diff --git a/.gitignore b/.gitignore
index 0b69ec0..4e0913d 100644
--- a/.gitignore
+++ b/.gitignore
@@ -9,3 +9,4 @@ parts
 develop-eggs
 htmlcov
 .coverage
+.cache
diff --git a/buildout.cfg b/buildout.cfg
index 12bfaf3..9a2612d 100644
--- a/buildout.cfg
+++ b/buildout.cfg
@@ -2,3 +2,11 @@
 extends = https://raw.github.com/collective/buildout.plonetest/master/test-5.0.x.cfg
 package-name = plone.formwidget.multifile
 package-extras = [tests]
+parts +=
+   coverage
+
+[coverage]
+recipe = zc.recipe.egg
+eggs =
+   ${test:eggs}
+   coverage
diff --git a/plone/formwidget/multifile/tests/test_doctests.py b/plone/formwidget/multifile/tests/test_doctests.py
index a48db7e..71faf7c 100644
--- a/plone/formwidget/multifile/tests/test_doctests.py
+++ b/plone/formwidget/multifile/tests/test_doctests.py
@@ -1,12 +1,11 @@
 import doctest
 import unittest
 import zope.app.testing.placelesssetup
-import zope.testing.doctest
 
 
 def test_suite():
     return unittest.TestSuite((
-        zope.testing.doctest.DocFileSuite('../README.txt',
+        doctest.DocFileSuite('../README.txt',
             setUp=zope.app.testing.placelesssetup.setUp,
             tearDown=zope.app.testing.placelesssetup.tearDown,
             optionflags=doctest.NORMALIZE_WHITESPACE | doctest.ELLIPSIS,