diff --git a/incorporealcms/config.py b/incorporealcms/config.py
index c754013..cb443d7 100644
--- a/incorporealcms/config.py
+++ b/incorporealcms/config.py
@@ -32,10 +32,9 @@ class Config(object):
         },
     }
 
-    MARKDOWN_EXTENSIONS = ['extra', 'sane_lists', 'smarty', 'tables']
+    MARKDOWN_EXTENSIONS = ['extra', 'sane_lists', 'smarty', 'toc']
     MARKDOWN_EXTENSION_CONFIGS = {
         'extra': {
-            'attr_list': {},
             'footnotes': {
                 'UNIQUE_IDS': True,
             },
diff --git a/tests/functional_tests.py b/tests/functional_tests.py
index 6ccd58c..168ef70 100644
--- a/tests/functional_tests.py
+++ b/tests/functional_tests.py
@@ -7,7 +7,7 @@ def test_page_that_exists(client):
     """Test that the app can serve a basic file at the index."""
     response = client.get('/')
     assert response.status_code == 200
-    assert b'<h1>test index</h1>' in response.data
+    assert b'<h1 id="test-index">test index</h1>' in response.data
 
 
 def test_direct_file_that_exists(client):