diff --git a/docs/_ext/scrapydocs.py b/docs/_ext/scrapydocs.py
index f0827f2b15c..83b0d2cc64e 100644
--- a/docs/_ext/scrapydocs.py
+++ b/docs/_ext/scrapydocs.py
@@ -18,7 +18,7 @@ def is_setting_index(node):
     if node.tagname == 'index':
         # index entries for setting directives look like:
         # [(u'pair', u'SETTING_NAME; setting', u'std:setting-SETTING_NAME', '')]
-        entry_type, info, refid, _ = node['entries'][0]
+        entry_type, info, refid = node['entries'][0][:3]
         return entry_type == 'pair' and info.endswith('; setting')
     return False
 
@@ -30,7 +30,7 @@ def get_setting_target(node):
 
 def get_setting_name_and_refid(node):
     """Extract setting name from directive index node"""
-    entry_type, info, refid, _ = node['entries'][0]
+    entry_type, info, refid = node['entries'][0][:3]
     return info.replace('; setting', ''), refid
 
 
diff --git a/docs/topics/selectors.rst b/docs/topics/selectors.rst
index af3bb5be2d6..417e243aa7f 100644
--- a/docs/topics/selectors.rst
+++ b/docs/topics/selectors.rst
@@ -738,10 +738,14 @@ simple/convenient XPaths. You can use the
 
 Let's show an example that illustrates this with Github blog atom feed.
 
+.. highlight:: sh
+
 First, we open the shell with the url we want to scrape::
 
     $ scrapy shell https://github.com/blog.atom
 
+.. highlight:: python
+
 Once in the shell we can try selecting all ``<link>`` objects and see that it
 doesn't work (because the Atom XML namespace is obfuscating those nodes)::
 
diff --git a/tox.ini b/tox.ini
index fc5c2f39231..d80848c41d7 100644
--- a/tox.ini
+++ b/tox.ini
@@ -59,6 +59,7 @@ deps = {[testenv:py33]deps}
 changedir = docs
 deps =
     Sphinx
+    sphinx_rtd_theme
 
 [testenv:docs]
 changedir = {[docs]changedir}