diff --git a/config/test.exs b/config/test.exs
index 7cc669c19..bce9dd4aa 100644
--- a/config/test.exs
+++ b/config/test.exs
@@ -90,7 +90,7 @@
 
 config :pleroma, :modules, runtime_dir: "test/fixtures/modules"
 
-config :pleroma, Pleroma.Gun.API, Pleroma.Gun.API.Mock
+config :pleroma, Pleroma.Gun, Pleroma.GunMock
 
 config :pleroma, Pleroma.Emails.NewUsersDigestEmail, enabled: true
 
diff --git a/lib/pleroma/gun/api.ex b/lib/pleroma/gun/api.ex
index f79c9f443..76aac5874 100644
--- a/lib/pleroma/gun/api.ex
+++ b/lib/pleroma/gun/api.ex
@@ -3,27 +3,43 @@
 # SPDX-License-Identifier: AGPL-3.0-only
 
 defmodule Pleroma.Gun.API do
-  @callback open(charlist(), pos_integer(), map()) :: {:ok, pid()}
-  @callback info(pid()) :: map()
-  @callback close(pid()) :: :ok
-  @callback await_up(pid, pos_integer()) :: {:ok, atom()} | {:error, atom()}
-  @callback connect(pid(), map()) :: reference()
-  @callback await(pid(), reference()) :: {:response, :fin, 200, []}
-  @callback set_owner(pid(), pid()) :: :ok
+  @behaviour Pleroma.Gun
 
-  def open(host, port, opts), do: api().open(host, port, opts)
+  alias Pleroma.Gun
 
-  def info(pid), do: api().info(pid)
+  @gun_keys [
+    :connect_timeout,
+    :http_opts,
+    :http2_opts,
+    :protocols,
+    :retry,
+    :retry_timeout,
+    :trace,
+    :transport,
+    :tls_opts,
+    :tcp_opts,
+    :socks_opts,
+    :ws_opts
+  ]
 
-  def close(pid), do: api().close(pid)
+  @impl Gun
+  def open(host, port, opts \\ %{}), do: :gun.open(host, port, Map.take(opts, @gun_keys))
 
-  def await_up(pid, timeout \\ 5_000), do: api().await_up(pid, timeout)
+  @impl Gun
+  defdelegate info(pid), to: :gun
 
-  def connect(pid, opts), do: api().connect(pid, opts)
+  @impl Gun
+  defdelegate close(pid), to: :gun
 
-  def await(pid, ref), do: api().await(pid, ref)
+  @impl Gun
+  defdelegate await_up(pid, timeout \\ 5_000), to: :gun
 
-  def set_owner(pid, owner), do: api().set_owner(pid, owner)
+  @impl Gun
+  defdelegate connect(pid, opts), to: :gun
 
-  defp api, do: Pleroma.Config.get([Pleroma.Gun.API], Pleroma.Gun)
+  @impl Gun
+  defdelegate await(pid, ref), to: :gun
+
+  @impl Gun
+  defdelegate set_owner(pid, owner), to: :gun
 end
diff --git a/lib/pleroma/gun/conn.ex b/lib/pleroma/gun/conn.ex
index d73bec360..319718690 100644
--- a/lib/pleroma/gun/conn.ex
+++ b/lib/pleroma/gun/conn.ex
@@ -6,7 +6,7 @@ defmodule Pleroma.Gun.Conn do
   @moduledoc """
   Struct for gun connection data
   """
-  alias Pleroma.Gun.API
+  alias Pleroma.Gun
   alias Pleroma.Pool.Connections
 
   require Logger
@@ -65,7 +65,7 @@ def open(%URI{} = uri, name, opts) do
         last_reference: :os.system_time(:second)
       }
 
-      :ok = API.set_owner(conn_pid, Process.whereis(name))
+      :ok = Gun.set_owner(conn_pid, Process.whereis(name))
       Connections.add_conn(name, key, conn)
     end
   end
@@ -77,10 +77,10 @@ defp do_open(uri, %{proxy: {proxy_host, proxy_port}} = opts) do
       |> add_http2_opts(uri.scheme, Map.get(opts, :tls_opts, []))
 
     with open_opts <- Map.delete(opts, :tls_opts),
-         {:ok, conn} <- API.open(proxy_host, proxy_port, open_opts),
-         {:ok, _} <- API.await_up(conn, opts[:await_up_timeout]),
-         stream <- API.connect(conn, connect_opts),
-         {:response, :fin, 200, _} <- API.await(conn, stream) do
+         {:ok, conn} <- Gun.open(proxy_host, proxy_port, open_opts),
+         {:ok, _} <- Gun.await_up(conn, opts[:await_up_timeout]),
+         stream <- Gun.connect(conn, connect_opts),
+         {:response, :fin, 200, _} <- Gun.await(conn, stream) do
       conn
     else
       error ->
@@ -115,8 +115,8 @@ defp do_open(uri, %{proxy: {proxy_type, proxy_host, proxy_port}} = opts) do
       |> Map.put(:protocols, [:socks])
       |> Map.put(:socks_opts, socks_opts)
 
-    with {:ok, conn} <- API.open(proxy_host, proxy_port, opts),
-         {:ok, _} <- API.await_up(conn, opts[:await_up_timeout]) do
+    with {:ok, conn} <- Gun.open(proxy_host, proxy_port, opts),
+         {:ok, _} <- Gun.await_up(conn, opts[:await_up_timeout]) do
       conn
     else
       error ->
@@ -133,8 +133,8 @@ defp do_open(uri, %{proxy: {proxy_type, proxy_host, proxy_port}} = opts) do
   defp do_open(%URI{host: host, port: port} = uri, opts) do
     host = Pleroma.HTTP.Connection.parse_host(host)
 
-    with {:ok, conn} <- API.open(host, port, opts),
-         {:ok, _} <- API.await_up(conn, opts[:await_up_timeout]) do
+    with {:ok, conn} <- Gun.open(host, port, opts),
+         {:ok, _} <- Gun.await_up(conn, opts[:await_up_timeout]) do
       conn
     else
       error ->
@@ -164,7 +164,7 @@ defp close_least_used_and_do_open(name, uri, opts) do
 
     with [{close_key, least_used} | _conns] <-
            Connections.get_unused_conns(name),
-         :ok <- Pleroma.Gun.API.close(least_used.conn) do
+         :ok <- Gun.close(least_used.conn) do
       Connections.remove_conn(name, close_key)
 
       do_open(uri, opts)
diff --git a/lib/pleroma/gun/gun.ex b/lib/pleroma/gun/gun.ex
index da82983b1..35390bb11 100644
--- a/lib/pleroma/gun/gun.ex
+++ b/lib/pleroma/gun/gun.ex
@@ -3,46 +3,27 @@
 # SPDX-License-Identifier: AGPL-3.0-only
 
 defmodule Pleroma.Gun do
-  @behaviour Pleroma.Gun.API
+  @callback open(charlist(), pos_integer(), map()) :: {:ok, pid()}
+  @callback info(pid()) :: map()
+  @callback close(pid()) :: :ok
+  @callback await_up(pid, pos_integer()) :: {:ok, atom()} | {:error, atom()}
+  @callback connect(pid(), map()) :: reference()
+  @callback await(pid(), reference()) :: {:response, :fin, 200, []}
+  @callback set_owner(pid(), pid()) :: :ok
 
-  alias Pleroma.Gun.API
+  def open(host, port, opts), do: api().open(host, port, opts)
 
-  @gun_keys [
-    :connect_timeout,
-    :http_opts,
-    :http2_opts,
-    :protocols,
-    :retry,
-    :retry_timeout,
-    :trace,
-    :transport,
-    :tls_opts,
-    :tcp_opts,
-    :socks_opts,
-    :ws_opts
-  ]
+  def info(pid), do: api().info(pid)
 
-  @impl API
-  def open(host, port, opts \\ %{}), do: :gun.open(host, port, Map.take(opts, @gun_keys))
+  def close(pid), do: api().close(pid)
 
-  @impl API
-  defdelegate info(pid), to: :gun
+  def await_up(pid, timeout \\ 5_000), do: api().await_up(pid, timeout)
 
-  @impl API
-  defdelegate close(pid), to: :gun
+  def connect(pid, opts), do: api().connect(pid, opts)
 
-  @impl API
-  defdelegate await_up(pid, timeout \\ 5_000), to: :gun
+  def await(pid, ref), do: api().await(pid, ref)
 
-  @impl API
-  defdelegate connect(pid, opts), to: :gun
+  def set_owner(pid, owner), do: api().set_owner(pid, owner)
 
-  @impl API
-  defdelegate await(pid, ref), to: :gun
-
-  @spec flush(pid() | reference()) :: :ok
-  defdelegate flush(pid), to: :gun
-
-  @impl API
-  defdelegate set_owner(pid, owner), to: :gun
+  defp api, do: Pleroma.Config.get([Pleroma.Gun], Pleroma.Gun.API)
 end
diff --git a/lib/pleroma/pool/connections.ex b/lib/pleroma/pool/connections.ex
index 0f7a1bfd8..92179fbfc 100644
--- a/lib/pleroma/pool/connections.ex
+++ b/lib/pleroma/pool/connections.ex
@@ -19,7 +19,7 @@ defmodule Pleroma.Pool.Connections do
 
   defstruct conns: %{}, opts: []
 
-  alias Pleroma.Gun.API
+  alias Pleroma.Gun
 
   @spec start_link({atom(), keyword()}) :: {:ok, pid()}
   def start_link({name, opts}) do
@@ -209,7 +209,7 @@ def handle_info({:gun_up, conn_pid, _protocol}, state) do
         nil ->
           Logger.debug(":gun_up message for conn which is not found in state")
 
-          :ok = API.close(conn_pid)
+          :ok = Gun.close(conn_pid)
 
           state
       end
@@ -226,7 +226,7 @@ def handle_info({:gun_down, conn_pid, _protocol, _reason, _killed}, state) do
            {true, key} <- {Process.alive?(conn_pid), key} do
         if conn.retries == retries do
           Logger.debug("closing conn if retries is eq  #{inspect(conn_pid)}")
-          :ok = API.close(conn.conn)
+          :ok = Gun.close(conn.conn)
 
           put_in(
             state.conns,
@@ -252,7 +252,7 @@ def handle_info({:gun_down, conn_pid, _protocol, _reason, _killed}, state) do
         nil ->
           Logger.debug(":gun_down message for conn which is not found in state")
 
-          :ok = API.close(conn_pid)
+          :ok = Gun.close(conn_pid)
 
           state
       end
@@ -287,7 +287,7 @@ def handle_info({:DOWN, _ref, :process, conn_pid, reason}, state) do
   defp compose_key_gun_info(pid) do
     try do
       # sometimes :gun.info can raise MatchError, which lead to pool terminate
-      %{origin_host: origin_host, origin_scheme: scheme, origin_port: port} = API.info(pid)
+      %{origin_host: origin_host, origin_scheme: scheme, origin_port: port} = Gun.info(pid)
 
       host =
         case :inet.ntoa(origin_host) do
diff --git a/test/http/adapter_helper/gun_test.exs b/test/http/adapter_helper/gun_test.exs
index bc7e3f0e0..66ca416d9 100644
--- a/test/http/adapter_helper/gun_test.exs
+++ b/test/http/adapter_helper/gun_test.exs
@@ -12,7 +12,7 @@ defmodule Pleroma.HTTP.AdapterHelper.GunTest do
   alias Pleroma.Pool.Connections
 
   setup_all do
-    {:ok, _} = Registry.start_link(keys: :unique, name: Pleroma.Gun.API.Mock)
+    {:ok, _} = Registry.start_link(keys: :unique, name: Pleroma.GunMock)
     :ok
   end
 
diff --git a/test/http/connection_test.exs b/test/http/connection_test.exs
index 37de11e7a..3f32898cb 100644
--- a/test/http/connection_test.exs
+++ b/test/http/connection_test.exs
@@ -10,7 +10,7 @@ defmodule Pleroma.HTTP.ConnectionTest do
   alias Pleroma.HTTP.Connection
 
   setup_all do
-    {:ok, _} = Registry.start_link(keys: :unique, name: Pleroma.Gun.API.Mock)
+    {:ok, _} = Registry.start_link(keys: :unique, name: Pleroma.GunMock)
     :ok
   end
 
diff --git a/test/http_test.exs b/test/http_test.exs
index 83c27f6e1..d45d34f32 100644
--- a/test/http_test.exs
+++ b/test/http_test.exs
@@ -61,8 +61,8 @@ test "returns successfully result" do
 
   describe "connection pools" do
     @describetag :integration
-    clear_config(Pleroma.Gun.API) do
-      Pleroma.Config.put(Pleroma.Gun.API, Pleroma.Gun)
+    clear_config(Pleroma.Gun) do
+      Pleroma.Config.put(Pleroma.Gun, Pleroma.Gun.API)
     end
 
     test "gun" do
diff --git a/test/pool/connections_test.exs b/test/pool/connections_test.exs
index a084f31b9..31dd5f6fa 100644
--- a/test/pool/connections_test.exs
+++ b/test/pool/connections_test.exs
@@ -6,12 +6,11 @@ defmodule Pleroma.Pool.ConnectionsTest do
   use ExUnit.Case
   use Pleroma.Tests.Helpers
   import ExUnit.CaptureLog
-  alias Pleroma.Gun.API
   alias Pleroma.Gun.Conn
   alias Pleroma.Pool.Connections
 
   setup_all do
-    {:ok, _} = Registry.start_link(keys: :unique, name: API.Mock)
+    {:ok, _} = Registry.start_link(keys: :unique, name: Pleroma.GunMock)
     :ok
   end
 
@@ -439,8 +438,8 @@ test "remove frequently used and idle", %{name: name} do
   describe "integration test" do
     @describetag :integration
 
-    clear_config(API) do
-      Pleroma.Config.put(API, Pleroma.Gun)
+    clear_config(Pleroma.Gun) do
+      Pleroma.Config.put(Pleroma.Gun, Pleroma.Gun.API)
     end
 
     test "opens connection and change owner", %{name: name} do
diff --git a/test/reverse_proxy/client/tesla_test.exs b/test/reverse_proxy/client/tesla_test.exs
index 231271b0d..78bd31530 100644
--- a/test/reverse_proxy/client/tesla_test.exs
+++ b/test/reverse_proxy/client/tesla_test.exs
@@ -8,8 +8,8 @@ defmodule Pleroma.ReverseProxy.Client.TeslaTest do
   alias Pleroma.ReverseProxy.Client
   @moduletag :integration
 
-  clear_config_all(Pleroma.Gun.API) do
-    Pleroma.Config.put(Pleroma.Gun.API, Pleroma.Gun)
+  clear_config_all(Pleroma.Gun) do
+    Pleroma.Config.put(Pleroma.Gun, Pleroma.Gun.API)
   end
 
   setup do
diff --git a/test/reverse_proxy/reverse_proxy_test.exs b/test/reverse_proxy/reverse_proxy_test.exs
index f61fc02c5..8e72698ee 100644
--- a/test/reverse_proxy/reverse_proxy_test.exs
+++ b/test/reverse_proxy/reverse_proxy_test.exs
@@ -349,8 +349,8 @@ test "with content-disposition header", %{conn: conn} do
       Pleroma.Config.put(Pleroma.ReverseProxy.Client, Pleroma.ReverseProxy.Client.Tesla)
     end
 
-    clear_config(Pleroma.Gun.API) do
-      Pleroma.Config.put(Pleroma.Gun.API, Pleroma.Gun)
+    clear_config(Pleroma.Gun) do
+      Pleroma.Config.put(Pleroma.Gun, Pleroma.Gun.API)
     end
 
     setup do
diff --git a/lib/pleroma/gun/api/mock.ex b/test/support/gun_mock.ex
similarity index 79%
rename from lib/pleroma/gun/api/mock.ex
rename to test/support/gun_mock.ex
index 6d24b0e69..e13afd08c 100644
--- a/lib/pleroma/gun/api/mock.ex
+++ b/test/support/gun_mock.ex
@@ -2,16 +2,17 @@
 # Copyright © 2017-2019 Pleroma Authors <https://pleroma.social/>
 # SPDX-License-Identifier: AGPL-3.0-only
 
-defmodule Pleroma.Gun.API.Mock do
-  @behaviour Pleroma.Gun.API
+defmodule Pleroma.GunMock do
+  @behaviour Pleroma.Gun
 
-  alias Pleroma.Gun.API
+  alias Pleroma.Gun
+  alias Pleroma.GunMock
 
-  @impl API
+  @impl Gun
   def open('some-domain.com', 443, _) do
     {:ok, conn_pid} = Task.start_link(fn -> Process.sleep(1_000) end)
 
-    Registry.register(API.Mock, conn_pid, %{
+    Registry.register(GunMock, conn_pid, %{
       origin_scheme: "https",
       origin_host: 'some-domain.com',
       origin_port: 443
@@ -20,7 +21,7 @@ def open('some-domain.com', 443, _) do
     {:ok, conn_pid}
   end
 
-  @impl API
+  @impl Gun
   def open(ip, port, _)
       when ip in [{10_755, 10_368, 61_708, 131, 64_206, 45_068, 0, 9_694}, {127, 0, 0, 1}] and
              port in [80, 443] do
@@ -28,7 +29,7 @@ def open(ip, port, _)
 
     scheme = if port == 443, do: "https", else: "http"
 
-    Registry.register(API.Mock, conn_pid, %{
+    Registry.register(GunMock, conn_pid, %{
       origin_scheme: scheme,
       origin_host: ip,
       origin_port: port
@@ -37,7 +38,7 @@ def open(ip, port, _)
     {:ok, conn_pid}
   end
 
-  @impl API
+  @impl Gun
   def open('localhost', 1234, %{
         protocols: [:socks],
         proxy: {:socks5, 'localhost', 1234},
@@ -45,7 +46,7 @@ def open('localhost', 1234, %{
       }) do
     {:ok, conn_pid} = Task.start_link(fn -> Process.sleep(1_000) end)
 
-    Registry.register(API.Mock, conn_pid, %{
+    Registry.register(GunMock, conn_pid, %{
       origin_scheme: "http",
       origin_host: 'proxy-socks.com',
       origin_port: 80
@@ -54,7 +55,7 @@ def open('localhost', 1234, %{
     {:ok, conn_pid}
   end
 
-  @impl API
+  @impl Gun
   def open('localhost', 1234, %{
         protocols: [:socks],
         proxy: {:socks4, 'localhost', 1234},
@@ -69,7 +70,7 @@ def open('localhost', 1234, %{
       }) do
     {:ok, conn_pid} = Task.start_link(fn -> Process.sleep(1_000) end)
 
-    Registry.register(API.Mock, conn_pid, %{
+    Registry.register(GunMock, conn_pid, %{
       origin_scheme: "https",
       origin_host: 'proxy-socks.com',
       origin_port: 443
@@ -78,14 +79,14 @@ def open('localhost', 1234, %{
     {:ok, conn_pid}
   end
 
-  @impl API
+  @impl Gun
   def open('gun-not-up.com', 80, _opts), do: {:error, :timeout}
 
-  @impl API
+  @impl Gun
   def open('example.com', port, _) when port in [443, 115] do
     {:ok, conn_pid} = Task.start_link(fn -> Process.sleep(1_000) end)
 
-    Registry.register(API.Mock, conn_pid, %{
+    Registry.register(GunMock, conn_pid, %{
       origin_scheme: "https",
       origin_host: 'example.com',
       origin_port: 443
@@ -94,11 +95,11 @@ def open('example.com', port, _) when port in [443, 115] do
     {:ok, conn_pid}
   end
 
-  @impl API
+  @impl Gun
   def open(domain, 80, _) do
     {:ok, conn_pid} = Task.start_link(fn -> Process.sleep(1_000) end)
 
-    Registry.register(API.Mock, conn_pid, %{
+    Registry.register(GunMock, conn_pid, %{
       origin_scheme: "http",
       origin_host: domain,
       origin_port: 80
@@ -107,48 +108,48 @@ def open(domain, 80, _) do
     {:ok, conn_pid}
   end
 
-  @impl API
+  @impl Gun
   def open({127, 0, 0, 1}, 8123, _) do
     Task.start_link(fn -> Process.sleep(1_000) end)
   end
 
-  @impl API
+  @impl Gun
   def open('localhost', 9050, _) do
     Task.start_link(fn -> Process.sleep(1_000) end)
   end
 
-  @impl API
+  @impl Gun
   def await_up(_pid, _timeout), do: {:ok, :http}
 
-  @impl API
+  @impl Gun
   def set_owner(_pid, _owner), do: :ok
 
-  @impl API
+  @impl Gun
   def connect(pid, %{host: _, port: 80}) do
     ref = make_ref()
-    Registry.register(API.Mock, ref, pid)
+    Registry.register(GunMock, ref, pid)
     ref
   end
 
-  @impl API
+  @impl Gun
   def connect(pid, %{host: _, port: 443, protocols: [:http2], transport: :tls}) do
     ref = make_ref()
-    Registry.register(API.Mock, ref, pid)
+    Registry.register(GunMock, ref, pid)
     ref
   end
 
-  @impl API
+  @impl Gun
   def await(pid, ref) do
-    [{_, ^pid}] = Registry.lookup(API.Mock, ref)
+    [{_, ^pid}] = Registry.lookup(GunMock, ref)
     {:response, :fin, 200, []}
   end
 
-  @impl API
+  @impl Gun
   def info(pid) do
-    [{_, info}] = Registry.lookup(API.Mock, pid)
+    [{_, info}] = Registry.lookup(GunMock, pid)
     info
   end
 
-  @impl API
+  @impl Gun
   def close(_pid), do: :ok
 end