diff --git a/CHANGES.rst b/CHANGES.rst
index 8025f69..41e93af 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -21,6 +21,12 @@ Bug fixes:
   instead of Products.Five.testbrowser
   [davisagli]
 
+- Fix test setup for Zope 4.
+  [davisagli]
+
+- Use __parent__ instead of aq_parent.
+  [davisagli]
+
 
 2.0.13 (2017-01-01)
 -------------------
diff --git a/plone/schemaeditor/browser/field/edit.py b/plone/schemaeditor/browser/field/edit.py
index b6e5f57..c38dffa 100644
--- a/plone/schemaeditor/browser/field/edit.py
+++ b/plone/schemaeditor/browser/field/edit.py
@@ -1,6 +1,5 @@
 # -*- coding: utf-8 -*-
 from Acquisition import aq_inner
-from Acquisition import aq_parent
 from plone.autoform.form import AutoExtensibleForm
 from plone.schemaeditor import _
 from plone.schemaeditor import interfaces
@@ -123,7 +122,7 @@ def _schema(self):
 
     @lazy_property
     def additionalSchemata(self):
-        schema_context = self.context.aq_parent
+        schema_context = self.context.__parent__
         return [v for k, v in getAdapters((schema_context, self.field),
                                           interfaces.IFieldEditorExtender)]
 
@@ -165,14 +164,14 @@ def handleSave(self, action):
             IStatusMessage(self.request).addStatusMessage(
                 self.noChangesMessage, type='info')
 
-        notify(SchemaModifiedEvent(self.context.aq_parent))
+        notify(SchemaModifiedEvent(self.context.__parent__))
 
     @button.buttonAndHandler(_(u'Cancel'), name='cancel')
     def handleCancel(self, action):
         self.redirectToParent()
 
     def redirectToParent(self):
-        parent = aq_parent(aq_inner(self.context))
+        parent = aq_inner(self.context).__parent__
         url = parent.absolute_url()
         if hasattr(parent, 'schemaEditorView') and parent.schemaEditorView:
             url += '/@@' + parent.schemaEditorView
diff --git a/plone/schemaeditor/browser/field/fieldset.py b/plone/schemaeditor/browser/field/fieldset.py
index cf1a919..d6fd34d 100644
--- a/plone/schemaeditor/browser/field/fieldset.py
+++ b/plone/schemaeditor/browser/field/fieldset.py
@@ -59,4 +59,4 @@ def change(self, fieldset_index):
         schema.moveField(field_name, new_position)
 
         notifyContainerModified(self.schema)
-        notify(SchemaModifiedEvent(self.aq_parent.aq_parent))
+        notify(SchemaModifiedEvent(self.__parent__.__parent__))
diff --git a/plone/schemaeditor/browser/field/order.py b/plone/schemaeditor/browser/field/order.py
index 9053f6c..e42bb80 100644
--- a/plone/schemaeditor/browser/field/order.py
+++ b/plone/schemaeditor/browser/field/order.py
@@ -45,7 +45,7 @@ def move(self, pos, fieldset_index):
         schema.moveField(fieldname, new_absolute_position)
 
         notifyContainerModified(self.schema)
-        notify(SchemaModifiedEvent(self.aq_parent.aq_parent))
+        notify(SchemaModifiedEvent(self.__parent__.__parent__))
 
     def delete(self):
         """
@@ -54,5 +54,5 @@ def delete(self):
         schema = IEditableSchema(self.schema)
         schema.removeField(self.field.getName())
         notify(ObjectRemovedEvent(self.field, self.schema))
-        notify(FieldRemovedEvent(self.aq_parent.aq_parent, self.field))
+        notify(FieldRemovedEvent(self.__parent__.__parent__, self.field))
         self.request.response.setHeader('Content-Type', 'application/json')
diff --git a/plone/schemaeditor/tests/browser_testing.zcml b/plone/schemaeditor/tests/browser_testing.zcml
index 6a8ec7d..bda61df 100644
--- a/plone/schemaeditor/tests/browser_testing.zcml
+++ b/plone/schemaeditor/tests/browser_testing.zcml
@@ -1,6 +1,12 @@
 <configure
     xmlns="http://namespaces.zope.org/zope"
-    xmlns:browser="http://namespaces.zope.org/browser">
+    xmlns:browser="http://namespaces.zope.org/browser"
+    xmlns:zcml="http://namespaces.zope.org/zcml">
+
+    <!-- only load PageTemplates zcml in Zope 4 -->
+    <configure zcml:condition="installed Products.PageTemplates.engine">
+        <include package="Products.PageTemplates" />
+    </configure>
 
     <include package="Products.GenericSetup" file="meta.zcml" />
     <include package="Products.Five" file="meta.zcml" />