diff --git a/config/test.exs b/config/test.exs
index 27a7570..72cd8a8 100644
--- a/config/test.exs
+++ b/config/test.exs
@@ -4,7 +4,7 @@ config :logger, level: :warning
 
 config :tableau, Mix.Tasks.Tableau.FailExtension, enabled: true
 config :tableau, Mix.Tasks.Tableau.LogExtension, enabled: true
-config :tableau, Tableau.PostExtension, enabled: false
+config :tableau, Tableau.PostExtension, enabled: true
 config :tableau, Tableau.RSSExtension, enabled: false
 config :tableau, Tableau.SitemapExtension, enabled: false
 config :tableau, :config, url: "http://localhost:4999"
diff --git a/lib/mix/tasks/tableau.build.ex b/lib/mix/tasks/tableau.build.ex
index e4951b7..55446fd 100644
--- a/lib/mix/tasks/tableau.build.ex
+++ b/lib/mix/tasks/tableau.build.ex
@@ -74,7 +74,7 @@ defmodule Mix.Tasks.Tableau.Build do
 
   defp extensions_for(modules, type) do
     extensions =
-      for mod <- modules, {:ok, type} == Tableau.Extension.type(mod) do
+      for mod <- modules, Code.ensure_loaded?(mod), {:ok, type} == Tableau.Extension.type(mod) do
         mod
       end
 
diff --git a/lib/tableau/converters/mdex_converter.ex b/lib/tableau/converters/mdex_converter.ex
index f4bd9b1..597e773 100644
--- a/lib/tableau/converters/mdex_converter.ex
+++ b/lib/tableau/converters/mdex_converter.ex
@@ -2,7 +2,7 @@ defmodule Tableau.MDExConverter do
   @moduledoc """
   Converter to parse markdown content with `MDEx`
   """
-  def convert(_filepath, _front_matter, body, %{config: config}) do
+  def convert(_filepath, _front_matter, body, %{site: %{config: config}}) do
     MDEx.to_html!(body, config.markdown[:mdex])
   end
 end
diff --git a/lib/tableau/extensions/rss_extension.ex b/lib/tableau/extensions/rss_extension.ex
index db43031..1f64687 100644
--- a/lib/tableau/extensions/rss_extension.ex
+++ b/lib/tableau/extensions/rss_extension.ex
@@ -35,7 +35,7 @@ defmodule Tableau.RSSExtension do
     )
   end
 
-  def run(%{site: %{config: %{url: url}}, posts: posts, rss: rss} = token) do
+  def run(%{site: %{config: %{url: url}}, posts: posts, extensions: %{rss: %{config: rss}}} = token) do
     prelude =
       """
       <rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom">
diff --git a/test/mix/tasks/tableau.build_test.exs b/test/mix/tasks/tableau.build_test.exs
index e7c937c..f70c7ac 100644
--- a/test/mix/tasks/tableau.build_test.exs
+++ b/test/mix/tasks/tableau.build_test.exs
@@ -2,13 +2,8 @@ defmodule Mix.Tasks.Tableau.LogExtension do
   @moduledoc false
   use Tableau.Extension, key: :log, type: :pre_build, priority: 200
 
-  defmodule Config do
-    @moduledoc false
-    def new(i), do: {:ok, i}
-  end
-
   def run(token) do
-    IO.inspect(System.monotonic_time(), label: "second")
+    IO.write(:stderr, "second: #{System.monotonic_time()}\n")
     {:ok, token}
   end
 end
@@ -18,7 +13,7 @@ defmodule Mix.Tasks.Tableau.FailExtension do
   use Tableau.Extension, key: :fail, type: :pre_build, priority: 100
 
   def run(_site) do
-    IO.inspect(System.monotonic_time(), label: "first")
+    IO.write(:stderr, "first: #{System.monotonic_time()}\n")
     :error
   end
 end
@@ -145,8 +140,38 @@ defmodule Mix.Tasks.Tableau.BuildTest do
 
   @tag :tmp_dir
   test "renders all pages", %{tmp_dir: out} do
+    posts = out |> Path.join("_posts") |> tap(&File.mkdir_p!/1)
+    pages = out |> Path.join("_pages") |> tap(&File.mkdir_p!/1)
+    Application.put_env(:tableau, Tableau.PostExtension, enabled: true, dir: posts)
+    Application.put_env(:tableau, Tableau.PageExtension, enabled: true, dir: pages)
+
+    File.write(Path.join(posts, "my-post.md"), """
+    ---
+    layout: Mix.Tasks.Tableau.BuildTest.RootLayout
+    title: A Bing Bong Blog Post
+    date: 2017-02-28
+    categories: post
+    permalink: /:title/
+    ---
+
+    ## Bing
+
+    Bong!
+    """)
+
+    page_path = pages |> Path.join("some/deeply/nested/page") |> tap(&File.mkdir_p!/1) |> Path.join("/my-page.md")
+
+    File.write(page_path, """
+    ---
+    layout: Mix.Tasks.Tableau.BuildTest.RootLayout
+    title: Beginner Tutorial
+    ---
+
+    ## How to get started
+    """)
+
     {log, io} =
-      with_io(fn ->
+      with_io(:stderr, fn ->
         {_, log} =
           with_log(fn ->
             _documents = Build.run(["--out", out])
@@ -171,5 +196,7 @@ defmodule Mix.Tasks.Tableau.BuildTest do
 
     assert File.exists?(Path.join(out, "/index.html"))
     assert File.exists?(Path.join(out, "/about/index.html"))
+    assert File.exists?(Path.join(out, "/a-bing-bong-blog-post/index.html"))
+    assert File.exists?(Path.join(out, "/some/deeply/nested/page/my-page/index.html"))
   end
 end