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diff --git a/test/plugs/remote_ip_test.exs b/test/plugs/remote_ip_test.exs
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+++ b/test/plugs/remote_ip_test.exs
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+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2019 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.Plugs.RemoteIpTest do
+  use ExUnit.Case, async: true
+  use Plug.Test
+
+  alias Pleroma.Plugs.RemoteIp
+
+  test "disabled" do
+    Pleroma.Config.put(RemoteIp, enabled: false)
+
+    %{remote_ip: remote_ip} = conn(:get, "/")
+
+    conn =
+      conn(:get, "/")
+      |> put_req_header("x-forwarded-for", "1.1.1.1")
+      |> RemoteIp.call(nil)
+
+    assert conn.remote_ip == remote_ip
+  end
+
+  test "enabled" do
+    Pleroma.Config.put(RemoteIp, enabled: true)
+
+    conn =
+      conn(:get, "/")
+      |> put_req_header("x-forwarded-for", "1.1.1.1")
+      |> RemoteIp.call(nil)
+
+    assert conn.remote_ip == {1, 1, 1, 1}
+  end
+
+  test "custom headers" do
+    Pleroma.Config.put(RemoteIp, enabled: true, headers: ["cf-connecting-ip"])
+
+    conn =
+      conn(:get, "/")
+      |> put_req_header("x-forwarded-for", "1.1.1.1")
+      |> RemoteIp.call(nil)
+
+    refute conn.remote_ip == {1, 1, 1, 1}
+
+    conn =
+      conn(:get, "/")
+      |> put_req_header("cf-connecting-ip", "1.1.1.1")
+      |> RemoteIp.call(nil)
+
+    assert conn.remote_ip == {1, 1, 1, 1}
+  end
+
+  test "custom proxies" do
+    Pleroma.Config.put(RemoteIp, enabled: true)
+
+    conn =
+      conn(:get, "/")
+      |> put_req_header("x-forwarded-for", "173.245.48.1, 1.1.1.1, 173.245.48.2")
+      |> RemoteIp.call(nil)
+
+    refute conn.remote_ip == {1, 1, 1, 1}
+
+    Pleroma.Config.put([RemoteIp, :proxies], ["173.245.48.0/20"])
+
+    conn =
+      conn(:get, "/")
+      |> put_req_header("x-forwarded-for", "173.245.48.1, 1.1.1.1, 173.245.48.2")
+      |> RemoteIp.call(nil)
+
+    assert conn.remote_ip == {1, 1, 1, 1}
+  end
+end