :redirect_uris],
+      example: %{
+        "client_name" => "My App",
+        "redirect_uris" => "https://myapp.com/auth/callback",
+        "website" => "https://myapp.com/"
+      }
+    }
+  end
+
+  defp create_response do
+    %Schema{
+      title: "AppCreateResponse",
+      description: "Response schema for an app",
+      type: :object,
+      properties: %{
+        id: %Schema{type: :string},
+        name: %Schema{type: :string},
+        client_id: %Schema{type: :string},
+        client_secret: %Schema{type: :string},
+        redirect_uri: %Schema{type: :string},
+        vapid_key: %Schema{type: :string},
+        website: %Schema{type: :string, nullable: true}
+      },
+      example: %{
+        "id" => "123",
+        "name" => "My App",
+        "client_id" => "TWhM-tNSuncnqN7DBJmoyeLnk6K3iJJ71KKXxgL1hPM",
+        "client_secret" => "ZEaFUFmF0umgBX1qKJDjaU99Q31lDkOU8NutzTOoliw",
+        "vapid_key" =>
+          "BCk-QqERU0q-CfYZjcuB6lnyyOYfJ2AifKqfeGIm7Z-HiTU5T9eTG5GxVA0_OH5mMlI4UkkDTpaZwozy0TzdZ2M=",
+        "website" => "https://myapp.com/"
+      }
+    }
+  end
 end
diff --git a/lib/pleroma/web/api_spec/operations/custom_emoji_operation.ex b/lib/pleroma/web/api_spec/operations/custom_emoji_operation.ex
index cf2215823..a117fe460 100644
--- a/lib/pleroma/web/api_spec/operations/custom_emoji_operation.ex
+++ b/lib/pleroma/web/api_spec/operations/custom_emoji_operation.ex
@@ -4,7 +4,8 @@
 
 defmodule Pleroma.Web.ApiSpec.CustomEmojiOperation do
   alias OpenApiSpex.Operation
-  alias Pleroma.Web.ApiSpec.Schemas.CustomEmojisResponse
+  alias OpenApiSpex.Schema
+  alias Pleroma.Web.ApiSpec.Schemas.CustomEmoji
 
   def open_api_operation(action) do
     operation = String.to_existing_atom("#{action}_operation")
@@ -18,8 +19,43 @@ defmodule Pleroma.Web.ApiSpec.CustomEmojiOperation do
       description: "Returns custom emojis that are available on the server.",
       operationId: "CustomEmojiController.index",
       responses: %{
-        200 => Operation.response("Custom Emojis", "application/json", CustomEmojisResponse)
+        200 => Operation.response("Custom Emojis", "application/json", custom_emojis_resposnse())
       }
     }
   end
+
+  defp custom_emojis_resposnse do
+    %Schema{
+      title: "CustomEmojisResponse",
+      description: "Response schema for custom emojis",
+      type: :array,
+      items: CustomEmoji,
+      example: [
+        %{
+          "category" => "Fun",
+          "shortcode" => "blank",
+          "static_url" => "https://lain.com/emoji/blank.png",
+          "tags" => ["Fun"],
+          "url" => "https://lain.com/emoji/blank.png",
+          "visible_in_picker" => false
+        },
+        %{
+          "category" => "Gif,Fun",
+          "shortcode" => "firefox",
+          "static_url" => "https://lain.com/emoji/Firefox.gif",
+          "tags" => ["Gif", "Fun"],
+          "url" => "https://lain.com/emoji/Firefox.gif",
+          "visible_in_picker" => true
+        },
+        %{
+          "category" => "pack:mixed",
+          "shortcode" => "sadcat",
+          "static_url" => "https://lain.com/emoji/mixed/sadcat.png",
+          "tags" => ["pack:mixed"],
+          "url" => "https://lain.com/emoji/mixed/sadcat.png",
+          "visible_in_picker" => true
+        }
+      ]
+    }
+  end
 end
diff --git a/lib/pleroma/web/api_spec/operations/domain_block_operation.ex b/lib/pleroma/web/api_spec/operations/domain_block_operation.ex
index dd14837c3..3b7f51ceb 100644
--- a/lib/pleroma/web/api_spec/operations/domain_block_operation.ex
+++ b/lib/pleroma/web/api_spec/operations/domain_block_operation.ex
@@ -6,8 +6,6 @@ defmodule Pleroma.Web.ApiSpec.DomainBlockOperation do
   alias OpenApiSpex.Operation
   alias OpenApiSpex.Schema
   alias Pleroma.Web.ApiSpec.Helpers
-  alias Pleroma.Web.ApiSpec.Schemas.DomainBlockRequest
-  alias Pleroma.Web.ApiSpec.Schemas.DomainBlocksResponse
 
   def open_api_operation(action) do
     operation = String.to_existing_atom("#{action}_operation")
@@ -22,7 +20,13 @@ defmodule Pleroma.Web.ApiSpec.DomainBlockOperation do
       security: [%{"oAuth" => ["follow", "read:blocks"]}],
       operationId: "DomainBlockController.index",
       responses: %{
-        200 => Operation.response("Domain blocks", "application/json", DomainBlocksResponse)
+        200 =>
+          Operation.response("Domain blocks", "application/json", %Schema{
+            description: "Response schema for domain blocks",
+            type: :array,
+            items: %Schema{type: :string},
+            example: ["google.com", "facebook.com"]
+          })
       }
     }
   end
@@ -40,7 +44,7 @@ defmodule Pleroma.Web.ApiSpec.DomainBlockOperation do
       - prevent following new users from it (but does not remove existing follows)
       """,
       operationId: "DomainBlockController.create",
-      requestBody: Helpers.request_body("Parameters", DomainBlockRequest, required: true),
+      requestBody: domain_block_request(),
       security: [%{"oAuth" => ["follow", "write:blocks"]}],
       responses: %{
         200 => Operation.response("Empty object", "application/json", %Schema{type: :object})
@@ -54,11 +58,28 @@ defmodule Pleroma.Web.ApiSpec.DomainBlockOperation do
       summary: "Unblock a domain",
       description: "Remove a domain block, if it exists in the user's array of blocked domains.",
       operationId: "DomainBlockController.delete",
-      requestBody: Helpers.request_body("Parameters", DomainBlockRequest, required: true),
+      requestBody: domain_block_request(),
       security: [%{"oAuth" => ["follow", "write:blocks"]}],
       responses: %{
         200 => Operation.response("Empty object", "application/json", %Schema{type: :object})
       }
     }
   end
+
+  defp domain_block_request do
+    Helpers.request_body(
+      "Parameters",
+      %Schema{
+        type: :object,
+        properties: %{
+          domain: %Schema{type: :string}
+        },
+        required: [:domain]
+      },
+      required: true,
+      example: %{
+        "domain" => "facebook.com"
+      }
+    )
+  end
 end
diff --git a/lib/pleroma/web/api_spec/schemas/app_create_request.ex b/lib/pleroma/web/api_spec/schemas/app_create_request.ex
deleted file mode 100644
index 8a83abef3..000000000
--- a/lib/pleroma/web/api_spec/schemas/app_create_request.ex
+++ /dev/null
@@ -1,33 +0,0 @@
-# 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.Schemas.AppCreateRequest do
-  alias OpenApiSpex.Schema
-  require OpenApiSpex
-
-  OpenApiSpex.schema(%{
-    title: "AppCreateRequest",
-    description: "POST body for creating an app",
-    type: :object,
-    properties: %{
-      client_name: %Schema{type: :string, description: "A name for your application."},
-      redirect_uris: %Schema{
-        type: :string,
-        description:
-          "Where the user should be redirected after authorization. To display the authorization code to the user instead of redirecting to a web page, use `urn:ietf:wg:oauth:2.0:oob` in this parameter."
-      },
-      scopes: %Schema{
-        type: :string,
-        description: "Space separated list of scopes. If none is provided, defaults to `read`."
-      },
-      website: %Schema{type: :string, description: "A URL to the homepage of your app"}
-    },
-    required: [:client_name, :redirect_uris],
-    example: %{
-      "client_name" => "My App",
-      "redirect_uris" => "https://myapp.com/auth/callback",
-      "website" => "https://myapp.com/"
-    }
-  })
-end
diff --git a/lib/pleroma/web/api_spec/schemas/app_create_response.ex b/lib/pleroma/web/api_spec/schemas/app_create_response.ex
deleted file mode 100644
index f290fb031..000000000
--- a/lib/pleroma/web/api_spec/schemas/app_create_response.ex
+++ /dev/null
@@ -1,33 +0,0 @@
-# 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.Schemas.AppCreateResponse do
-  alias OpenApiSpex.Schema
-
-  require OpenApiSpex
-
-  OpenApiSpex.schema(%{
-    title: "AppCreateResponse",
-    description: "Response schema for an app",
-    type: :object,
-    properties: %{
-      id: %Schema{type: :string},
-      name: %Schema{type: :string},
-      client_id: %Schema{type: :string},
-      client_secret: %Schema{type: :string},
-      redirect_uri: %Schema{type: :string},
-      vapid_key: %Schema{type: :string},
-      website: %Schema{type: :string, nullable: true}
-    },
-    example: %{
-      "id" => "123",
-      "name" => "My App",
-      "client_id" => "TWhM-tNSuncnqN7DBJmoyeLnk6K3iJJ71KKXxgL1hPM",
-      "client_secret" => "ZEaFUFmF0umgBX1qKJDjaU99Q31lDkOU8NutzTOoliw",
-      "vapid_key" =>
-        "BCk-QqERU0q-CfYZjcuB6lnyyOYfJ2AifKqfeGIm7Z-HiTU5T9eTG5GxVA0_OH5mMlI4UkkDTpaZwozy0TzdZ2M=",
-      "website" => "https://myapp.com/"
-    }
-  })
-end
diff --git a/lib/pleroma/web/api_spec/schemas/custom_emojis_response.ex b/lib/pleroma/web/api_spec/schemas/custom_emojis_response.ex
deleted file mode 100644
index 01582a63d..000000000
--- a/lib/pleroma/web/api_spec/schemas/custom_emojis_response.ex
+++ /dev/null
@@ -1,42 +0,0 @@
-# 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.Schemas.CustomEmojisResponse do
-  alias Pleroma.Web.ApiSpec.Schemas.CustomEmoji
-
-  require OpenApiSpex
-
-  OpenApiSpex.schema(%{
-    title: "CustomEmojisResponse",
-    description: "Response schema for custom emojis",
-    type: :array,
-    items: CustomEmoji,
-    example: [
-      %{
-        "category" => "Fun",
-        "shortcode" => "blank",
-        "static_url" => "https://lain.com/emoji/blank.png",
-        "tags" => ["Fun"],
-        "url" => "https://lain.com/emoji/blank.png",
-        "visible_in_picker" => true
-      },
-      %{
-        "category" => "Gif,Fun",
-        "shortcode" => "firefox",
-        "static_url" => "https://lain.com/emoji/Firefox.gif",
-        "tags" => ["Gif", "Fun"],
-        "url" => "https://lain.com/emoji/Firefox.gif",
-        "visible_in_picker" => true
-      },
-      %{
-        "category" => "pack:mixed",
-        "shortcode" => "sadcat",
-        "static_url" => "https://lain.com/emoji/mixed/sadcat.png",
-        "tags" => ["pack:mixed"],
-        "url" => "https://lain.com/emoji/mixed/sadcat.png",
-        "visible_in_picker" => true
-      }
-    ]
-  })
-end
diff --git a/lib/pleroma/web/api_spec/schemas/domain_block_request.ex b/lib/pleroma/web/api_spec/schemas/domain_block_request.ex
deleted file mode 100644
index ee9238361..000000000
--- a/lib/pleroma/web/api_spec/schemas/domain_block_request.ex
+++ /dev/null
@@ -1,20 +0,0 @@
-# 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.Schemas.DomainBlockRequest do
-  alias OpenApiSpex.Schema
-  require OpenApiSpex
-
-  OpenApiSpex.schema(%{
-    title: "DomainBlockRequest",
-    type: :object,
-    properties: %{
-      domain: %Schema{type: :string}
-    },
-    required: [:domain],
-    example: %{
-      "domain" => "facebook.com"
-    }
-  })
-end
diff --git a/lib/pleroma/web/api_spec/schemas/domain_blocks_response.ex b/lib/pleroma/web/api_spec/schemas/domain_blocks_response.ex
deleted file mode 100644
index d895aca4e..000000000
--- a/lib/pleroma/web/api_spec/schemas/domain_blocks_response.ex
+++ /dev/null
@@ -1,16 +0,0 @@
-# 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.Schemas.DomainBlocksResponse do
-  require OpenApiSpex
-  alias OpenApiSpex.Schema
-
-  OpenApiSpex.schema(%{
-    title: "DomainBlocksResponse",
-    description: "Response schema for domain blocks",
-    type: :array,
-    items: %Schema{type: :string},
-    example: ["google.com", "facebook.com"]
-  })
-end
diff --git a/lib/pleroma/web/common_api/activity_draft.ex b/lib/pleroma/web/common_api/activity_draft.ex
index fbffa3339..4c0acd644 100644
--- a/lib/pleroma/web/common_api/activity_draft.ex
+++ b/lib/pleroma/web/common_api/activity_draft.ex
@@ -84,14 +84,18 @@ defmodule Pleroma.Web.CommonAPI.ActivityDraft do
     %__MODULE__{draft | attachments: attachments}
   end
 
-  defp in_reply_to(draft) do
-    case Map.get(draft.params, "in_reply_to_status_id") do
-      "" -> draft
-      nil -> draft
-      id -> %__MODULE__{draft | in_reply_to: Activity.get_by_id(id)}
-    end
+  defp in_reply_to(%{params: %{"in_reply_to_status_id" => ""}} = draft), do: draft
+
+  defp in_reply_to(%{params: %{"in_reply_to_status_id" => id}} = draft) when is_binary(id) do
+    %__MODULE__{draft | in_reply_to: Activity.get_by_id(id)}
   end
 
+  defp in_reply_to(%{params: %{"in_reply_to_status_id" => %Activity{} = in_reply_to}} = draft) do
+    %__MODULE__{draft | in_reply_to: in_reply_to}
+  end
+
+  defp in_reply_to(draft), do: draft
+
   defp in_reply_to_conversation(draft) do
     in_reply_to_conversation = Participation.get(draft.params["in_reply_to_conversation_id"])
     %__MODULE__{draft | in_reply_to_conversation: in_reply_to_conversation}
diff --git a/lib/pleroma/web/mastodon_api/controllers/timeline_controller.ex b/lib/pleroma/web/mastodon_api/controllers/timeline_controller.ex
index b3c58005e..403d500e0 100644
--- a/lib/pleroma/web/mastodon_api/controllers/timeline_controller.ex
+++ b/lib/pleroma/web/mastodon_api/controllers/timeline_controller.ex
@@ -37,6 +37,7 @@ defmodule Pleroma.Web.MastodonAPI.TimelineController do
       |> Map.put("type", ["Create", "Announce"])
       |> Map.put("blocking_user", user)
       |> Map.put("muting_user", user)
+      |> Map.put("reply_filtering_user", user)
       |> Map.put("user", user)
 
     recipients = [user.ap_id | User.following(user)]
@@ -100,6 +101,7 @@ defmodule Pleroma.Web.MastodonAPI.TimelineController do
         |> Map.put("local_only", local_only)
         |> Map.put("blocking_user", user)
         |> Map.put("muting_user", user)
+        |> Map.put("reply_filtering_user", user)
         |> ActivityPub.fetch_public_activities()
 
       conn
diff --git a/lib/pleroma/web/mastodon_api/views/status_view.ex b/lib/pleroma/web/mastodon_api/views/status_view.ex
index b5850e1ae..1d9082c09 100644
--- a/lib/pleroma/web/mastodon_api/views/status_view.ex
+++ b/lib/pleroma/web/mastodon_api/views/status_view.ex
@@ -45,7 +45,7 @@ defmodule Pleroma.Web.MastodonAPI.StatusView do
     end)
   end
 
-  defp get_user(ap_id) do
+  def get_user(ap_id, fake_record_fallback \\ true) do
     cond do
       user = User.get_cached_by_ap_id(ap_id) ->
         user
@@ -53,8 +53,12 @@ defmodule Pleroma.Web.MastodonAPI.StatusView do
       user = User.get_by_guessed_nickname(ap_id) ->
         user
 
-      true ->
+      fake_record_fallback ->
+        # TODO: refactor (fake records is never a good idea)
         User.error_user(ap_id)
+
+      true ->
+        nil
     end
   end
 
@@ -97,7 +101,11 @@ defmodule Pleroma.Web.MastodonAPI.StatusView do
           UserRelationship.view_relationships_option(nil, [])
 
         true ->
-          actors = Enum.map(activities ++ parent_activities, &get_user(&1.data["actor"]))
+          # Note: unresolved users are filtered out
+          actors =
+            (activities ++ parent_activities)
+            |> Enum.map(&get_user(&1.data["actor"], false))
+            |> Enum.filter(& &1)
 
           UserRelationship.view_relationships_option(reading_user, actors,
             source_mutes_only: opts[:skip_relationships]
diff --git a/lib/pleroma/web/mongooseim/mongoose_im_controller.ex b/lib/pleroma/web/mongooseim/mongoose_im_controller.ex
index 04d823b36..1ed6ee521 100644
--- a/lib/pleroma/web/mongooseim/mongoose_im_controller.ex
+++ b/lib/pleroma/web/mongooseim/mongoose_im_controller.ex
@@ -14,7 +14,7 @@ defmodule Pleroma.Web.MongooseIM.MongooseIMController do
   plug(RateLimiter, [name: :authentication, params: ["user"]] when action == :check_password)
 
   def user_exists(conn, %{"user" => username}) do
-    with %User{} <- Repo.get_by(User, nickname: username, local: true) do
+    with %User{} <- Repo.get_by(User, nickname: username, local: true, deactivated: false) do
       conn
       |> json(true)
     else
@@ -26,7 +26,7 @@ defmodule Pleroma.Web.MongooseIM.MongooseIMController do
   end
 
   def check_password(conn, %{"user" => username, "pass" => password}) do
-    with %User{password_hash: password_hash} <-
+    with %User{password_hash: password_hash, deactivated: false} <-
            Repo.get_by(User, nickname: username, local: true),
          true <- Pbkdf2.checkpw(password, password_hash) do
       conn
diff --git a/lib/pleroma/web/oauth/scopes.ex b/lib/pleroma/web/oauth/scopes.ex
index 1023f16d4..6f06f1431 100644
--- a/lib/pleroma/web/oauth/scopes.ex
+++ b/lib/pleroma/web/oauth/scopes.ex
@@ -17,12 +17,8 @@ defmodule Pleroma.Web.OAuth.Scopes do
   """
   @spec fetch_scopes(map() | struct(), list()) :: list()
 
-  def fetch_scopes(%Pleroma.Web.ApiSpec.Schemas.AppCreateRequest{scopes: scopes}, default) do
-    parse_scopes(scopes, default)
-  end
-
   def fetch_scopes(params, default) do
-    parse_scopes(params["scope"] || params["scopes"], default)
+    parse_scopes(params["scope"] || params["scopes"] || params[:scopes], default)
   end
 
   def parse_scopes(scopes, _default) when is_list(scopes) do
diff --git a/test/support/api_spec_helpers.ex b/test/support/api_spec_helpers.ex
new file mode 100644
index 000000000..80c69c788
--- /dev/null
+++ b/test/support/api_spec_helpers.ex
@@ -0,0 +1,57 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.Tests.ApiSpecHelpers do
+  @moduledoc """
+  OpenAPI spec test helpers
+  """
+
+  import ExUnit.Assertions
+
+  alias OpenApiSpex.Cast.Error
+  alias OpenApiSpex.Reference
+  alias OpenApiSpex.Schema
+
+  def assert_schema(value, schema) do
+    api_spec = Pleroma.Web.ApiSpec.spec()
+
+    case OpenApiSpex.cast_value(value, schema, api_spec) do
+      {:ok, data} ->
+        data
+
+      {:error, errors} ->
+        errors =
+          Enum.map(errors, fn error ->
+            message = Error.message(error)
+            path = Error.path_to_string(error)
+            "#{message} at #{path}"
+          end)
+
+        flunk(
+          "Value does not conform to schema #{schema.title}: #{Enum.join(errors, "\n")}\n#{
+            inspect(value)
+          }"
+        )
+    end
+  end
+
+  def resolve_schema(%Schema{} = schema), do: schema
+
+  def resolve_schema(%Reference{} = ref) do
+    schemas = Pleroma.Web.ApiSpec.spec().components.schemas
+    Reference.resolve_schema(ref, schemas)
+  end
+
+  def api_operations do
+    paths = Pleroma.Web.ApiSpec.spec().paths
+
+    Enum.flat_map(paths, fn {_, path_item} ->
+      path_item
+      |> Map.take([:delete, :get, :head, :options, :patch, :post, :put, :trace])
+      |> Map.values()
+      |> Enum.reject(&is_nil/1)
+      |> Enum.uniq()
+    end)
+  end
+end
diff --git a/test/support/conn_case.ex b/test/support/conn_case.ex
index 064874201..781622476 100644
--- a/test/support/conn_case.ex
+++ b/test/support/conn_case.ex
@@ -51,6 +51,42 @@ defmodule Pleroma.Web.ConnCase do
         %{user: user, token: token, conn: conn}
       end
 
+      defp json_response_and_validate_schema(conn, status \\ nil) do
+        content_type =
+          conn
+          |> Plug.Conn.get_resp_header("content-type")
+          |> List.first()
+          |> String.split(";")
+          |> List.first()
+
+        status = status || conn.status
+
+        %{private: %{open_api_spex: %{operation_id: op_id, operation_lookup: lookup, spec: spec}}} =
+          conn
+
+        schema = lookup[op_id].responses[status].content[content_type].schema
+        json = json_response(conn, status)
+
+        case OpenApiSpex.cast_value(json, schema, spec) do
+          {:ok, _data} ->
+            json
+
+          {:error, errors} ->
+            errors =
+              Enum.map(errors, fn error ->
+                message = OpenApiSpex.Cast.Error.message(error)
+                path = OpenApiSpex.Cast.Error.path_to_string(error)
+                "#{message} at #{path}"
+              end)
+
+            flunk(
+              "Response does not conform to schema of #{op_id} operation: #{
+                Enum.join(errors, "\n")
+              }\n#{inspect(json)}"
+            )
+        end
+      end
+
       defp ensure_federating_or_authenticated(conn, url, user) do
         initial_setting = Config.get([:instance, :federating])
         on_exit(fn -> Config.put([:instance, :federating], initial_setting) end)
diff --git a/test/web/activity_pub/activity_pub_test.exs b/test/web/activity_pub/activity_pub_test.exs
index d3b2e36da..7f864eb53 100644
--- a/test/web/activity_pub/activity_pub_test.exs
+++ b/test/web/activity_pub/activity_pub_test.exs
@@ -1911,6 +1911,499 @@ defmodule Pleroma.Web.ActivityPub.ActivityPubTest do
     end
   end
 
+  test "doesn't retrieve replies activities with exclude_replies" do
+    user = insert(:user)
+
+    {:ok, activity} = CommonAPI.post(user, %{"status" => "yeah"})
+
+    {:ok, _reply} =
+      CommonAPI.post(user, %{"status" => "yeah", "in_reply_to_status_id" => activity.id})
+
+    [result] = ActivityPub.fetch_public_activities(%{"exclude_replies" => "true"})
+
+    assert result.id == activity.id
+
+    assert length(ActivityPub.fetch_public_activities()) == 2
+  end
+
+  describe "replies filtering with public messages" do
+    setup :public_messages
+
+    test "public timeline", %{users: %{u1: user}} do
+      activities_ids =
+        %{}
+        |> Map.put("type", ["Create", "Announce"])
+        |> Map.put("local_only", false)
+        |> Map.put("blocking_user", user)
+        |> Map.put("muting_user", user)
+        |> Map.put("reply_filtering_user", user)
+        |> ActivityPub.fetch_public_activities()
+        |> Enum.map(& &1.id)
+
+      assert length(activities_ids) == 16
+    end
+
+    test "public timeline with reply_visibility `following`", %{
+      users: %{u1: user},
+      u1: u1,
+      u2: u2,
+      u3: u3,
+      u4: u4,
+      activities: activities
+    } do
+      activities_ids =
+        %{}
+        |> Map.put("type", ["Create", "Announce"])
+        |> Map.put("local_only", false)
+        |> Map.put("blocking_user", user)
+        |> Map.put("muting_user", user)
+        |> Map.put("reply_visibility", "following")
+        |> Map.put("reply_filtering_user", user)
+        |> ActivityPub.fetch_public_activities()
+        |> Enum.map(& &1.id)
+
+      assert length(activities_ids) == 14
+
+      visible_ids =
+        Map.values(u1) ++ Map.values(u2) ++ Map.values(u4) ++ Map.values(activities) ++ [u3[:r1]]
+
+      assert Enum.all?(visible_ids, &(&1 in activities_ids))
+    end
+
+    test "public timeline with reply_visibility `self`", %{
+      users: %{u1: user},
+      u1: u1,
+      u2: u2,
+      u3: u3,
+      u4: u4,
+      activities: activities
+    } do
+      activities_ids =
+        %{}
+        |> Map.put("type", ["Create", "Announce"])
+        |> Map.put("local_only", false)
+        |> Map.put("blocking_user", user)
+        |> Map.put("muting_user", user)
+        |> Map.put("reply_visibility", "self")
+        |> Map.put("reply_filtering_user", user)
+        |> ActivityPub.fetch_public_activities()
+        |> Enum.map(& &1.id)
+
+      assert length(activities_ids) == 10
+      visible_ids = Map.values(u1) ++ [u2[:r1], u3[:r1], u4[:r1]] ++ Map.values(activities)
+      assert Enum.all?(visible_ids, &(&1 in activities_ids))
+    end
+
+    test "home timeline", %{
+      users: %{u1: user},
+      activities: activities,
+      u1: u1,
+      u2: u2,
+      u3: u3,
+      u4: u4
+    } do
+      params =
+        %{}
+        |> Map.put("type", ["Create", "Announce"])
+        |> Map.put("blocking_user", user)
+        |> Map.put("muting_user", user)
+        |> Map.put("user", user)
+        |> Map.put("reply_filtering_user", user)
+
+      activities_ids =
+        ActivityPub.fetch_activities([user.ap_id | User.following(user)], params)
+        |> Enum.map(& &1.id)
+
+      assert length(activities_ids) == 13
+
+      visible_ids =
+        Map.values(u1) ++
+          Map.values(u3) ++
+          [
+            activities[:a1],
+            activities[:a2],
+            activities[:a4],
+            u2[:r1],
+            u2[:r3],
+            u4[:r1],
+            u4[:r2]
+          ]
+
+      assert Enum.all?(visible_ids, &(&1 in activities_ids))
+    end
+
+    test "home timeline with reply_visibility `following`", %{
+      users: %{u1: user},
+      activities: activities,
+      u1: u1,
+      u2: u2,
+      u3: u3,
+      u4: u4
+    } do
+      params =
+        %{}
+        |> Map.put("type", ["Create", "Announce"])
+        |> Map.put("blocking_user", user)
+        |> Map.put("muting_user", user)
+        |> Map.put("user", user)
+        |> Map.put("reply_visibility", "following")
+        |> Map.put("reply_filtering_user", user)
+
+      activities_ids =
+        ActivityPub.fetch_activities([user.ap_id | User.following(user)], params)
+        |> Enum.map(& &1.id)
+
+      assert length(activities_ids) == 11
+
+      visible_ids =
+        Map.values(u1) ++
+          [
+            activities[:a1],
+            activities[:a2],
+            activities[:a4],
+            u2[:r1],
+            u2[:r3],
+            u3[:r1],
+            u4[:r1],
+            u4[:r2]
+          ]
+
+      assert Enum.all?(visible_ids, &(&1 in activities_ids))
+    end
+
+    test "home timeline with reply_visibility `self`", %{
+      users: %{u1: user},
+      activities: activities,
+      u1: u1,
+      u2: u2,
+      u3: u3,
+      u4: u4
+    } do
+      params =
+        %{}
+        |> Map.put("type", ["Create", "Announce"])
+        |> Map.put("blocking_user", user)
+        |> Map.put("muting_user", user)
+        |> Map.put("user", user)
+        |> Map.put("reply_visibility", "self")
+        |> Map.put("reply_filtering_user", user)
+
+      activities_ids =
+        ActivityPub.fetch_activities([user.ap_id | User.following(user)], params)
+        |> Enum.map(& &1.id)
+
+      assert length(activities_ids) == 9
+
+      visible_ids =
+        Map.values(u1) ++
+          [
+            activities[:a1],
+            activities[:a2],
+            activities[:a4],
+            u2[:r1],
+            u3[:r1],
+            u4[:r1]
+          ]
+
+      assert Enum.all?(visible_ids, &(&1 in activities_ids))
+    end
+  end
+
+  describe "replies filtering with private messages" do
+    setup :private_messages
+
+    test "public timeline", %{users: %{u1: user}} do
+      activities_ids =
+        %{}
+        |> Map.put("type", ["Create", "Announce"])
+        |> Map.put("local_only", false)
+        |> Map.put("blocking_user", user)
+        |> Map.put("muting_user", user)
+        |> Map.put("user", user)
+        |> ActivityPub.fetch_public_activities()
+        |> Enum.map(& &1.id)
+
+      assert activities_ids == []
+    end
+
+    test "public timeline with default reply_visibility `following`", %{users: %{u1: user}} do
+      activities_ids =
+        %{}
+        |> Map.put("type", ["Create", "Announce"])
+        |> Map.put("local_only", false)
+        |> Map.put("blocking_user", user)
+        |> Map.put("muting_user", user)
+        |> Map.put("reply_visibility", "following")
+        |> Map.put("reply_filtering_user", user)
+        |> Map.put("user", user)
+        |> ActivityPub.fetch_public_activities()
+        |> Enum.map(& &1.id)
+
+      assert activities_ids == []
+    end
+
+    test "public timeline with default reply_visibility `self`", %{users: %{u1: user}} do
+      activities_ids =
+        %{}
+        |> Map.put("type", ["Create", "Announce"])
+        |> Map.put("local_only", false)
+        |> Map.put("blocking_user", user)
+        |> Map.put("muting_user", user)
+        |> Map.put("reply_visibility", "self")
+        |> Map.put("reply_filtering_user", user)
+        |> Map.put("user", user)
+        |> ActivityPub.fetch_public_activities()
+        |> Enum.map(& &1.id)
+
+      assert activities_ids == []
+    end
+
+    test "home timeline", %{users: %{u1: user}} do
+      params =
+        %{}
+        |> Map.put("type", ["Create", "Announce"])
+        |> Map.put("blocking_user", user)
+        |> Map.put("muting_user", user)
+        |> Map.put("user", user)
+
+      activities_ids =
+        ActivityPub.fetch_activities([user.ap_id | User.following(user)], params)
+        |> Enum.map(& &1.id)
+
+      assert length(activities_ids) == 12
+    end
+
+    test "home timeline with default reply_visibility `following`", %{users: %{u1: user}} do
+      params =
+        %{}
+        |> Map.put("type", ["Create", "Announce"])
+        |> Map.put("blocking_user", user)
+        |> Map.put("muting_user", user)
+        |> Map.put("user", user)
+        |> Map.put("reply_visibility", "following")
+        |> Map.put("reply_filtering_user", user)
+
+      activities_ids =
+        ActivityPub.fetch_activities([user.ap_id | User.following(user)], params)
+        |> Enum.map(& &1.id)
+
+      assert length(activities_ids) == 12
+    end
+
+    test "home timeline with default reply_visibility `self`", %{
+      users: %{u1: user},
+      activities: activities,
+      u1: u1,
+      u2: u2,
+      u3: u3,
+      u4: u4
+    } do
+      params =
+        %{}
+        |> Map.put("type", ["Create", "Announce"])
+        |> Map.put("blocking_user", user)
+        |> Map.put("muting_user", user)
+        |> Map.put("user", user)
+        |> Map.put("reply_visibility", "self")
+        |> Map.put("reply_filtering_user", user)
+
+      activities_ids =
+        ActivityPub.fetch_activities([user.ap_id | User.following(user)], params)
+        |> Enum.map(& &1.id)
+
+      assert length(activities_ids) == 10
+
+      visible_ids =
+        Map.values(u1) ++ Map.values(u4) ++ [u2[:r1], u3[:r1]] ++ Map.values(activities)
+
+      assert Enum.all?(visible_ids, &(&1 in activities_ids))
+    end
+  end
+
+  defp public_messages(_) do
+    [u1, u2, u3, u4] = insert_list(4, :user)
+    {:ok, u1} = User.follow(u1, u2)
+    {:ok, u2} = User.follow(u2, u1)
+    {:ok, u1} = User.follow(u1, u4)
+    {:ok, u4} = User.follow(u4, u1)
+
+    {:ok, u2} = User.follow(u2, u3)
+    {:ok, u3} = User.follow(u3, u2)
+
+    {:ok, a1} = CommonAPI.post(u1, %{"status" => "Status"})
+
+    {:ok, r1_1} =
+      CommonAPI.post(u2, %{
+        "status" => "@#{u1.nickname} reply from u2 to u1",
+        "in_reply_to_status_id" => a1.id
+      })
+
+    {:ok, r1_2} =
+      CommonAPI.post(u3, %{
+        "status" => "@#{u1.nickname} reply from u3 to u1",
+        "in_reply_to_status_id" => a1.id
+      })
+
+    {:ok, r1_3} =
+      CommonAPI.post(u4, %{
+        "status" => "@#{u1.nickname} reply from u4 to u1",
+        "in_reply_to_status_id" => a1.id
+      })
+
+    {:ok, a2} = CommonAPI.post(u2, %{"status" => "Status"})
+
+    {:ok, r2_1} =
+      CommonAPI.post(u1, %{
+        "status" => "@#{u2.nickname} reply from u1 to u2",
+        "in_reply_to_status_id" => a2.id
+      })
+
+    {:ok, r2_2} =
+      CommonAPI.post(u3, %{
+        "status" => "@#{u2.nickname} reply from u3 to u2",
+        "in_reply_to_status_id" => a2.id
+      })
+
+    {:ok, r2_3} =
+      CommonAPI.post(u4, %{
+        "status" => "@#{u2.nickname} reply from u4 to u2",
+        "in_reply_to_status_id" => a2.id
+      })
+
+    {:ok, a3} = CommonAPI.post(u3, %{"status" => "Status"})
+
+    {:ok, r3_1} =
+      CommonAPI.post(u1, %{
+        "status" => "@#{u3.nickname} reply from u1 to u3",
+        "in_reply_to_status_id" => a3.id
+      })
+
+    {:ok, r3_2} =
+      CommonAPI.post(u2, %{
+        "status" => "@#{u3.nickname} reply from u2 to u3",
+        "in_reply_to_status_id" => a3.id
+      })
+
+    {:ok, r3_3} =
+      CommonAPI.post(u4, %{
+        "status" => "@#{u3.nickname} reply from u4 to u3",
+        "in_reply_to_status_id" => a3.id
+      })
+
+    {:ok, a4} = CommonAPI.post(u4, %{"status" => "Status"})
+
+    {:ok, r4_1} =
+      CommonAPI.post(u1, %{
+        "status" => "@#{u4.nickname} reply from u1 to u4",
+        "in_reply_to_status_id" => a4.id
+      })
+
+    {:ok, r4_2} =
+      CommonAPI.post(u2, %{
+        "status" => "@#{u4.nickname} reply from u2 to u4",
+        "in_reply_to_status_id" => a4.id
+      })
+
+    {:ok, r4_3} =
+      CommonAPI.post(u3, %{
+        "status" => "@#{u4.nickname} reply from u3 to u4",
+        "in_reply_to_status_id" => a4.id
+      })
+
+    {:ok,
+     users: %{u1: u1, u2: u2, u3: u3, u4: u4},
+     activities: %{a1: a1.id, a2: a2.id, a3: a3.id, a4: a4.id},
+     u1: %{r1: r1_1.id, r2: r1_2.id, r3: r1_3.id},
+     u2: %{r1: r2_1.id, r2: r2_2.id, r3: r2_3.id},
+     u3: %{r1: r3_1.id, r2: r3_2.id, r3: r3_3.id},
+     u4: %{r1: r4_1.id, r2: r4_2.id, r3: r4_3.id}}
+  end
+
+  defp private_messages(_) do
+    [u1, u2, u3, u4] = insert_list(4, :user)
+    {:ok, u1} = User.follow(u1, u2)
+    {:ok, u2} = User.follow(u2, u1)
+    {:ok, u1} = User.follow(u1, u3)
+    {:ok, u3} = User.follow(u3, u1)
+    {:ok, u1} = User.follow(u1, u4)
+    {:ok, u4} = User.follow(u4, u1)
+
+    {:ok, u2} = User.follow(u2, u3)
+    {:ok, u3} = User.follow(u3, u2)
+
+    {:ok, a1} = CommonAPI.post(u1, %{"status" => "Status", "visibility" => "private"})
+
+    {:ok, r1_1} =
+      CommonAPI.post(u2, %{
+        "status" => "@#{u1.nickname} reply from u2 to u1",
+        "in_reply_to_status_id" => a1.id,
+        "visibility" => "private"
+      })
+
+    {:ok, r1_2} =
+      CommonAPI.post(u3, %{
+        "status" => "@#{u1.nickname} reply from u3 to u1",
+        "in_reply_to_status_id" => a1.id,
+        "visibility" => "private"
+      })
+
+    {:ok, r1_3} =
+      CommonAPI.post(u4, %{
+        "status" => "@#{u1.nickname} reply from u4 to u1",
+        "in_reply_to_status_id" => a1.id,
+        "visibility" => "private"
+      })
+
+    {:ok, a2} = CommonAPI.post(u2, %{"status" => "Status", "visibility" => "private"})
+
+    {:ok, r2_1} =
+      CommonAPI.post(u1, %{
+        "status" => "@#{u2.nickname} reply from u1 to u2",
+        "in_reply_to_status_id" => a2.id,
+        "visibility" => "private"
+      })
+
+    {:ok, r2_2} =
+      CommonAPI.post(u3, %{
+        "status" => "@#{u2.nickname} reply from u3 to u2",
+        "in_reply_to_status_id" => a2.id,
+        "visibility" => "private"
+      })
+
+    {:ok, a3} = CommonAPI.post(u3, %{"status" => "Status", "visibility" => "private"})
+
+    {:ok, r3_1} =
+      CommonAPI.post(u1, %{
+        "status" => "@#{u3.nickname} reply from u1 to u3",
+        "in_reply_to_status_id" => a3.id,
+        "visibility" => "private"
+      })
+
+    {:ok, r3_2} =
+      CommonAPI.post(u2, %{
+        "status" => "@#{u3.nickname} reply from u2 to u3",
+        "in_reply_to_status_id" => a3.id,
+        "visibility" => "private"
+      })
+
+    {:ok, a4} = CommonAPI.post(u4, %{"status" => "Status", "visibility" => "private"})
+
+    {:ok, r4_1} =
+      CommonAPI.post(u1, %{
+        "status" => "@#{u4.nickname} reply from u1 to u4",
+        "in_reply_to_status_id" => a4.id,
+        "visibility" => "private"
+      })
+
+    {:ok,
+     users: %{u1: u1, u2: u2, u3: u3, u4: u4},
+     activities: %{a1: a1.id, a2: a2.id, a3: a3.id, a4: a4.id},
+     u1: %{r1: r1_1.id, r2: r1_2.id, r3: r1_3.id},
+     u2: %{r1: r2_1.id, r2: r2_2.id},
+     u3: %{r1: r3_1.id, r2: r3_2.id},
+     u4: %{r1: r4_1.id}}
+  end
+
   describe "global activity expiration" do
     setup do: clear_config([:instance, :rewrite_policy])
 
diff --git a/test/web/api_spec/app_operation_test.exs b/test/web/api_spec/app_operation_test.exs
deleted file mode 100644
index 5b96abb44..000000000
--- a/test/web/api_spec/app_operation_test.exs
+++ /dev/null
@@ -1,45 +0,0 @@
-# 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.AppOperationTest do
-  use Pleroma.Web.ConnCase, async: true
-
-  alias Pleroma.Web.ApiSpec
-  alias Pleroma.Web.ApiSpec.Schemas.AppCreateRequest
-  alias Pleroma.Web.ApiSpec.Schemas.AppCreateResponse
-
-  import OpenApiSpex.TestAssertions
-  import Pleroma.Factory
-
-  test "AppCreateRequest example matches schema" do
-    api_spec = ApiSpec.spec()
-    schema = AppCreateRequest.schema()
-    assert_schema(schema.example, "AppCreateRequest", api_spec)
-  end
-
-  test "AppCreateResponse example matches schema" do
-    api_spec = ApiSpec.spec()
-    schema = AppCreateResponse.schema()
-    assert_schema(schema.example, "AppCreateResponse", api_spec)
-  end
-
-  test "AppController produces a AppCreateResponse", %{conn: conn} do
-    api_spec = ApiSpec.spec()
-    app_attrs = build(:oauth_app)
-
-    json =
-      conn
-      |> put_req_header("content-type", "application/json")
-      |> post(
-        "/api/v1/apps",
-        Jason.encode!(%{
-          client_name: app_attrs.client_name,
-          redirect_uris: app_attrs.redirect_uris
-        })
-      )
-      |> json_response(200)
-
-    assert_schema(json, "AppCreateResponse", api_spec)
-  end
-end
diff --git a/test/web/api_spec/schema_examples_test.exs b/test/web/api_spec/schema_examples_test.exs
new file mode 100644
index 000000000..88b6f07cb
--- /dev/null
+++ b/test/web/api_spec/schema_examples_test.exs
@@ -0,0 +1,43 @@
+# 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.SchemaExamplesTest do
+  use ExUnit.Case, async: true
+  import Pleroma.Tests.ApiSpecHelpers
+
+  @content_type "application/json"
+
+  for operation <- api_operations() do
+    describe operation.operationId <> " Request Body" do
+      if operation.requestBody do
+        @media_type operation.requestBody.content[@content_type]
+        @schema resolve_schema(@media_type.schema)
+
+        if @media_type.example do
+          test "request body media type example matches schema" do
+            assert_schema(@media_type.example, @schema)
+          end
+        end
+
+        if @schema.example do
+          test "request body schema example matches schema" do
+            assert_schema(@schema.example, @schema)
+          end
+        end
+      end
+    end
+
+    for {status, response} <- operation.responses do
+      describe "#{operation.operationId} - #{status} Response" do
+        @schema resolve_schema(response.content[@content_type].schema)
+
+        if @schema.example do
+          test "example matches schema" do
+            assert_schema(@schema.example, @schema)
+          end
+        end
+      end
+    end
+  end
+end
diff --git a/test/web/common_api/common_api_test.exs b/test/web/common_api/common_api_test.exs
index e87193c83..1758662b0 100644
--- a/test/web/common_api/common_api_test.exs
+++ b/test/web/common_api/common_api_test.exs
@@ -48,6 +48,33 @@ defmodule Pleroma.Web.CommonAPITest do
     assert object.data["like_count"] == 20
   end
 
+  test "repeating race condition" do
+    user = insert(:user)
+    users_serial = insert_list(10, :user)
+    users = insert_list(10, :user)
+
+    {:ok, activity} = CommonAPI.post(user, %{"status" => "."})
+
+    users_serial
+    |> Enum.map(fn user ->
+      CommonAPI.repeat(activity.id, user)
+    end)
+
+    object = Object.get_by_ap_id(activity.data["object"])
+    assert object.data["announcement_count"] == 10
+
+    users
+    |> Enum.map(fn user ->
+      Task.async(fn ->
+        CommonAPI.repeat(activity.id, user)
+      end)
+    end)
+    |> Enum.map(&Task.await/1)
+
+    object = Object.get_by_ap_id(activity.data["object"])
+    assert object.data["announcement_count"] == 20
+  end
+
   test "when replying to a conversation / participation, it will set the correct context id even if no explicit reply_to is given" do
     user = insert(:user)
     {:ok, activity} = CommonAPI.post(user, %{"status" => ".", "visibility" => "direct"})
diff --git a/test/web/mastodon_api/controllers/app_controller_test.exs b/test/web/mastodon_api/controllers/app_controller_test.exs
index e7b11d14e..a0b8b126c 100644
--- a/test/web/mastodon_api/controllers/app_controller_test.exs
+++ b/test/web/mastodon_api/controllers/app_controller_test.exs
@@ -27,7 +27,7 @@ defmodule Pleroma.Web.MastodonAPI.AppControllerTest do
       "vapid_key" => Push.vapid_config() |> Keyword.get(:public_key)
     }
 
-    assert expected == json_response(conn, 200)
+    assert expected == json_response_and_validate_schema(conn, 200)
   end
 
   test "creates an oauth app", %{conn: conn} do
@@ -55,6 +55,6 @@ defmodule Pleroma.Web.MastodonAPI.AppControllerTest do
       "vapid_key" => Push.vapid_config() |> Keyword.get(:public_key)
     }
 
-    assert expected == json_response(conn, 200)
+    assert expected == json_response_and_validate_schema(conn, 200)
   end
 end
diff --git a/test/web/mastodon_api/controllers/custom_emoji_controller_test.exs b/test/web/mastodon_api/controllers/custom_emoji_controller_test.exs
index 0b2ffa470..4222556a4 100644
--- a/test/web/mastodon_api/controllers/custom_emoji_controller_test.exs
+++ b/test/web/mastodon_api/controllers/custom_emoji_controller_test.exs
@@ -5,15 +5,13 @@
 defmodule Pleroma.Web.MastodonAPI.CustomEmojiControllerTest do
   use Pleroma.Web.ConnCase, async: true
   alias Pleroma.Web.ApiSpec
-  alias Pleroma.Web.ApiSpec.Schemas.CustomEmoji
-  alias Pleroma.Web.ApiSpec.Schemas.CustomEmojisResponse
   import OpenApiSpex.TestAssertions
 
   test "with tags", %{conn: conn} do
     assert resp =
              conn
              |> get("/api/v1/custom_emojis")
-             |> json_response(200)
+             |> json_response_and_validate_schema(200)
 
     assert [emoji | _body] = resp
     assert Map.has_key?(emoji, "shortcode")
@@ -23,19 +21,6 @@ defmodule Pleroma.Web.MastodonAPI.CustomEmojiControllerTest do
     assert Map.has_key?(emoji, "category")
     assert Map.has_key?(emoji, "url")
     assert Map.has_key?(emoji, "visible_in_picker")
-    assert_schema(resp, "CustomEmojisResponse", ApiSpec.spec())
     assert_schema(emoji, "CustomEmoji", ApiSpec.spec())
   end
-
-  test "CustomEmoji example matches schema" do
-    api_spec = ApiSpec.spec()
-    schema = CustomEmoji.schema()
-    assert_schema(schema.example, "CustomEmoji", api_spec)
-  end
-
-  test "CustomEmojisResponse example matches schema" do
-    api_spec = ApiSpec.spec()
-    schema = CustomEmojisResponse.schema()
-    assert_schema(schema.example, "CustomEmojisResponse", api_spec)
-  end
 end
diff --git a/test/web/mastodon_api/controllers/domain_block_controller_test.exs b/test/web/mastodon_api/controllers/domain_block_controller_test.exs
index d66190c90..01a24afcf 100644
--- a/test/web/mastodon_api/controllers/domain_block_controller_test.exs
+++ b/test/web/mastodon_api/controllers/domain_block_controller_test.exs
@@ -6,11 +6,8 @@ defmodule Pleroma.Web.MastodonAPI.DomainBlockControllerTest do
   use Pleroma.Web.ConnCase
 
   alias Pleroma.User
-  alias Pleroma.Web.ApiSpec
-  alias Pleroma.Web.ApiSpec.Schemas.DomainBlocksResponse
 
   import Pleroma.Factory
-  import OpenApiSpex.TestAssertions
 
   test "blocking / unblocking a domain" do
     %{user: user, conn: conn} = oauth_access(["write:blocks"])
@@ -21,7 +18,7 @@ defmodule Pleroma.Web.MastodonAPI.DomainBlockControllerTest do
       |> put_req_header("content-type", "application/json")
       |> post("/api/v1/domain_blocks", %{"domain" => "dogwhistle.zone"})
 
-    assert %{} = json_response(ret_conn, 200)
+    assert %{} == json_response_and_validate_schema(ret_conn, 200)
     user = User.get_cached_by_ap_id(user.ap_id)
     assert User.blocks?(user, other_user)
 
@@ -30,7 +27,7 @@ defmodule Pleroma.Web.MastodonAPI.DomainBlockControllerTest do
       |> put_req_header("content-type", "application/json")
       |> delete("/api/v1/domain_blocks", %{"domain" => "dogwhistle.zone"})
 
-    assert %{} = json_response(ret_conn, 200)
+    assert %{} == json_response_and_validate_schema(ret_conn, 200)
     user = User.get_cached_by_ap_id(user.ap_id)
     refute User.blocks?(user, other_user)
   end
@@ -41,21 +38,10 @@ defmodule Pleroma.Web.MastodonAPI.DomainBlockControllerTest do
     {:ok, user} = User.block_domain(user, "bad.site")
     {:ok, user} = User.block_domain(user, "even.worse.site")
 
-    conn =
-      conn
-      |> assign(:user, user)
-      |> get("/api/v1/domain_blocks")
-
-    domain_blocks = json_response(conn, 200)
-
-    assert "bad.site" in domain_blocks
-    assert "even.worse.site" in domain_blocks
-    assert_schema(domain_blocks, "DomainBlocksResponse", ApiSpec.spec())
-  end
-
-  test "DomainBlocksResponse example matches schema" do
-    api_spec = ApiSpec.spec()
-    schema = DomainBlocksResponse.schema()
-    assert_schema(schema.example, "DomainBlocksResponse", api_spec)
+    assert ["even.worse.site", "bad.site"] ==
+             conn
+             |> assign(:user, user)
+             |> get("/api/v1/domain_blocks")
+             |> json_response_and_validate_schema(200)
   end
 end
diff --git a/test/web/mongooseim/mongoose_im_controller_test.exs b/test/web/mongooseim/mongoose_im_controller_test.exs
index 291ae54fc..1ac2f2c27 100644
--- a/test/web/mongooseim/mongoose_im_controller_test.exs
+++ b/test/web/mongooseim/mongoose_im_controller_test.exs
@@ -9,6 +9,7 @@ defmodule Pleroma.Web.MongooseIMController do
   test "/user_exists", %{conn: conn} do
     _user = insert(:user, nickname: "lain")
     _remote_user = insert(:user, nickname: "alice", local: false)
+    _deactivated_user = insert(:user, nickname: "konata", deactivated: true)
 
     res =
       conn
@@ -30,11 +31,25 @@ defmodule Pleroma.Web.MongooseIMController do
       |> json_response(404)
 
     assert res == false
+
+    res =
+      conn
+      |> get(mongoose_im_path(conn, :user_exists), user: "konata")
+      |> json_response(404)
+
+    assert res == false
   end
 
   test "/check_password", %{conn: conn} do
     user = insert(:user, password_hash: Comeonin.Pbkdf2.hashpwsalt("cool"))
 
+    _deactivated_user =
+      insert(:user,
+        nickname: "konata",
+        deactivated: true,
+        password_hash: Comeonin.Pbkdf2.hashpwsalt("cool")
+      )
+
     res =
       conn
       |> get(mongoose_im_path(conn, :check_password), user: user.nickname, pass: "cool")
@@ -49,6 +64,13 @@ defmodule Pleroma.Web.MongooseIMController do
 
     assert res == false
 
+    res =
+      conn
+      |> get(mongoose_im_path(conn, :check_password), user: "konata", pass: "cool")
+      |> json_response(404)
+
+    assert res == false
+
     res =
       conn
       |> get(mongoose_im_path(conn, :check_password), user: "nobody", pass: "cool")