diff --git a/docs/source/dev/registering_plugins.rst b/docs/source/dev/registering_plugins.rst
index 48e39fc..0cc18d9 100644
--- a/docs/source/dev/registering_plugins.rst
+++ b/docs/source/dev/registering_plugins.rst
@@ -79,7 +79,7 @@ Note specifically these lines:
         # snip ...
     )
 
-We tell setuptools to register our entry point "X" inside the specific 
+We tell setuptools to register our entry point "X" inside the specific
 grouping of entry-points that flake8 should look in.
 
 Flake8 presently looks at three groups:
diff --git a/tox.ini b/tox.ini
index 00d6469..ba6c1af 100644
--- a/tox.ini
+++ b/tox.ini
@@ -36,6 +36,17 @@ deps =
 commands =
     pylint flake8
 
+[testenv:doc8]
+basepython = python3
+skipsdist = true
+skip_install = true
+use_develop = false
+deps =
+    sphinx
+    doc8
+commands =
+    doc8 docs/source/
+
 [testenv:mypy]
 basepython = python3
 skipsdist = true