diff --git a/.formatter.exs b/.formatter.exs
index d97672b..7f59b1f 100644
--- a/.formatter.exs
+++ b/.formatter.exs
@@ -1,12 +1,4 @@
-# Used by "mix format" and to export configuration.
-export_locals_without_parens = [
-  plug: 1,
-  plug: 2,
-  get: 2
-]
-
+# Used by "mix format"
 [
-  inputs: ["{mix,.formatter}.exs", "{integration,lib,test}/**/*.{ex,exs}"],
-  locals_without_parens: export_locals_without_parens,
-  export: [locals_without_parens: export_locals_without_parens]
+  inputs: ["{mix,.formatter}.exs", "{lib,test}/**/*.{ex,exs}"]
 ]
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 9200b4b..cfe667a 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -19,17 +19,44 @@ jobs:
           otp-version: 27.0
           elixir-version: 1.18
       - uses: actions/cache@v4
+        env:
+          cache-name: assent
         with:
           path: |
-            _build/test
+            _build
             deps
-          key: ${{ runner.os }}-mix-${{ hashFiles('**/mix.lock') }}  
+          key: ${{ runner.os }}-mix-${{ env.cache-name }}-${{ hashFiles('**/mix.lock') }}  
       - run: mix deps.get
       - run: mix compile --warnings-as-errors
       - run: mix credo --strict --ignore design.tagtodo
       - run: mix format --check-formatted
       - run: mix dialyzer --format github
 
+  integration:
+    runs-on: ubuntu-latest
+    name: Integration server
+    defaults:
+      run:
+        working-directory: integration
+    steps:
+      - uses: actions/checkout@v3
+      - uses: erlef/setup-beam@v1
+        with:
+          otp-version: 27.0
+          elixir-version: 1.18
+      - uses: actions/cache@v4
+        env:
+          cache-name: integration-server
+        with:
+          path: |
+            integration/_build
+            integration/deps
+          key: ${{ runner.os }}-mix-${{ env.cache-name }}-${{ hashFiles('**/integration/mix.lock') }}  
+      - run: mix deps.get
+      - run: mix compile --warnings-as-errors
+      - run: mix format --check-formatted
+      - run: mix dialyzer --format github
+
   test:
     strategy:
       matrix:
diff --git a/integration/.formatter.exs b/integration/.formatter.exs
new file mode 100644
index 0000000..d97672b
--- /dev/null
+++ b/integration/.formatter.exs
@@ -0,0 +1,12 @@
+# Used by "mix format" and to export configuration.
+export_locals_without_parens = [
+  plug: 1,
+  plug: 2,
+  get: 2
+]
+
+[
+  inputs: ["{mix,.formatter}.exs", "{integration,lib,test}/**/*.{ex,exs}"],
+  locals_without_parens: export_locals_without_parens,
+  export: [locals_without_parens: export_locals_without_parens]
+]
diff --git a/integration/.gitignore b/integration/.gitignore
new file mode 100644
index 0000000..671aba8
--- /dev/null
+++ b/integration/.gitignore
@@ -0,0 +1,23 @@
+# The directory Mix will write compiled artifacts to.
+/_build/
+
+# If you run "mix test --cover", coverage assets end up here.
+/cover/
+
+# The directory Mix downloads your dependencies sources to.
+/deps/
+
+# Where third-party dependencies like ExDoc output generated docs.
+/doc/
+
+# If the VM crashes, it generates a dump, let's ignore it too.
+erl_crash.dump
+
+# Also ignore archive artifacts (built via "mix archive.build").
+*.ez
+
+# Ignore package tarball (built via "mix hex.build").
+project-*.tar
+
+# Temporary files, for example, from tests.
+/tmp/
\ No newline at end of file
diff --git a/integration/README.md b/integration/README.md
index ec20fd3..8463bef 100644
--- a/integration/README.md
+++ b/integration/README.md
@@ -3,5 +3,5 @@
 Simple plug-based server to test assent integration with all providers.
 
 ```bash
-CLIENT_ID=CLIENT_ID CLIENT_SECRET=CLIENT_SECRET MIX_ENV=test mix run --no-halt integration/server.exs
+mix run --no-halt
 ```
diff --git a/integration/lib/application.ex b/integration/lib/application.ex
new file mode 100644
index 0000000..2bae81f
--- /dev/null
+++ b/integration/lib/application.ex
@@ -0,0 +1,12 @@
+defmodule IntegrationServer.Application do
+  use Application
+
+  def start(_type, _args) do
+    children = [
+      {Bandit, plug: IntegrationServer.Router}
+    ]
+
+    opts = [strategy: :one_for_one, name: IntegrationServer.Supervisor]
+    Supervisor.start_link(children, opts)
+  end
+end
diff --git a/integration/lib/router.ex b/integration/lib/router.ex
new file mode 100644
index 0000000..4fb88e6
--- /dev/null
+++ b/integration/lib/router.ex
@@ -0,0 +1,122 @@
+defmodule IntegrationServer.Router do
+  use Plug.Router
+  use Plug.Debugger
+  use Plug.ErrorHandler
+
+  require Logger
+
+  import Plug.Conn
+
+  @session_options [
+    store: :cookie,
+    key: "_assent_integration_server",
+    signing_salt: "Q1OaP6Pz",
+    same_site: "Lax"
+  ]
+
+  plug :secret_key_base
+  plug Plug.Session, @session_options
+  plug :fetch_session
+  plug :match
+  plug :dispatch
+
+  {:ok, modules} = :application.get_key(:assent, :modules)
+
+  @path_modules modules
+                |> Enum.map(&{Module.split(&1), &1})
+                |> Enum.map(fn
+                  {["Assent", "Strategy", uri], module} ->
+                    path = Macro.underscore(uri)
+                    fun_name = String.to_atom(path)
+                    {path, module, fun_name}
+
+                  _any ->
+                    nil
+                end)
+                |> Enum.reject(&is_nil/1)
+
+  defp secret_key_base(conn, _opts) do
+    %{conn | secret_key_base: "LG8WiSkAlUlwVJpISmRYsi7aJV/Qlv65FXyxwWXxp1QUzQY3hzEfg73YKfKZPpe0"}
+  end
+
+  for {path, module, fun_name} <- @path_modules do
+    @file "#{__ENV__.file}##{path}_auth"
+    defp unquote(fun_name)(conn, :auth) do
+      unquote(path)
+      |> config!()
+      |> unquote(module).authorize_url()
+      |> case do
+        {:ok, %{session_params: session_params, url: url}} ->
+          Logger.info("Redirecting to #{inspect(url)} with session params #{inspect(session_params)}")
+
+          html = Plug.HTML.html_escape(url)
+          body = "<html><body>You are being <a href=\"#{html}\">redirected</a>.</body></html>"
+
+          conn
+          |> put_session(:session_params, session_params)
+          |> put_resp_header("location", url)
+          |> put_resp_header("content-type", "text/html")
+          |> send_resp(302, body)
+
+        {:error, error} ->
+          body = "<html><body>An error occurred: #{inspect error}.</body></html>"
+
+          conn
+          |> put_resp_header("content-type", "text/html")
+          |> send_resp(500, body)
+      end
+    end
+
+    @file "#{__ENV__.file}##{path}_callback"
+    defp unquote(fun_name)(conn, :callback) do
+      conn = fetch_query_params(conn)
+
+      unquote(path)
+      |> config!()
+      |> Assent.Config.put(:session_params, get_session(conn, :session_params))
+      |> unquote(module).callback(conn.params)
+      |> case do
+        {:ok, %{user: user, token: token}} ->
+          body = "<html><body>#{inspect(%{user: user, token: token})}</body></html>"
+
+          send_resp(conn, 200, body)
+
+        {:error, error} ->
+          body = "<html><body>An error occurred: #{inspect error}.</body></html>"
+
+          conn
+          |> put_resp_header("content-type", "text/html")
+          |> send_resp(500, body)
+      end
+    end
+  end
+
+  get "/" do
+    list =
+      @path_modules
+      |> Enum.map(&"<li><a href=\"/#{elem(&1, 0)}\">#{elem(&1, 0)}</a></li>")
+      |> Enum.join()
+
+    body = "<html><body><ul>#{list}</ul></body></html>"
+
+    send_resp(conn, 200, body)
+  end
+
+  for {path, _module, fun_name} <- @path_modules do
+    get "/#{path}", do: unquote(fun_name)(conn, :auth)
+    get "/#{path}/callback", do: unquote(fun_name)(conn, :callback)
+  end
+
+  def config!(path) do
+    [
+      client_id: System.fetch_env!("CLIENT_ID"),
+      client_secret: System.fetch_env!("CLIENT_SECRET"),
+      redirect_uri: "http://localhost:4000/#{path}/callback"
+    ]
+  end
+
+  @impl true
+  def handle_errors(conn, %{kind: _kind, reason: _reason, stack: _stack}) do
+    send_resp(conn, conn.status, "Something went wrong")
+  end
+end
diff --git a/integration/mix.exs b/integration/mix.exs
new file mode 100644
index 0000000..c675461
--- /dev/null
+++ b/integration/mix.exs
@@ -0,0 +1,32 @@
+defmodule IntegrationServer.MixProject do
+  use Mix.Project
+
+  def project do
+    [
+      app: :integration_server,
+      version: "0.0.1",
+      elixir: "~> 1.13",
+      elixirc_paths: elixirc_paths(Mix.env()),
+      start_permanent: Mix.env() == :prod,
+      deps: deps()
+    ]
+  end
+
+  def application do
+    [
+      mod: {IntegrationServer.Application, []},
+      extra_applications: [:logger, :runtime_tools]
+    ]
+  end
+
+  defp elixirc_paths(_), do: ["lib"]
+
+  defp deps do
+    [
+      {:assent, path: "../"},
+      {:plug, ">= 0.0.0"},
+      {:bandit, ">= 0.0.0"},
+      {:dialyxir, "~> 1.4", runtime: false}
+    ]
+  end
+end
diff --git a/integration/mix.lock b/integration/mix.lock
new file mode 100644
index 0000000..b351320
--- /dev/null
+++ b/integration/mix.lock
@@ -0,0 +1,12 @@
+%{
+  "bandit": {:hex, :bandit, "1.6.1", "9e01b93d72ddc21d8c576a704949e86ee6cde7d11270a1d3073787876527a48f", [:mix], [{:hpax, "~> 1.0", [hex: :hpax, repo: "hexpm", optional: false]}, {:plug, "~> 1.14", [hex: :plug, repo: "hexpm", optional: false]}, {:telemetry, "~> 0.4 or ~> 1.0", [hex: :telemetry, repo: "hexpm", optional: false]}, {:thousand_island, "~> 1.0", [hex: :thousand_island, repo: "hexpm", optional: false]}, {:websock, "~> 0.5", [hex: :websock, repo: "hexpm", optional: false]}], "hexpm", "5a904bf010ea24b67979835e0507688e31ac873d4ffc8ed0e5413e8d77455031"},
+  "dialyxir": {:hex, :dialyxir, "1.4.5", "ca1571ac18e0f88d4ab245f0b60fa31ff1b12cbae2b11bd25d207f865e8ae78a", [:mix], [{:erlex, ">= 0.2.7", [hex: :erlex, repo: "hexpm", optional: false]}], "hexpm", "b0fb08bb8107c750db5c0b324fa2df5ceaa0f9307690ee3c1f6ba5b9eb5d35c3"},
+  "erlex": {:hex, :erlex, "0.2.7", "810e8725f96ab74d17aac676e748627a07bc87eb950d2b83acd29dc047a30595", [:mix], [], "hexpm", "3ed95f79d1a844c3f6bf0cea61e0d5612a42ce56da9c03f01df538685365efb0"},
+  "hpax": {:hex, :hpax, "1.0.2", "762df951b0c399ff67cc57c3995ec3cf46d696e41f0bba17da0518d94acd4aac", [:mix], [], "hexpm", "2f09b4c1074e0abd846747329eaa26d535be0eb3d189fa69d812bfb8bfefd32f"},
+  "mime": {:hex, :mime, "2.0.6", "8f18486773d9b15f95f4f4f1e39b710045fa1de891fada4516559967276e4dc2", [:mix], [], "hexpm", "c9945363a6b26d747389aac3643f8e0e09d30499a138ad64fe8fd1d13d9b153e"},
+  "plug": {:hex, :plug, "1.16.1", "40c74619c12f82736d2214557dedec2e9762029b2438d6d175c5074c933edc9d", [:mix], [{:mime, "~> 1.0 or ~> 2.0", [hex: :mime, repo: "hexpm", optional: false]}, {:plug_crypto, "~> 1.1.1 or ~> 1.2 or ~> 2.0", [hex: :plug_crypto, repo: "hexpm", optional: false]}, {:telemetry, "~> 0.4.3 or ~> 1.0", [hex: :telemetry, repo: "hexpm", optional: false]}], "hexpm", "a13ff6b9006b03d7e33874945b2755253841b238c34071ed85b0e86057f8cddc"},
+  "plug_crypto": {:hex, :plug_crypto, "2.1.0", "f44309c2b06d249c27c8d3f65cfe08158ade08418cf540fd4f72d4d6863abb7b", [:mix], [], "hexpm", "131216a4b030b8f8ce0f26038bc4421ae60e4bb95c5cf5395e1421437824c4fa"},
+  "telemetry": {:hex, :telemetry, "1.3.0", "fedebbae410d715cf8e7062c96a1ef32ec22e764197f70cda73d82778d61e7a2", [:rebar3], [], "hexpm", "7015fc8919dbe63764f4b4b87a95b7c0996bd539e0d499be6ec9d7f3875b79e6"},
+  "thousand_island": {:hex, :thousand_island, "1.3.7", "1da7598c0f4f5f50562c097a3f8af308ded48cd35139f0e6f17d9443e4d0c9c5", [:mix], [{:telemetry, "~> 0.4 or ~> 1.0", [hex: :telemetry, repo: "hexpm", optional: false]}], "hexpm", "0139335079953de41d381a6134d8b618d53d084f558c734f2662d1a72818dd12"},
+  "websock": {:hex, :websock, "0.5.3", "2f69a6ebe810328555b6fe5c831a851f485e303a7c8ce6c5f675abeb20ebdadc", [:mix], [], "hexpm", "6105453d7fac22c712ad66fab1d45abdf049868f253cf719b625151460b8b453"},
+}
diff --git a/integration/server.exs b/integration/server.exs
deleted file mode 100644
index 4172c9d..0000000
--- a/integration/server.exs
+++ /dev/null
@@ -1,96 +0,0 @@
-defmodule IntegrationServer.Router do
-  use Plug.Router
-  use Plug.Debugger
-  use Plug.ErrorHandler
-
-  require Logger
-
-  import Plug.Conn
-
-  @session_options [
-    store: :cookie,
-    key: "_assent_integration_server",
-    signing_salt: "Q1OaP6Pz",
-    same_site: "Lax"
-  ]
-
-  plug :secret_key_base
-  plug Plug.Session, @session_options
-  plug :fetch_session
-  plug :match
-  plug :dispatch
-
-  {:ok, modules} = :application.get_key(:assent, :modules)
-
-  @path_modules modules
-                |> Enum.map(&{Module.split(&1), &1})
-                |> Enum.map(fn
-                  {["Assent", "Strategy", uri], module} -> {uri, module}
-                  _any -> nil
-                end)
-                |> Enum.reject(&is_nil/1)
-                |> Enum.into(%{})
-
-  defp secret_key_base(conn, _opts) do
-    %{conn | secret_key_base: "LG8WiSkAlUlwVJpISmRYsi7aJV/Qlv65FXyxwWXxp1QUzQY3hzEfg73YKfKZPpe0"}
-  end
-
-  get "/" do
-    list =
-      @path_modules
-      |> Enum.map(&"<li><a href=\"/#{elem(&1, 0)}\">#{elem(&1, 0)}</a></li>")
-      |> Enum.join()
-
-    body = "<html><body><ul>#{list}</ul></body></html>"
-
-    send_resp(conn, 200, body)
-  end
-
-  get "/:provider" do
-    module = Map.fetch!(@path_modules, provider)
-
-    {:ok, %{url: url, session_params: session_params}} = module.authorize_url(config!(provider))
-
-    Logger.info("Redirecting to #{inspect(url)} with session params #{inspect(session_params)}")
-
-    html = Plug.HTML.html_escape(url)
-    body = "<html><body>You are being <a href=\"#{html}\">redirected</a>.</body></html>"
-
-    conn
-    |> put_session(:session_params, session_params)
-    |> put_resp_header("location", url)
-    |> put_resp_header("content-type", "text/html")
-    |> send_resp(302, body)
-  end
-
-  get "/:provider/callback" do
-    module = Map.fetch!(@path_modules, provider)
-
-    conn = fetch_query_params(conn)
-
-    {:ok, %{user: user, token: token}} =
-      provider
-      |> config!()
-      |> Assent.Config.put(:session_params, get_session(conn, :session_params))
-      |> module.callback(conn.params)
-
-    body = "<html><body>#{inspect(%{user: user, token: token})}</body></html>"
-
-    send_resp(conn, 200, body)
-  end
-
-  def config!(provider) do
-    [
-      client_id: System.fetch_env!("CLIENT_ID"),
-      client_secret: System.fetch_env!("CLIENT_SECRET"),
-      redirect_uri: "http://localhost:4000/#{provider}/callback"
-    ]
-  end
-
-  defp handle_errors(conn, %{kind: _kind, reason: _reason, stack: _stack}) do
-    send_resp(conn, conn.status, "Something went wrong")
-  end
-end
-
-{:ok, pid} = Bandit.start_link(plug: IntegrationServer.Router)
-Process.unlink(pid)
diff --git a/mix.exs b/mix.exs
index 93e76f0..f80e113 100644
--- a/mix.exs
+++ b/mix.exs
@@ -47,6 +47,7 @@ defmodule Assent.MixProject do
       {:credo, "~> 1.1", only: [:dev, :test]},
       {:dialyxir, "~> 1.4", only: [:dev, :test], runtime: false},
       {:test_server, "~> 0.1.0", only: :test},
+      {:plug, ">= 0.0.0", only: [:dev, :test]},
       {:bandit, ">= 0.0.0", only: :test}
     ]
   end