diff --git a/plone/app/discussion/tests/test_conversation.py b/plone/app/discussion/tests/test_conversation.py
index 712800f..76babf9 100644
--- a/plone/app/discussion/tests/test_conversation.py
+++ b/plone/app/discussion/tests/test_conversation.py
@@ -24,6 +24,12 @@ from plone.app.discussion.interfaces import IComment
 from plone.app.discussion.interfaces import IReplies
 from plone.app.discussion.interfaces import IDiscussionSettings
 
+try:
+    import plone.dexterity
+    DEXTERITY = True
+except:
+    DEXTERITY = False
+
 
 class ConversationTest(unittest.TestCase):
 
@@ -728,11 +734,11 @@ class ConversationEnabledForDexterityTypesTest(unittest.TestCase):
 
         typetool = self.portal.portal_types
         typetool.constructContent('Document', self.portal, 'doc1')
-
-        from plone.dexterity.interfaces import IDexterityContent
-        interface.alsoProvides(
-            self.portal.doc1,
-            IDexterityContent)
+        if DEXTERITY:
+                from plone.dexterity.interfaces import IDexterityContent
+                interface.alsoProvides(
+                    self.portal.doc1,
+                    IDexterityContent)
 
     def _makeOne(self, *args, **kw):
         return self.portal.doc1.restrictedTraverse('@@conversation_view')
@@ -748,33 +754,38 @@ class ConversationEnabledForDexterityTypesTest(unittest.TestCase):
         document_fti.manage_changeProperties(allow_discussion=allow_discussion)
 
     def test_conversation_is_not_enabled_by_default(self):
-        conversation = self._makeOne(self.portal.doc1)
-        self.assertFalse(conversation.enabled())
+        if DEXTERITY:
+            conversation = self._makeOne(self.portal.doc1)
+            self.assertFalse(conversation.enabled())
 
     def test_conversation_is_not_enabled_by_default_on_portal_type(self):
-        self._globally_enable_discussion(True)
-        conversation = self._makeOne(self.portal.doc1)
-        self.assertFalse(conversation.enabled())
+        if DEXTERITY:
+            self._globally_enable_discussion(True)
+            conversation = self._makeOne(self.portal.doc1)
+            self.assertFalse(conversation.enabled())
 
     def test_conversation_needs_to_be_enabled_globally_and_for_type(self):
-        self._globally_enable_discussion(True)
-        self._enable_discussion_on_portal_type('Document', True)
-        conversation = self._makeOne(self.portal.doc1)
-        self.assertTrue(conversation.enabled())
+        if DEXTERITY:
+            self._globally_enable_discussion(True)
+            self._enable_discussion_on_portal_type('Document', True)
+            conversation = self._makeOne(self.portal.doc1)
+            self.assertTrue(conversation.enabled())
 
     def test_disable_discussion(self):
-        self._globally_enable_discussion(True)
-        self._enable_discussion_on_portal_type('Document', True)
-        self.portal.doc1.allow_discussion = False
-        conversation = self._makeOne(self.portal.doc1)
-        self.assertFalse(conversation.enabled())
+        if DEXTERITY:
+            self._globally_enable_discussion(True)
+            self._enable_discussion_on_portal_type('Document', True)
+            self.portal.doc1.allow_discussion = False
+            conversation = self._makeOne(self.portal.doc1)
+            self.assertFalse(conversation.enabled())
 
     def test_enable_discussion(self):
-        self._globally_enable_discussion(True)
-        self._enable_discussion_on_portal_type('Document', True)
-        self.portal.doc1.allow_discussion = True
-        conversation = self._makeOne(self.portal.doc1)
-        self.assertTrue(conversation.enabled())
+        if DEXTERITY:
+            self._globally_enable_discussion(True)
+            self._enable_discussion_on_portal_type('Document', True)
+            self.portal.doc1.allow_discussion = True
+            conversation = self._makeOne(self.portal.doc1)
+            self.assertTrue(conversation.enabled())
 
 
 class RepliesTest(unittest.TestCase):