diff --git a/.gitignore b/.gitignore
index 3b0c7d361..4e71a7df0 100644
--- a/.gitignore
+++ b/.gitignore
@@ -43,7 +43,3 @@ docs/generated_config.md
 # Code test coverage
 /cover
 /Elixir.*.coverdata
-
-.idea
-pleroma.iml
-
diff --git a/config/config.exs b/config/config.exs
index b1b98af93..ab6e00c98 100644
--- a/config/config.exs
+++ b/config/config.exs
@@ -331,10 +331,6 @@
   follow_handshake_timeout: 500,
   sign_object_fetches: true
 
-config :pleroma, :streamer,
-  workers: 3,
-  overflow_workers: 2
-
 config :pleroma, :user, deny_follow_blocked: true
 
 config :pleroma, :mrf_normalize_markup, scrub_policy: Pleroma.HTML.Scrubber.Default
diff --git a/lib/pleroma/activity/ir/topics.ex b/lib/pleroma/activity/ir/topics.ex
deleted file mode 100644
index 010897abc..000000000
--- a/lib/pleroma/activity/ir/topics.ex
+++ /dev/null
@@ -1,63 +0,0 @@
-# Pleroma: A lightweight social networking server
-# Copyright © 2017-2019 Pleroma Authors <https://pleroma.social/>
-# SPDX-License-Identifier: AGPL-3.0-only
-
-defmodule Pleroma.Activity.Ir.Topics do
-  alias Pleroma.Object
-  alias Pleroma.Web.ActivityPub.Visibility
-
-  def get_activity_topics(activity) do
-    activity
-    |> Object.normalize()
-    |> generate_topics(activity)
-    |> List.flatten()
-  end
-
-  defp generate_topics(%{data: %{"type" => "Answer"}}, _) do
-    []
-  end
-
-  defp generate_topics(object, activity) do
-    ["user", "list"] ++ visibility_tags(object, activity)
-  end
-
-  defp visibility_tags(object, activity) do
-    case Visibility.get_visibility(activity) do
-      "public" ->
-        if activity.local do
-          ["public", "public:local"]
-        else
-          ["public"]
-        end
-        |> item_creation_tags(object, activity)
-
-      "direct" ->
-        ["direct"]
-
-      _ ->
-        []
-    end
-  end
-
-  defp item_creation_tags(tags, %{data: %{"type" => "Create"}} = object, activity) do
-    tags ++ hashtags_to_topics(object) ++ attachment_topics(object, activity)
-  end
-
-  defp item_creation_tags(tags, _, _) do
-    tags
-  end
-
-  defp hashtags_to_topics(%{data: %{"tag" => tags}}) do
-    tags
-    |> Enum.filter(&is_bitstring(&1))
-    |> Enum.map(fn tag -> "hashtag:" <> tag end)
-  end
-
-  defp hashtags_to_topics(_), do: []
-
-  defp attachment_topics(%{data: %{"attachment" => []}}, _act), do: []
-
-  defp attachment_topics(_object, %{local: true}), do: ["public:media", "public:local:media"]
-
-  defp attachment_topics(_object, _act), do: ["public:media"]
-end
diff --git a/lib/pleroma/application.ex b/lib/pleroma/application.ex
index 3b37ce630..49094704b 100644
--- a/lib/pleroma/application.ex
+++ b/lib/pleroma/application.ex
@@ -141,7 +141,7 @@ defp oauth_cleanup_enabled?,
   defp streamer_child(:test), do: []
 
   defp streamer_child(_) do
-    [Pleroma.Web.Streamer.supervisor()]
+    [Pleroma.Web.Streamer]
   end
 
   defp oauth_cleanup_child(true),
diff --git a/lib/pleroma/notification.ex b/lib/pleroma/notification.ex
index 8012389ac..b7c880c51 100644
--- a/lib/pleroma/notification.ex
+++ b/lib/pleroma/notification.ex
@@ -210,10 +210,8 @@ def create_notification(%Activity{} = activity, %User{} = user) do
     unless skip?(activity, user) do
       notification = %Notification{user_id: user.id, activity: activity}
       {:ok, notification} = Repo.insert(notification)
-
-      ["user", "user:notification"]
-      |> Streamer.stream(notification)
-
+      Streamer.stream("user", notification)
+      Streamer.stream("user:notification", notification)
       Push.send(notification)
       notification
     end
diff --git a/lib/pleroma/web/activity_pub/activity_pub.ex b/lib/pleroma/web/activity_pub/activity_pub.ex
index bc5ae7fbf..41f6a0f1f 100644
--- a/lib/pleroma/web/activity_pub/activity_pub.ex
+++ b/lib/pleroma/web/activity_pub/activity_pub.ex
@@ -4,7 +4,6 @@
 
 defmodule Pleroma.Web.ActivityPub.ActivityPub do
   alias Pleroma.Activity
-  alias Pleroma.Activity.Ir.Topics
   alias Pleroma.Config
   alias Pleroma.Conversation
   alias Pleroma.Notification
@@ -17,7 +16,6 @@ defmodule Pleroma.Web.ActivityPub.ActivityPub do
   alias Pleroma.User
   alias Pleroma.Web.ActivityPub.MRF
   alias Pleroma.Web.ActivityPub.Transmogrifier
-  alias Pleroma.Web.Streamer
   alias Pleroma.Web.WebFinger
   alias Pleroma.Workers.BackgroundWorker
 
@@ -189,7 +187,9 @@ def stream_out_participations(participations) do
       participations
       |> Repo.preload(:user)
 
-    Streamer.stream("participation", participations)
+    Enum.each(participations, fn participation ->
+      Pleroma.Web.Streamer.stream("participation", participation)
+    end)
   end
 
   def stream_out_participations(%Object{data: %{"context" => context}}, user) do
@@ -208,15 +208,41 @@ def stream_out_participations(%Object{data: %{"context" => context}}, user) do
 
   def stream_out_participations(_, _), do: :noop
 
-  def stream_out(%Activity{data: %{"type" => data_type}} = activity)
-      when data_type in ["Create", "Announce", "Delete"] do
-    activity
-    |> Topics.get_activity_topics()
-    |> Streamer.stream(activity)
-  end
+  def stream_out(activity) do
+    if activity.data["type"] in ["Create", "Announce", "Delete"] do
+      object = Object.normalize(activity)
+      # Do not stream out poll replies
+      unless object.data["type"] == "Answer" do
+        Pleroma.Web.Streamer.stream("user", activity)
+        Pleroma.Web.Streamer.stream("list", activity)
 
-  def stream_out(_activity) do
-    :noop
+        if get_visibility(activity) == "public" do
+          Pleroma.Web.Streamer.stream("public", activity)
+
+          if activity.local do
+            Pleroma.Web.Streamer.stream("public:local", activity)
+          end
+
+          if activity.data["type"] in ["Create"] do
+            object.data
+            |> Map.get("tag", [])
+            |> Enum.filter(fn tag -> is_bitstring(tag) end)
+            |> Enum.each(fn tag -> Pleroma.Web.Streamer.stream("hashtag:" <> tag, activity) end)
+
+            if object.data["attachment"] != [] do
+              Pleroma.Web.Streamer.stream("public:media", activity)
+
+              if activity.local do
+                Pleroma.Web.Streamer.stream("public:local:media", activity)
+              end
+            end
+          end
+        else
+          if get_visibility(activity) == "direct",
+            do: Pleroma.Web.Streamer.stream("direct", activity)
+        end
+      end
+    end
   end
 
   def create(%{to: to, actor: actor, context: context, object: object} = params, fake \\ false) do
diff --git a/lib/pleroma/web/mastodon_api/websocket_handler.ex b/lib/pleroma/web/mastodon_api/websocket_handler.ex
index 3c26eb406..dbd3542ea 100644
--- a/lib/pleroma/web/mastodon_api/websocket_handler.ex
+++ b/lib/pleroma/web/mastodon_api/websocket_handler.ex
@@ -8,7 +8,6 @@ defmodule Pleroma.Web.MastodonAPI.WebsocketHandler do
   alias Pleroma.Repo
   alias Pleroma.User
   alias Pleroma.Web.OAuth.Token
-  alias Pleroma.Web.Streamer
 
   @behaviour :cowboy_websocket
 
@@ -25,7 +24,7 @@ defmodule Pleroma.Web.MastodonAPI.WebsocketHandler do
   ]
   @anonymous_streams ["public", "public:local", "hashtag"]
 
-  # Handled by periodic keepalive in Pleroma.Web.Streamer.Ping.
+  # Handled by periodic keepalive in Pleroma.Web.Streamer.
   @timeout :infinity
 
   def init(%{qs: qs} = req, state) do
@@ -66,7 +65,7 @@ def websocket_info(:subscribe, state) do
       }, topic #{state.topic}"
     )
 
-    Streamer.add_socket(state.topic, streamer_socket(state))
+    Pleroma.Web.Streamer.add_socket(state.topic, streamer_socket(state))
     {:ok, state}
   end
 
@@ -81,7 +80,7 @@ def terminate(reason, _req, state) do
       }, topic #{state.topic || "?"}: #{inspect(reason)}"
     )
 
-    Streamer.remove_socket(state.topic, streamer_socket(state))
+    Pleroma.Web.Streamer.remove_socket(state.topic, streamer_socket(state))
     :ok
   end
 
diff --git a/lib/pleroma/web/streamer.ex b/lib/pleroma/web/streamer.ex
new file mode 100644
index 000000000..587c43f40
--- /dev/null
+++ b/lib/pleroma/web/streamer.ex
@@ -0,0 +1,318 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2019 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.Web.Streamer do
+  use GenServer
+  require Logger
+  alias Pleroma.Activity
+  alias Pleroma.Config
+  alias Pleroma.Conversation.Participation
+  alias Pleroma.Notification
+  alias Pleroma.Object
+  alias Pleroma.User
+  alias Pleroma.Web.ActivityPub.ActivityPub
+  alias Pleroma.Web.ActivityPub.Visibility
+  alias Pleroma.Web.CommonAPI
+  alias Pleroma.Web.MastodonAPI.NotificationView
+
+  @keepalive_interval :timer.seconds(30)
+
+  def start_link(_) do
+    GenServer.start_link(__MODULE__, %{}, name: __MODULE__)
+  end
+
+  def add_socket(topic, socket) do
+    GenServer.cast(__MODULE__, %{action: :add, socket: socket, topic: topic})
+  end
+
+  def remove_socket(topic, socket) do
+    GenServer.cast(__MODULE__, %{action: :remove, socket: socket, topic: topic})
+  end
+
+  def stream(topic, item) do
+    GenServer.cast(__MODULE__, %{action: :stream, topic: topic, item: item})
+  end
+
+  def init(args) do
+    Process.send_after(self(), %{action: :ping}, @keepalive_interval)
+
+    {:ok, args}
+  end
+
+  def handle_info(%{action: :ping}, topics) do
+    topics
+    |> Map.values()
+    |> List.flatten()
+    |> Enum.each(fn socket ->
+      Logger.debug("Sending keepalive ping")
+      send(socket.transport_pid, {:text, ""})
+    end)
+
+    Process.send_after(self(), %{action: :ping}, @keepalive_interval)
+
+    {:noreply, topics}
+  end
+
+  def handle_cast(%{action: :stream, topic: "direct", item: item}, topics) do
+    recipient_topics =
+      User.get_recipients_from_activity(item)
+      |> Enum.map(fn %{id: id} -> "direct:#{id}" end)
+
+    Enum.each(recipient_topics || [], fn user_topic ->
+      Logger.debug("Trying to push direct message to #{user_topic}\n\n")
+      push_to_socket(topics, user_topic, item)
+    end)
+
+    {:noreply, topics}
+  end
+
+  def handle_cast(%{action: :stream, topic: "participation", item: participation}, topics) do
+    user_topic = "direct:#{participation.user_id}"
+    Logger.debug("Trying to push a conversation participation to #{user_topic}\n\n")
+
+    push_to_socket(topics, user_topic, participation)
+
+    {:noreply, topics}
+  end
+
+  def handle_cast(%{action: :stream, topic: "list", item: item}, topics) do
+    # filter the recipient list if the activity is not public, see #270.
+    recipient_lists =
+      case Visibility.is_public?(item) do
+        true ->
+          Pleroma.List.get_lists_from_activity(item)
+
+        _ ->
+          Pleroma.List.get_lists_from_activity(item)
+          |> Enum.filter(fn list ->
+            owner = User.get_cached_by_id(list.user_id)
+
+            Visibility.visible_for_user?(item, owner)
+          end)
+      end
+
+    recipient_topics =
+      recipient_lists
+      |> Enum.map(fn %{id: id} -> "list:#{id}" end)
+
+    Enum.each(recipient_topics || [], fn list_topic ->
+      Logger.debug("Trying to push message to #{list_topic}\n\n")
+      push_to_socket(topics, list_topic, item)
+    end)
+
+    {:noreply, topics}
+  end
+
+  def handle_cast(
+        %{action: :stream, topic: topic, item: %Notification{} = item},
+        topics
+      )
+      when topic in ["user", "user:notification"] do
+    topics
+    |> Map.get("#{topic}:#{item.user_id}", [])
+    |> Enum.each(fn socket ->
+      with %User{} = user <- User.get_cached_by_ap_id(socket.assigns[:user].ap_id),
+           true <- should_send?(user, item) do
+        send(
+          socket.transport_pid,
+          {:text, represent_notification(socket.assigns[:user], item)}
+        )
+      end
+    end)
+
+    {:noreply, topics}
+  end
+
+  def handle_cast(%{action: :stream, topic: "user", item: item}, topics) do
+    Logger.debug("Trying to push to users")
+
+    recipient_topics =
+      User.get_recipients_from_activity(item)
+      |> Enum.map(fn %{id: id} -> "user:#{id}" end)
+
+    Enum.each(recipient_topics, fn topic ->
+      push_to_socket(topics, topic, item)
+    end)
+
+    {:noreply, topics}
+  end
+
+  def handle_cast(%{action: :stream, topic: topic, item: item}, topics) do
+    Logger.debug("Trying to push to #{topic}")
+    Logger.debug("Pushing item to #{topic}")
+    push_to_socket(topics, topic, item)
+    {:noreply, topics}
+  end
+
+  def handle_cast(%{action: :add, topic: topic, socket: socket}, sockets) do
+    topic = internal_topic(topic, socket)
+    sockets_for_topic = sockets[topic] || []
+    sockets_for_topic = Enum.uniq([socket | sockets_for_topic])
+    sockets = Map.put(sockets, topic, sockets_for_topic)
+    Logger.debug("Got new conn for #{topic}")
+    {:noreply, sockets}
+  end
+
+  def handle_cast(%{action: :remove, topic: topic, socket: socket}, sockets) do
+    topic = internal_topic(topic, socket)
+    sockets_for_topic = sockets[topic] || []
+    sockets_for_topic = List.delete(sockets_for_topic, socket)
+    sockets = Map.put(sockets, topic, sockets_for_topic)
+    Logger.debug("Removed conn for #{topic}")
+    {:noreply, sockets}
+  end
+
+  def handle_cast(m, state) do
+    Logger.info("Unknown: #{inspect(m)}, #{inspect(state)}")
+    {:noreply, state}
+  end
+
+  defp represent_update(%Activity{} = activity, %User{} = user) do
+    %{
+      event: "update",
+      payload:
+        Pleroma.Web.MastodonAPI.StatusView.render(
+          "status.json",
+          activity: activity,
+          for: user
+        )
+        |> Jason.encode!()
+    }
+    |> Jason.encode!()
+  end
+
+  defp represent_update(%Activity{} = activity) do
+    %{
+      event: "update",
+      payload:
+        Pleroma.Web.MastodonAPI.StatusView.render(
+          "status.json",
+          activity: activity
+        )
+        |> Jason.encode!()
+    }
+    |> Jason.encode!()
+  end
+
+  def represent_conversation(%Participation{} = participation) do
+    %{
+      event: "conversation",
+      payload:
+        Pleroma.Web.MastodonAPI.ConversationView.render("participation.json", %{
+          participation: participation,
+          for: participation.user
+        })
+        |> Jason.encode!()
+    }
+    |> Jason.encode!()
+  end
+
+  @spec represent_notification(User.t(), Notification.t()) :: binary()
+  defp represent_notification(%User{} = user, %Notification{} = notify) do
+    %{
+      event: "notification",
+      payload:
+        NotificationView.render(
+          "show.json",
+          %{notification: notify, for: user}
+        )
+        |> Jason.encode!()
+    }
+    |> Jason.encode!()
+  end
+
+  defp should_send?(%User{} = user, %Activity{} = item) do
+    blocks = user.info.blocks || []
+    mutes = user.info.mutes || []
+    reblog_mutes = user.info.muted_reblogs || []
+    domain_blocks = Pleroma.Web.ActivityPub.MRF.subdomains_regex(user.info.domain_blocks)
+
+    with parent when not is_nil(parent) <- Object.normalize(item),
+         true <- Enum.all?([blocks, mutes, reblog_mutes], &(item.actor not in &1)),
+         true <- Enum.all?([blocks, mutes], &(parent.data["actor"] not in &1)),
+         %{host: item_host} <- URI.parse(item.actor),
+         %{host: parent_host} <- URI.parse(parent.data["actor"]),
+         false <- Pleroma.Web.ActivityPub.MRF.subdomain_match?(domain_blocks, item_host),
+         false <- Pleroma.Web.ActivityPub.MRF.subdomain_match?(domain_blocks, parent_host),
+         true <- thread_containment(item, user),
+         false <- CommonAPI.thread_muted?(user, item) do
+      true
+    else
+      _ -> false
+    end
+  end
+
+  defp should_send?(%User{} = user, %Notification{activity: activity}) do
+    should_send?(user, activity)
+  end
+
+  def push_to_socket(topics, topic, %Activity{data: %{"type" => "Announce"}} = item) do
+    Enum.each(topics[topic] || [], fn socket ->
+      # Get the current user so we have up-to-date blocks etc.
+      if socket.assigns[:user] do
+        user = User.get_cached_by_ap_id(socket.assigns[:user].ap_id)
+
+        if should_send?(user, item) do
+          send(socket.transport_pid, {:text, represent_update(item, user)})
+        end
+      else
+        send(socket.transport_pid, {:text, represent_update(item)})
+      end
+    end)
+  end
+
+  def push_to_socket(topics, topic, %Participation{} = participation) do
+    Enum.each(topics[topic] || [], fn socket ->
+      send(socket.transport_pid, {:text, represent_conversation(participation)})
+    end)
+  end
+
+  def push_to_socket(topics, topic, %Activity{
+        data: %{"type" => "Delete", "deleted_activity_id" => deleted_activity_id}
+      }) do
+    Enum.each(topics[topic] || [], fn socket ->
+      send(
+        socket.transport_pid,
+        {:text, %{event: "delete", payload: to_string(deleted_activity_id)} |> Jason.encode!()}
+      )
+    end)
+  end
+
+  def push_to_socket(_topics, _topic, %Activity{data: %{"type" => "Delete"}}), do: :noop
+
+  def push_to_socket(topics, topic, item) do
+    Enum.each(topics[topic] || [], fn socket ->
+      # Get the current user so we have up-to-date blocks etc.
+      if socket.assigns[:user] do
+        user = User.get_cached_by_ap_id(socket.assigns[:user].ap_id)
+        blocks = user.info.blocks || []
+        mutes = user.info.mutes || []
+
+        with true <- Enum.all?([blocks, mutes], &(item.actor not in &1)),
+             true <- thread_containment(item, user) do
+          send(socket.transport_pid, {:text, represent_update(item, user)})
+        end
+      else
+        send(socket.transport_pid, {:text, represent_update(item)})
+      end
+    end)
+  end
+
+  defp internal_topic(topic, socket) when topic in ~w[user user:notification direct] do
+    "#{topic}:#{socket.assigns[:user].id}"
+  end
+
+  defp internal_topic(topic, _), do: topic
+
+  @spec thread_containment(Activity.t(), User.t()) :: boolean()
+  defp thread_containment(_activity, %User{info: %{skip_thread_containment: true}}), do: true
+
+  defp thread_containment(activity, user) do
+    if Config.get([:instance, :skip_thread_containment]) do
+      true
+    else
+      ActivityPub.contain_activity(activity, user)
+    end
+  end
+end
diff --git a/lib/pleroma/web/streamer/ping.ex b/lib/pleroma/web/streamer/ping.ex
deleted file mode 100644
index f77cbb95c..000000000
--- a/lib/pleroma/web/streamer/ping.ex
+++ /dev/null
@@ -1,33 +0,0 @@
-defmodule Pleroma.Web.Streamer.Ping do
-  use GenServer
-  require Logger
-
-  alias Pleroma.Web.Streamer.State
-  alias Pleroma.Web.Streamer.StreamerSocket
-
-  @keepalive_interval :timer.seconds(30)
-
-  def start_link(opts) do
-    ping_interval = Keyword.get(opts, :ping_interval, @keepalive_interval)
-    GenServer.start_link(__MODULE__, %{ping_interval: ping_interval}, name: __MODULE__)
-  end
-
-  def init(%{ping_interval: ping_interval} = args) do
-    Process.send_after(self(), :ping, ping_interval)
-    {:ok, args}
-  end
-
-  def handle_info(:ping, %{ping_interval: ping_interval} = state) do
-    State.get_sockets()
-    |> Map.values()
-    |> List.flatten()
-    |> Enum.each(fn %StreamerSocket{transport_pid: transport_pid} ->
-      Logger.debug("Sending keepalive ping")
-      send(transport_pid, {:text, ""})
-    end)
-
-    Process.send_after(self(), :ping, ping_interval)
-
-    {:noreply, state}
-  end
-end
diff --git a/lib/pleroma/web/streamer/state.ex b/lib/pleroma/web/streamer/state.ex
deleted file mode 100644
index 7b5199068..000000000
--- a/lib/pleroma/web/streamer/state.ex
+++ /dev/null
@@ -1,68 +0,0 @@
-defmodule Pleroma.Web.Streamer.State do
-  use GenServer
-  require Logger
-
-  alias Pleroma.Web.Streamer.StreamerSocket
-
-  def start_link(_) do
-    GenServer.start_link(__MODULE__, %{sockets: %{}}, name: __MODULE__)
-  end
-
-  def add_socket(topic, socket) do
-    GenServer.call(__MODULE__, {:add, socket, topic})
-  end
-
-  def remove_socket(topic, socket) do
-    GenServer.call(__MODULE__, {:remove, socket, topic})
-  end
-
-  def get_sockets do
-    %{sockets: stream_sockets} = GenServer.call(__MODULE__, :get_state)
-    stream_sockets
-  end
-
-  def init(init_arg) do
-    {:ok, init_arg}
-  end
-
-  def handle_call(:get_state, _from, state) do
-    {:reply, state, state}
-  end
-
-  def handle_call({:add, socket, topic}, _from, %{sockets: sockets} = state) do
-    internal_topic = internal_topic(topic, socket)
-    stream_socket = StreamerSocket.from_socket(socket)
-
-    sockets_for_topic =
-      sockets
-      |> Map.get(internal_topic, [])
-      |> List.insert_at(0, stream_socket)
-      |> Enum.uniq()
-
-    state = put_in(state, [:sockets, internal_topic], sockets_for_topic)
-    Logger.debug("Got new conn for #{topic}")
-    {:reply, state, state}
-  end
-
-  def handle_call({:remove, socket, topic}, _from, %{sockets: sockets} = state) do
-    internal_topic = internal_topic(topic, socket)
-    stream_socket = StreamerSocket.from_socket(socket)
-
-    sockets_for_topic =
-      sockets
-      |> Map.get(internal_topic, [])
-      |> List.delete(stream_socket)
-
-    state = Kernel.put_in(state, [:sockets, internal_topic], sockets_for_topic)
-    {:reply, state, state}
-  end
-
-  defp internal_topic(topic, socket)
-       when topic in ~w[user user:notification direct] do
-    "#{topic}:#{socket.assigns[:user].id}"
-  end
-
-  defp internal_topic(topic, _) do
-    topic
-  end
-end
diff --git a/lib/pleroma/web/streamer/streamer.ex b/lib/pleroma/web/streamer/streamer.ex
deleted file mode 100644
index 8cf719277..000000000
--- a/lib/pleroma/web/streamer/streamer.ex
+++ /dev/null
@@ -1,55 +0,0 @@
-# Pleroma: A lightweight social networking server
-# Copyright © 2017-2019 Pleroma Authors <https://pleroma.social/>
-# SPDX-License-Identifier: AGPL-3.0-only
-
-defmodule Pleroma.Web.Streamer do
-  alias Pleroma.Web.Streamer.State
-  alias Pleroma.Web.Streamer.Worker
-
-  @timeout 60_000
-  @mix_env Mix.env()
-
-  def add_socket(topic, socket) do
-    State.add_socket(topic, socket)
-  end
-
-  def remove_socket(topic, socket) do
-    State.remove_socket(topic, socket)
-  end
-
-  def get_sockets do
-    State.get_sockets()
-  end
-
-  def stream(topics, items) do
-    if should_send?() do
-      Task.async(fn ->
-        :poolboy.transaction(
-          :streamer_worker,
-          &Worker.stream(&1, topics, items),
-          @timeout
-        )
-      end)
-    end
-  end
-
-  def supervisor, do: Pleroma.Web.Streamer.Supervisor
-
-  defp should_send? do
-    handle_should_send(@mix_env)
-  end
-
-  defp handle_should_send(:test) do
-    case Process.whereis(:streamer_worker) do
-      nil ->
-        false
-
-      pid ->
-        Process.alive?(pid)
-    end
-  end
-
-  defp handle_should_send(_) do
-    true
-  end
-end
diff --git a/lib/pleroma/web/streamer/streamer_socket.ex b/lib/pleroma/web/streamer/streamer_socket.ex
deleted file mode 100644
index f006c0306..000000000
--- a/lib/pleroma/web/streamer/streamer_socket.ex
+++ /dev/null
@@ -1,31 +0,0 @@
-defmodule Pleroma.Web.Streamer.StreamerSocket do
-  defstruct transport_pid: nil, user: nil
-
-  alias Pleroma.User
-  alias Pleroma.Web.Streamer.StreamerSocket
-
-  def from_socket(%{
-        transport_pid: transport_pid,
-        assigns: %{user: nil}
-      }) do
-    %StreamerSocket{
-      transport_pid: transport_pid
-    }
-  end
-
-  def from_socket(%{
-        transport_pid: transport_pid,
-        assigns: %{user: %User{} = user}
-      }) do
-    %StreamerSocket{
-      transport_pid: transport_pid,
-      user: user
-    }
-  end
-
-  def from_socket(%{transport_pid: transport_pid}) do
-    %StreamerSocket{
-      transport_pid: transport_pid
-    }
-  end
-end
diff --git a/lib/pleroma/web/streamer/supervisor.ex b/lib/pleroma/web/streamer/supervisor.ex
deleted file mode 100644
index 6afe19323..000000000
--- a/lib/pleroma/web/streamer/supervisor.ex
+++ /dev/null
@@ -1,33 +0,0 @@
-defmodule Pleroma.Web.Streamer.Supervisor do
-  use Supervisor
-
-  def start_link(opts) do
-    Supervisor.start_link(__MODULE__, opts, name: __MODULE__)
-  end
-
-  def init(args) do
-    children = [
-      {Pleroma.Web.Streamer.State, args},
-      {Pleroma.Web.Streamer.Ping, args},
-      :poolboy.child_spec(:streamer_worker, poolboy_config())
-    ]
-
-    opts = [strategy: :one_for_one, name: Pleroma.Web.Streamer.Supervisor]
-    Supervisor.init(children, opts)
-  end
-
-  defp poolboy_config do
-    opts =
-      Pleroma.Config.get(:streamer,
-        workers: 3,
-        overflow_workers: 2
-      )
-
-    [
-      {:name, {:local, :streamer_worker}},
-      {:worker_module, Pleroma.Web.Streamer.Worker},
-      {:size, opts[:workers]},
-      {:max_overflow, opts[:overflow_workers]}
-    ]
-  end
-end
diff --git a/lib/pleroma/web/streamer/worker.ex b/lib/pleroma/web/streamer/worker.ex
deleted file mode 100644
index 5804508eb..000000000
--- a/lib/pleroma/web/streamer/worker.ex
+++ /dev/null
@@ -1,220 +0,0 @@
-defmodule Pleroma.Web.Streamer.Worker do
-  use GenServer
-
-  require Logger
-
-  alias Pleroma.Activity
-  alias Pleroma.Config
-  alias Pleroma.Conversation.Participation
-  alias Pleroma.Notification
-  alias Pleroma.Object
-  alias Pleroma.User
-  alias Pleroma.Web.ActivityPub.ActivityPub
-  alias Pleroma.Web.ActivityPub.Visibility
-  alias Pleroma.Web.CommonAPI
-  alias Pleroma.Web.Streamer.State
-  alias Pleroma.Web.Streamer.StreamerSocket
-  alias Pleroma.Web.StreamerView
-
-  def start_link(_) do
-    GenServer.start_link(__MODULE__, %{}, [])
-  end
-
-  def init(init_arg) do
-    {:ok, init_arg}
-  end
-
-  def stream(pid, topics, items) do
-    GenServer.call(pid, {:stream, topics, items})
-  end
-
-  def handle_call({:stream, topics, item}, _from, state) when is_list(topics) do
-    Enum.each(topics, fn t ->
-      do_stream(%{topic: t, item: item})
-    end)
-
-    {:reply, state, state}
-  end
-
-  def handle_call({:stream, topic, items}, _from, state) when is_list(items) do
-    Enum.each(items, fn i ->
-      do_stream(%{topic: topic, item: i})
-    end)
-
-    {:reply, state, state}
-  end
-
-  def handle_call({:stream, topic, item}, _from, state) do
-    do_stream(%{topic: topic, item: item})
-
-    {:reply, state, state}
-  end
-
-  defp do_stream(%{topic: "direct", item: item}) do
-    recipient_topics =
-      User.get_recipients_from_activity(item)
-      |> Enum.map(fn %{id: id} -> "direct:#{id}" end)
-
-    Enum.each(recipient_topics, fn user_topic ->
-      Logger.debug("Trying to push direct message to #{user_topic}\n\n")
-      push_to_socket(State.get_sockets(), user_topic, item)
-    end)
-  end
-
-  defp do_stream(%{topic: "participation", item: participation}) do
-    user_topic = "direct:#{participation.user_id}"
-    Logger.debug("Trying to push a conversation participation to #{user_topic}\n\n")
-
-    push_to_socket(State.get_sockets(), user_topic, participation)
-  end
-
-  defp do_stream(%{topic: "list", item: item}) do
-    # filter the recipient list if the activity is not public, see #270.
-    recipient_lists =
-      case Visibility.is_public?(item) do
-        true ->
-          Pleroma.List.get_lists_from_activity(item)
-
-        _ ->
-          Pleroma.List.get_lists_from_activity(item)
-          |> Enum.filter(fn list ->
-            owner = User.get_cached_by_id(list.user_id)
-
-            Visibility.visible_for_user?(item, owner)
-          end)
-      end
-
-    recipient_topics =
-      recipient_lists
-      |> Enum.map(fn %{id: id} -> "list:#{id}" end)
-
-    Enum.each(recipient_topics, fn list_topic ->
-      Logger.debug("Trying to push message to #{list_topic}\n\n")
-      push_to_socket(State.get_sockets(), list_topic, item)
-    end)
-  end
-
-  defp do_stream(%{topic: topic, item: %Notification{} = item})
-       when topic in ["user", "user:notification"] do
-    State.get_sockets()
-    |> Map.get("#{topic}:#{item.user_id}", [])
-    |> Enum.each(fn %StreamerSocket{transport_pid: transport_pid, user: socket_user} ->
-      with %User{} = user <- User.get_cached_by_ap_id(socket_user.ap_id),
-           true <- should_send?(user, item) do
-        send(transport_pid, {:text, StreamerView.render("notification.json", socket_user, item)})
-      end
-    end)
-  end
-
-  defp do_stream(%{topic: "user", item: item}) do
-    Logger.debug("Trying to push to users")
-
-    recipient_topics =
-      User.get_recipients_from_activity(item)
-      |> Enum.map(fn %{id: id} -> "user:#{id}" end)
-
-    Enum.each(recipient_topics, fn topic ->
-      push_to_socket(State.get_sockets(), topic, item)
-    end)
-  end
-
-  defp do_stream(%{topic: topic, item: item}) do
-    Logger.debug("Trying to push to #{topic}")
-    Logger.debug("Pushing item to #{topic}")
-    push_to_socket(State.get_sockets(), topic, item)
-  end
-
-  defp should_send?(%User{} = user, %Activity{} = item) do
-    blocks = user.info.blocks || []
-    mutes = user.info.mutes || []
-    reblog_mutes = user.info.muted_reblogs || []
-    domain_blocks = Pleroma.Web.ActivityPub.MRF.subdomains_regex(user.info.domain_blocks)
-
-    with parent when not is_nil(parent) <- Object.normalize(item),
-         true <- Enum.all?([blocks, mutes, reblog_mutes], &(item.actor not in &1)),
-         true <- Enum.all?([blocks, mutes], &(parent.data["actor"] not in &1)),
-         %{host: item_host} <- URI.parse(item.actor),
-         %{host: parent_host} <- URI.parse(parent.data["actor"]),
-         false <- Pleroma.Web.ActivityPub.MRF.subdomain_match?(domain_blocks, item_host),
-         false <- Pleroma.Web.ActivityPub.MRF.subdomain_match?(domain_blocks, parent_host),
-         true <- thread_containment(item, user),
-         false <- CommonAPI.thread_muted?(user, item) do
-      true
-    else
-      _ -> false
-    end
-  end
-
-  defp should_send?(%User{} = user, %Notification{activity: activity}) do
-    should_send?(user, activity)
-  end
-
-  def push_to_socket(topics, topic, %Activity{data: %{"type" => "Announce"}} = item) do
-    Enum.each(topics[topic] || [], fn %StreamerSocket{
-                                        transport_pid: transport_pid,
-                                        user: socket_user
-                                      } ->
-      # Get the current user so we have up-to-date blocks etc.
-      if socket_user do
-        user = User.get_cached_by_ap_id(socket_user.ap_id)
-
-        if should_send?(user, item) do
-          send(transport_pid, {:text, StreamerView.render("update.json", item, user)})
-        end
-      else
-        send(transport_pid, {:text, StreamerView.render("update.json", item)})
-      end
-    end)
-  end
-
-  def push_to_socket(topics, topic, %Participation{} = participation) do
-    Enum.each(topics[topic] || [], fn %StreamerSocket{transport_pid: transport_pid} ->
-      send(transport_pid, {:text, StreamerView.render("conversation.json", participation)})
-    end)
-  end
-
-  def push_to_socket(topics, topic, %Activity{
-        data: %{"type" => "Delete", "deleted_activity_id" => deleted_activity_id}
-      }) do
-    Enum.each(topics[topic] || [], fn %StreamerSocket{transport_pid: transport_pid} ->
-      send(
-        transport_pid,
-        {:text, %{event: "delete", payload: to_string(deleted_activity_id)} |> Jason.encode!()}
-      )
-    end)
-  end
-
-  def push_to_socket(_topics, _topic, %Activity{data: %{"type" => "Delete"}}), do: :noop
-
-  def push_to_socket(topics, topic, item) do
-    Enum.each(topics[topic] || [], fn %StreamerSocket{
-                                        transport_pid: transport_pid,
-                                        user: socket_user
-                                      } ->
-      # Get the current user so we have up-to-date blocks etc.
-      if socket_user do
-        user = User.get_cached_by_ap_id(socket_user.ap_id)
-        blocks = user.info.blocks || []
-        mutes = user.info.mutes || []
-
-        with true <- Enum.all?([blocks, mutes], &(item.actor not in &1)),
-             true <- thread_containment(item, user) do
-          send(transport_pid, {:text, StreamerView.render("update.json", item, user)})
-        end
-      else
-        send(transport_pid, {:text, StreamerView.render("update.json", item)})
-      end
-    end)
-  end
-
-  @spec thread_containment(Activity.t(), User.t()) :: boolean()
-  defp thread_containment(_activity, %User{info: %{skip_thread_containment: true}}), do: true
-
-  defp thread_containment(activity, user) do
-    if Config.get([:instance, :skip_thread_containment]) do
-      true
-    else
-      ActivityPub.contain_activity(activity, user)
-    end
-  end
-end
diff --git a/lib/pleroma/web/views/streamer_view.ex b/lib/pleroma/web/views/streamer_view.ex
deleted file mode 100644
index b13030fa0..000000000
--- a/lib/pleroma/web/views/streamer_view.ex
+++ /dev/null
@@ -1,66 +0,0 @@
-# Pleroma: A lightweight social networking server
-# Copyright © 2017-2019 Pleroma Authors <https://pleroma.social/>
-# SPDX-License-Identifier: AGPL-3.0-only
-
-defmodule Pleroma.Web.StreamerView do
-  use Pleroma.Web, :view
-
-  alias Pleroma.Activity
-  alias Pleroma.Conversation.Participation
-  alias Pleroma.Notification
-  alias Pleroma.User
-  alias Pleroma.Web.MastodonAPI.NotificationView
-
-  def render("update.json", %Activity{} = activity, %User{} = user) do
-    %{
-      event: "update",
-      payload:
-        Pleroma.Web.MastodonAPI.StatusView.render(
-          "status.json",
-          activity: activity,
-          for: user
-        )
-        |> Jason.encode!()
-    }
-    |> Jason.encode!()
-  end
-
-  def render("notification.json", %User{} = user, %Notification{} = notify) do
-    %{
-      event: "notification",
-      payload:
-        NotificationView.render(
-          "show.json",
-          %{notification: notify, for: user}
-        )
-        |> Jason.encode!()
-    }
-    |> Jason.encode!()
-  end
-
-  def render("update.json", %Activity{} = activity) do
-    %{
-      event: "update",
-      payload:
-        Pleroma.Web.MastodonAPI.StatusView.render(
-          "status.json",
-          activity: activity
-        )
-        |> Jason.encode!()
-    }
-    |> Jason.encode!()
-  end
-
-  def render("conversation.json", %Participation{} = participation) do
-    %{
-      event: "conversation",
-      payload:
-        Pleroma.Web.MastodonAPI.ConversationView.render("participation.json", %{
-          participation: participation,
-          for: participation.user
-        })
-        |> Jason.encode!()
-    }
-    |> Jason.encode!()
-  end
-end
diff --git a/mix.exs b/mix.exs
index 911ebad1d..f1e98585b 100644
--- a/mix.exs
+++ b/mix.exs
@@ -144,7 +144,6 @@ defp deps do
        git: "https://git.pleroma.social/pleroma/http_signatures.git",
        ref: "293d77bb6f4a67ac8bde1428735c3b42f22cbb30"},
       {:telemetry, "~> 0.3"},
-      {:poolboy, "~> 1.5"},
       {:prometheus_ex, "~> 3.0"},
       {:prometheus_plugs, "~> 1.1"},
       {:prometheus_phoenix, "~> 1.3"},
diff --git a/mix.lock b/mix.lock
index 0bf6a811e..41697dd5c 100644
--- a/mix.lock
+++ b/mix.lock
@@ -73,7 +73,6 @@
   "plug_crypto": {:hex, :plug_crypto, "1.0.0", "18e49317d3fa343f24620ed22795ec29d4a5e602d52d1513ccea0b07d8ea7d4d", [:mix], [], "hexpm"},
   "plug_static_index_html": {:hex, :plug_static_index_html, "1.0.0", "840123d4d3975585133485ea86af73cb2600afd7f2a976f9f5fd8b3808e636a0", [:mix], [{:plug, "~> 1.0", [hex: :plug, repo: "hexpm", optional: false]}], "hexpm"},
   "poison": {:hex, :poison, "3.1.0", "d9eb636610e096f86f25d9a46f35a9facac35609a7591b3be3326e99a0484665", [:mix], [], "hexpm"},
-  "poolboy": {:hex, :poolboy, "1.5.2", "392b007a1693a64540cead79830443abf5762f5d30cf50bc95cb2c1aaafa006b", [:rebar3], [], "hexpm"},
   "postgrex": {:hex, :postgrex, "0.14.3", "5754dee2fdf6e9e508cbf49ab138df964278700b764177e8f3871e658b345a1e", [:mix], [{:connection, "~> 1.0", [hex: :connection, repo: "hexpm", optional: false]}, {:db_connection, "~> 2.0", [hex: :db_connection, repo: "hexpm", optional: false]}, {:decimal, "~> 1.5", [hex: :decimal, repo: "hexpm", optional: false]}, {:jason, "~> 1.0", [hex: :jason, repo: "hexpm", optional: true]}], "hexpm"},
   "prometheus": {:hex, :prometheus, "4.4.1", "1e96073b3ed7788053768fea779cbc896ddc3bdd9ba60687f2ad50b252ac87d6", [:mix, :rebar3], [], "hexpm"},
   "prometheus_ecto": {:hex, :prometheus_ecto, "1.4.1", "6c768ea9654de871e5b32fab2eac348467b3021604ebebbcbd8bcbe806a65ed5", [:mix], [{:ecto, "~> 2.0 or ~> 3.0", [hex: :ecto, repo: "hexpm", optional: false]}, {:prometheus_ex, "~> 1.1 or ~> 2.0 or ~> 3.0", [hex: :prometheus_ex, repo: "hexpm", optional: false]}], "hexpm"},
diff --git a/test/activity/ir/topics_test.exs b/test/activity/ir/topics_test.exs
deleted file mode 100644
index e75f83586..000000000
--- a/test/activity/ir/topics_test.exs
+++ /dev/null
@@ -1,141 +0,0 @@
-defmodule Pleroma.Activity.Ir.TopicsTest do
-  use Pleroma.DataCase
-
-  alias Pleroma.Activity
-  alias Pleroma.Activity.Ir.Topics
-  alias Pleroma.Object
-
-  require Pleroma.Constants
-
-  describe "poll answer" do
-    test "produce no topics" do
-      activity = %Activity{object: %Object{data: %{"type" => "Answer"}}}
-
-      assert [] == Topics.get_activity_topics(activity)
-    end
-  end
-
-  describe "non poll answer" do
-    test "always add user and list topics" do
-      activity = %Activity{object: %Object{data: %{"type" => "FooBar"}}}
-      topics = Topics.get_activity_topics(activity)
-
-      assert Enum.member?(topics, "user")
-      assert Enum.member?(topics, "list")
-    end
-  end
-
-  describe "public visibility" do
-    setup do
-      activity = %Activity{
-        object: %Object{data: %{"type" => "Note"}},
-        data: %{"to" => [Pleroma.Constants.as_public()]}
-      }
-
-      {:ok, activity: activity}
-    end
-
-    test "produces public topic", %{activity: activity} do
-      topics = Topics.get_activity_topics(activity)
-
-      assert Enum.member?(topics, "public")
-    end
-
-    test "local action produces public:local topic", %{activity: activity} do
-      activity = %{activity | local: true}
-      topics = Topics.get_activity_topics(activity)
-
-      assert Enum.member?(topics, "public:local")
-    end
-
-    test "non-local action does not produce public:local topic", %{activity: activity} do
-      activity = %{activity | local: false}
-      topics = Topics.get_activity_topics(activity)
-
-      refute Enum.member?(topics, "public:local")
-    end
-  end
-
-  describe "public visibility create events" do
-    setup do
-      activity = %Activity{
-        object: %Object{data: %{"type" => "Create", "attachment" => []}},
-        data: %{"to" => [Pleroma.Constants.as_public()]}
-      }
-
-      {:ok, activity: activity}
-    end
-
-    test "with no attachments doesn't produce public:media topics", %{activity: activity} do
-      topics = Topics.get_activity_topics(activity)
-
-      refute Enum.member?(topics, "public:media")
-      refute Enum.member?(topics, "public:local:media")
-    end
-
-    test "converts tags to hash tags", %{activity: %{object: %{data: data} = object} = activity} do
-      tagged_data = Map.put(data, "tag", ["foo", "bar"])
-      activity = %{activity | object: %{object | data: tagged_data}}
-
-      topics = Topics.get_activity_topics(activity)
-
-      assert Enum.member?(topics, "hashtag:foo")
-      assert Enum.member?(topics, "hashtag:bar")
-    end
-
-    test "only converts strinngs to hash tags", %{
-      activity: %{object: %{data: data} = object} = activity
-    } do
-      tagged_data = Map.put(data, "tag", [2])
-      activity = %{activity | object: %{object | data: tagged_data}}
-
-      topics = Topics.get_activity_topics(activity)
-
-      refute Enum.member?(topics, "hashtag:2")
-    end
-  end
-
-  describe "public visibility create events with attachments" do
-    setup do
-      activity = %Activity{
-        object: %Object{data: %{"type" => "Create", "attachment" => ["foo"]}},
-        data: %{"to" => [Pleroma.Constants.as_public()]}
-      }
-
-      {:ok, activity: activity}
-    end
-
-    test "produce public:media topics", %{activity: activity} do
-      topics = Topics.get_activity_topics(activity)
-
-      assert Enum.member?(topics, "public:media")
-    end
-
-    test "local produces public:local:media topics", %{activity: activity} do
-      topics = Topics.get_activity_topics(activity)
-
-      assert Enum.member?(topics, "public:local:media")
-    end
-
-    test "non-local doesn't produce public:local:media topics", %{activity: activity} do
-      activity = %{activity | local: false}
-
-      topics = Topics.get_activity_topics(activity)
-
-      refute Enum.member?(topics, "public:local:media")
-    end
-  end
-
-  describe "non-public visibility" do
-    test "produces direct topic" do
-      activity = %Activity{object: %Object{data: %{"type" => "Note"}}, data: %{"to" => []}}
-      topics = Topics.get_activity_topics(activity)
-
-      assert Enum.member?(topics, "direct")
-      refute Enum.member?(topics, "public")
-      refute Enum.member?(topics, "public:local")
-      refute Enum.member?(topics, "public:media")
-      refute Enum.member?(topics, "public:local:media")
-    end
-  end
-end
diff --git a/test/integration/mastodon_websocket_test.exs b/test/integration/mastodon_websocket_test.exs
index c04262808..63bf73412 100644
--- a/test/integration/mastodon_websocket_test.exs
+++ b/test/integration/mastodon_websocket_test.exs
@@ -11,6 +11,7 @@ defmodule Pleroma.Integration.MastodonWebsocketTest do
   alias Pleroma.Integration.WebsocketClient
   alias Pleroma.Web.CommonAPI
   alias Pleroma.Web.OAuth
+  alias Pleroma.Web.Streamer
 
   @path Pleroma.Web.Endpoint.url()
         |> URI.parse()
@@ -18,6 +19,16 @@ defmodule Pleroma.Integration.MastodonWebsocketTest do
         |> Map.put(:path, "/api/v1/streaming")
         |> URI.to_string()
 
+  setup do
+    GenServer.start(Streamer, %{}, name: Streamer)
+
+    on_exit(fn ->
+      if pid = Process.whereis(Streamer) do
+        Process.exit(pid, :kill)
+      end
+    end)
+  end
+
   def start_socket(qs \\ nil, headers \\ []) do
     path =
       case qs do
@@ -42,14 +53,12 @@ test "requires authentication and a valid token for protected streams" do
     end)
   end
 
-  @tag needs_streamer: true
   test "allows public streams without authentication" do
     assert {:ok, _} = start_socket("?stream=public")
     assert {:ok, _} = start_socket("?stream=public:local")
     assert {:ok, _} = start_socket("?stream=hashtag&tag=lain")
   end
 
-  @tag needs_streamer: true
   test "receives well formatted events" do
     user = insert(:user)
     {:ok, _} = start_socket("?stream=public")
@@ -94,7 +103,6 @@ test "accepts valid tokens", state do
       assert {:ok, _} = start_socket("?stream=user&access_token=#{state.token.token}")
     end
 
-    @tag needs_streamer: true
     test "accepts the 'user' stream", %{token: token} = _state do
       assert {:ok, _} = start_socket("?stream=user&access_token=#{token.token}")
 
@@ -103,7 +111,6 @@ test "accepts the 'user' stream", %{token: token} = _state do
              end) =~ ":badarg"
     end
 
-    @tag needs_streamer: true
     test "accepts the 'user:notification' stream", %{token: token} = _state do
       assert {:ok, _} = start_socket("?stream=user:notification&access_token=#{token.token}")
 
@@ -112,7 +119,6 @@ test "accepts the 'user:notification' stream", %{token: token} = _state do
              end) =~ ":badarg"
     end
 
-    @tag needs_streamer: true
     test "accepts valid token on Sec-WebSocket-Protocol header", %{token: token} do
       assert {:ok, _} = start_socket("?stream=user", [{"Sec-WebSocket-Protocol", token.token}])
 
diff --git a/test/notification_test.exs b/test/notification_test.exs
index 3d2f9a8fc..3be9db09b 100644
--- a/test/notification_test.exs
+++ b/test/notification_test.exs
@@ -69,7 +69,16 @@ test "does not create a notification for subscribed users if status is a reply"
   end
 
   describe "create_notification" do
-    @tag needs_streamer: true
+    setup do
+      GenServer.start(Streamer, %{}, name: Streamer)
+
+      on_exit(fn ->
+        if pid = Process.whereis(Streamer) do
+          Process.exit(pid, :kill)
+        end
+      end)
+    end
+
     test "it creates a notification for user and send to the 'user' and the 'user:notification' stream" do
       user = insert(:user)
       task = Task.async(fn -> assert_receive {:text, _}, 4_000 end)
diff --git a/test/support/conn_case.ex b/test/support/conn_case.ex
index b39c70677..ec5892ff5 100644
--- a/test/support/conn_case.ex
+++ b/test/support/conn_case.ex
@@ -40,10 +40,6 @@ defmodule Pleroma.Web.ConnCase do
       Ecto.Adapters.SQL.Sandbox.mode(Pleroma.Repo, {:shared, self()})
     end
 
-    if tags[:needs_streamer] do
-      start_supervised(Pleroma.Web.Streamer.supervisor())
-    end
-
     {:ok, conn: Phoenix.ConnTest.build_conn()}
   end
 end
diff --git a/test/support/data_case.ex b/test/support/data_case.ex
index 17fa15214..f3d98e7e3 100644
--- a/test/support/data_case.ex
+++ b/test/support/data_case.ex
@@ -39,10 +39,6 @@ defmodule Pleroma.DataCase do
       Ecto.Adapters.SQL.Sandbox.mode(Pleroma.Repo, {:shared, self()})
     end
 
-    if tags[:needs_streamer] do
-      start_supervised(Pleroma.Web.Streamer.supervisor())
-    end
-
     :ok
   end
 
diff --git a/test/web/activity_pub/activity_pub_test.exs b/test/web/activity_pub/activity_pub_test.exs
index 4100108a5..d0118fefa 100644
--- a/test/web/activity_pub/activity_pub_test.exs
+++ b/test/web/activity_pub/activity_pub_test.exs
@@ -38,7 +38,9 @@ test "it streams them out" do
         stream: fn _, _ -> nil end do
         ActivityPub.stream_out_participations(conversation.participations)
 
-        assert called(Pleroma.Web.Streamer.stream("participation", participations))
+        Enum.each(participations, fn participation ->
+          assert called(Pleroma.Web.Streamer.stream("participation", participation))
+        end)
       end
     end
   end
diff --git a/test/web/streamer/ping_test.exs b/test/web/streamer/ping_test.exs
deleted file mode 100644
index 3d52c00e4..000000000
--- a/test/web/streamer/ping_test.exs
+++ /dev/null
@@ -1,36 +0,0 @@
-# Pleroma: A lightweight social networking server
-# Copyright © 2017-2019 Pleroma Authors <https://pleroma.social/>
-# SPDX-License-Identifier: AGPL-3.0-only
-
-defmodule Pleroma.Web.PingTest do
-  use Pleroma.DataCase
-
-  import Pleroma.Factory
-  alias Pleroma.Web.Streamer
-
-  setup do
-    start_supervised({Streamer.supervisor(), [ping_interval: 30]})
-
-    :ok
-  end
-
-  describe "sockets" do
-    setup do
-      user = insert(:user)
-      {:ok, %{user: user}}
-    end
-
-    test "it sends pings", %{user: user} do
-      task =
-        Task.async(fn ->
-          assert_receive {:text, received_event}, 40
-          assert_receive {:text, received_event}, 40
-          assert_receive {:text, received_event}, 40
-        end)
-
-      Streamer.add_socket("public", %{transport_pid: task.pid, assigns: %{user: user}})
-
-      Task.await(task)
-    end
-  end
-end
diff --git a/test/web/streamer/state_test.exs b/test/web/streamer/state_test.exs
deleted file mode 100644
index d1aeac541..000000000
--- a/test/web/streamer/state_test.exs
+++ /dev/null
@@ -1,54 +0,0 @@
-# Pleroma: A lightweight social networking server
-# Copyright © 2017-2019 Pleroma Authors <https://pleroma.social/>
-# SPDX-License-Identifier: AGPL-3.0-only
-
-defmodule Pleroma.Web.StateTest do
-  use Pleroma.DataCase
-
-  import Pleroma.Factory
-  alias Pleroma.Web.Streamer
-  alias Pleroma.Web.Streamer.StreamerSocket
-
-  @moduletag needs_streamer: true
-
-  describe "sockets" do
-    setup do
-      user = insert(:user)
-      user2 = insert(:user)
-      {:ok, %{user: user, user2: user2}}
-    end
-
-    test "it can add a socket", %{user: user} do
-      Streamer.add_socket("public", %{transport_pid: 1, assigns: %{user: user}})
-
-      assert(%{"public" => [%StreamerSocket{transport_pid: 1}]} = Streamer.get_sockets())
-    end
-
-    test "it can add multiple sockets per user", %{user: user} do
-      Streamer.add_socket("public", %{transport_pid: 1, assigns: %{user: user}})
-      Streamer.add_socket("public", %{transport_pid: 2, assigns: %{user: user}})
-
-      assert(
-        %{
-          "public" => [
-            %StreamerSocket{transport_pid: 2},
-            %StreamerSocket{transport_pid: 1}
-          ]
-        } = Streamer.get_sockets()
-      )
-    end
-
-    test "it will not add a duplicate socket", %{user: user} do
-      Streamer.add_socket("activity", %{transport_pid: 1, assigns: %{user: user}})
-      Streamer.add_socket("activity", %{transport_pid: 1, assigns: %{user: user}})
-
-      assert(
-        %{
-          "activity" => [
-            %StreamerSocket{transport_pid: 1}
-          ]
-        } = Streamer.get_sockets()
-      )
-    end
-  end
-end
diff --git a/test/web/streamer/streamer_test.exs b/test/web/streamer_test.exs
similarity index 86%
rename from test/web/streamer/streamer_test.exs
rename to test/web/streamer_test.exs
index 88847e20f..96fa7645f 100644
--- a/test/web/streamer/streamer_test.exs
+++ b/test/web/streamer_test.exs
@@ -5,20 +5,24 @@
 defmodule Pleroma.Web.StreamerTest do
   use Pleroma.DataCase
 
-  import Pleroma.Factory
-
   alias Pleroma.List
   alias Pleroma.User
   alias Pleroma.Web.CommonAPI
   alias Pleroma.Web.Streamer
-  alias Pleroma.Web.Streamer.StreamerSocket
-  alias Pleroma.Web.Streamer.Worker
+  import Pleroma.Factory
 
-  @moduletag needs_streamer: true
   clear_config_all([:instance, :skip_thread_containment])
 
   describe "user streams" do
     setup do
+      GenServer.start(Streamer, %{}, name: Streamer)
+
+      on_exit(fn ->
+        if pid = Process.whereis(Streamer) do
+          Process.exit(pid, :kill)
+        end
+      end)
+
       user = insert(:user)
       notify = insert(:notification, user: user, activity: build(:note_activity))
       {:ok, %{user: user, notify: notify}}
@@ -121,9 +125,11 @@ test "it sends to public" do
         assert_receive {:text, _}, 4_000
       end)
 
-    fake_socket = %StreamerSocket{
+    fake_socket = %{
       transport_pid: task.pid,
-      user: user
+      assigns: %{
+        user: user
+      }
     }
 
     {:ok, activity} = CommonAPI.post(other_user, %{"status" => "Test"})
@@ -132,7 +138,7 @@ test "it sends to public" do
       "public" => [fake_socket]
     }
 
-    Worker.push_to_socket(topics, "public", activity)
+    Streamer.push_to_socket(topics, "public", activity)
 
     Task.await(task)
 
@@ -149,9 +155,11 @@ test "it sends to public" do
         assert received_event == expected_event
       end)
 
-    fake_socket = %StreamerSocket{
+    fake_socket = %{
       transport_pid: task.pid,
-      user: user
+      assigns: %{
+        user: user
+      }
     }
 
     {:ok, activity} = CommonAPI.delete(activity.id, other_user)
@@ -160,7 +168,7 @@ test "it sends to public" do
       "public" => [fake_socket]
     }
 
-    Worker.push_to_socket(topics, "public", activity)
+    Streamer.push_to_socket(topics, "public", activity)
 
     Task.await(task)
   end
@@ -181,9 +189,9 @@ test "it doesn't send to user if recipients invalid and thread containment is en
         )
 
       task = Task.async(fn -> refute_receive {:text, _}, 1_000 end)
-      fake_socket = %StreamerSocket{transport_pid: task.pid, user: user}
+      fake_socket = %{transport_pid: task.pid, assigns: %{user: user}}
       topics = %{"public" => [fake_socket]}
-      Worker.push_to_socket(topics, "public", activity)
+      Streamer.push_to_socket(topics, "public", activity)
 
       Task.await(task)
     end
@@ -203,9 +211,9 @@ test "it sends message if recipients invalid and thread containment is disabled"
         )
 
       task = Task.async(fn -> assert_receive {:text, _}, 1_000 end)
-      fake_socket = %StreamerSocket{transport_pid: task.pid, user: user}
+      fake_socket = %{transport_pid: task.pid, assigns: %{user: user}}
       topics = %{"public" => [fake_socket]}
-      Worker.push_to_socket(topics, "public", activity)
+      Streamer.push_to_socket(topics, "public", activity)
 
       Task.await(task)
     end
@@ -225,9 +233,9 @@ test "it sends message if recipients invalid and thread containment is enabled b
         )
 
       task = Task.async(fn -> assert_receive {:text, _}, 1_000 end)
-      fake_socket = %StreamerSocket{transport_pid: task.pid, user: user}
+      fake_socket = %{transport_pid: task.pid, assigns: %{user: user}}
       topics = %{"public" => [fake_socket]}
-      Worker.push_to_socket(topics, "public", activity)
+      Streamer.push_to_socket(topics, "public", activity)
 
       Task.await(task)
     end
@@ -243,9 +251,11 @@ test "it doesn't send to blocked users" do
         refute_receive {:text, _}, 1_000
       end)
 
-    fake_socket = %StreamerSocket{
+    fake_socket = %{
       transport_pid: task.pid,
-      user: user
+      assigns: %{
+        user: user
+      }
     }
 
     {:ok, activity} = CommonAPI.post(blocked_user, %{"status" => "Test"})
@@ -254,7 +264,7 @@ test "it doesn't send to blocked users" do
       "public" => [fake_socket]
     }
 
-    Worker.push_to_socket(topics, "public", activity)
+    Streamer.push_to_socket(topics, "public", activity)
 
     Task.await(task)
   end
@@ -274,9 +284,11 @@ test "it doesn't send unwanted DMs to list" do
         refute_receive {:text, _}, 1_000
       end)
 
-    fake_socket = %StreamerSocket{
+    fake_socket = %{
       transport_pid: task.pid,
-      user: user_a
+      assigns: %{
+        user: user_a
+      }
     }
 
     {:ok, activity} =
@@ -289,7 +301,7 @@ test "it doesn't send unwanted DMs to list" do
       "list:#{list.id}" => [fake_socket]
     }
 
-    Worker.handle_call({:stream, "list", activity}, self(), topics)
+    Streamer.handle_cast(%{action: :stream, topic: "list", item: activity}, topics)
 
     Task.await(task)
   end
@@ -306,9 +318,11 @@ test "it doesn't send unwanted private posts to list" do
         refute_receive {:text, _}, 1_000
       end)
 
-    fake_socket = %StreamerSocket{
+    fake_socket = %{
       transport_pid: task.pid,
-      user: user_a
+      assigns: %{
+        user: user_a
+      }
     }
 
     {:ok, activity} =
@@ -321,12 +335,12 @@ test "it doesn't send unwanted private posts to list" do
       "list:#{list.id}" => [fake_socket]
     }
 
-    Worker.handle_call({:stream, "list", activity}, self(), topics)
+    Streamer.handle_cast(%{action: :stream, topic: "list", item: activity}, topics)
 
     Task.await(task)
   end
 
-  test "it sends wanted private posts to list" do
+  test "it send wanted private posts to list" do
     user_a = insert(:user)
     user_b = insert(:user)
 
@@ -340,9 +354,11 @@ test "it sends wanted private posts to list" do
         assert_receive {:text, _}, 1_000
       end)
 
-    fake_socket = %StreamerSocket{
+    fake_socket = %{
       transport_pid: task.pid,
-      user: user_a
+      assigns: %{
+        user: user_a
+      }
     }
 
     {:ok, activity} =
@@ -351,12 +367,11 @@ test "it sends wanted private posts to list" do
         "visibility" => "private"
       })
 
-    Streamer.add_socket(
-      "list:#{list.id}",
-      fake_socket
-    )
+    topics = %{
+      "list:#{list.id}" => [fake_socket]
+    }
 
-    Worker.handle_call({:stream, "list", activity}, self(), %{})
+    Streamer.handle_cast(%{action: :stream, topic: "list", item: activity}, topics)
 
     Task.await(task)
   end
@@ -372,9 +387,11 @@ test "it doesn't send muted reblogs" do
         refute_receive {:text, _}, 1_000
       end)
 
-    fake_socket = %StreamerSocket{
+    fake_socket = %{
       transport_pid: task.pid,
-      user: user1
+      assigns: %{
+        user: user1
+      }
     }
 
     {:ok, create_activity} = CommonAPI.post(user3, %{"status" => "I'm kawen"})
@@ -384,7 +401,7 @@ test "it doesn't send muted reblogs" do
       "public" => [fake_socket]
     }
 
-    Worker.push_to_socket(topics, "public", announce_activity)
+    Streamer.push_to_socket(topics, "public", announce_activity)
 
     Task.await(task)
   end
@@ -400,8 +417,6 @@ test "it doesn't send posts from muted threads" do
 
     task = Task.async(fn -> refute_receive {:text, _}, 4_000 end)
 
-    Process.sleep(4000)
-
     Streamer.add_socket(
       "user",
       %{transport_pid: task.pid, assigns: %{user: user2}}
@@ -413,6 +428,14 @@ test "it doesn't send posts from muted threads" do
 
   describe "direct streams" do
     setup do
+      GenServer.start(Streamer, %{}, name: Streamer)
+
+      on_exit(fn ->
+        if pid = Process.whereis(Streamer) do
+          Process.exit(pid, :kill)
+        end
+      end)
+
       :ok
     end
 
@@ -457,8 +480,6 @@ test "it doesn't send conversation update to the 'direct' streamj when the last
           refute_receive {:text, _}, 4_000
         end)
 
-      Process.sleep(1000)
-
       Streamer.add_socket(
         "direct",
         %{transport_pid: task.pid, assigns: %{user: user}}
@@ -500,8 +521,6 @@ test "it sends conversation update to the 'direct' stream when a message is dele
           assert last_status["id"] == to_string(create_activity.id)
         end)
 
-      Process.sleep(1000)
-
       Streamer.add_socket(
         "direct",
         %{transport_pid: task.pid, assigns: %{user: user}}