diff --git a/plone/app/discussion/browser/validator.py b/plone/app/discussion/browser/validator.py
index 87d4914..9c5b5dd 100644
--- a/plone/app/discussion/browser/validator.py
+++ b/plone/app/discussion/browser/validator.py
@@ -32,7 +32,7 @@ except ImportError:
     pass
 
 try:
-    from plone.formwidget.recaptcha.validator import WrongCaptchaCode
+    from plone.formwidget.recaptcha.validator import WrongCaptchaCode  # noqa
 except ImportError:
     pass
 
diff --git a/plone/app/discussion/testing.py b/plone/app/discussion/testing.py
index 39e5221..400ab9c 100644
--- a/plone/app/discussion/testing.py
+++ b/plone/app/discussion/testing.py
@@ -9,7 +9,7 @@ from plone.app.testing import FunctionalTesting
 from zope.configuration import xmlconfig
 
 try:
-    import plone.app.collection
+    import plone.app.collection  # noqa
     COLLECTION_TYPE = "Collection"
 except:
     COLLECTION_TYPE = "Topic"
diff --git a/plone/app/discussion/upgrades.py b/plone/app/discussion/upgrades.py
index 9b255e3..bf9df71 100644
--- a/plone/app/discussion/upgrades.py
+++ b/plone/app/discussion/upgrades.py
@@ -6,4 +6,3 @@ from plone.app.discussion.interfaces import IDiscussionSettings
 def update_registry(context):
     registry = getUtility(IRegistry)
     registry.registerInterface(IDiscussionSettings)
-
diff --git a/plone/app/discussion/vocabularies.py b/plone/app/discussion/vocabularies.py
index 78f50ff..b811dce 100644
--- a/plone/app/discussion/vocabularies.py
+++ b/plone/app/discussion/vocabularies.py
@@ -6,28 +6,28 @@ from plone.app.discussion.interfaces import _
 
 HAS_CAPTCHA = False
 try:
-    import plone.formwidget.captcha
+    import plone.formwidget.captcha  # noqa
     HAS_CAPTCHA = True  # pragma: no cover
 except ImportError:
     pass
 
 HAS_RECAPTCHA = False
 try:
-    import plone.formwidget.recaptcha
+    import plone.formwidget.recaptcha  # noqa
     HAS_RECAPTCHA = True  # pragma: no cover
 except ImportError:
     pass
 
 HAS_AKISMET = False
 try:
-    import collective.akismet
+    import collective.akismet  # noqa
     HAS_AKISMET = True  # pragma: no cover
 except ImportError:
     pass
 
 HAS_NOROBOTS = False
 try:
-    import collective.z3cform.norobots
+    import collective.z3cform.norobots  # noqa
     HAS_NOROBOTS = True  # pragma: no cover
 except ImportError:
     pass