Fix deprecation warnings

Closes #58

news/58.bugfix

@@ -0,0 +1 @@
+Fix deprecation warnings

plone/formwidget/namedfile/tests.py

@@ -39,7 +39,6 @@ def Title(self):
 
 
 class ScaleGenerateOnSaveTests(unittest.TestCase):
-
     layer = FUNCTIONAL_TESTING
 
     def setUp(self):
@@ -72,7 +71,9 @@ def test_generate_scales_on_save(self):
 
 def test_suite():
     suite = unittest.TestSuite()
-    suite.addTest(unittest.makeSuite(ScaleGenerateOnSaveTests))
+    suite.addTest(
+        unittest.defaultTestLoader.loadTestsFromTestCase(ScaleGenerateOnSaveTests)
+    )
     suite.addTest(
         layered(
             doctest.DocFileSuite(

plone/formwidget/namedfile/utils.py

@@ -1,17 +1,17 @@
 from BTrees.OOBTree import OOBTree
-from Products.CMFPlone.interfaces import IImagingSchema
-from ZPublisher.HTTPRequest import FileUpload
 from datetime import datetime
 from datetime import timedelta
 from persistent.dict import PersistentDict
+from plone.base.interfaces import IImagingSchema
 from plone.formwidget.namedfile.interfaces import IFileUploadTemporaryStorage
 from plone.registry.interfaces import IRegistry
 from random import randint
 from zope.annotation.interfaces import IAnnotations
 from zope.component import adapter
 from zope.component import getUtility
-from zope.interface import Interface
 from zope.interface import implementer
+from zope.interface import Interface
+from ZPublisher.HTTPRequest import FileUpload
 
 
 FILE_UPLOAD_MAP_KEY = "file_upload_map"

setup.py

@@ -32,6 +32,7 @@
     zip_safe=False,
     install_requires=[
         "setuptools",
+        "plone.base",
         "plone.namedfile",
         "plone.z3cform >= 0.7.4",
         "z3c.form",