Assert that views of the form

  class MyView(BrowserView):

      __call__ = ViewPageTemplateFile('...')

work.

lib/python/Products/Five/browser/tests/pages.py

@@ -16,6 +16,7 @@
 $Id$
 """
 from Products.Five import BrowserView
+from Products.Five.browser.pagetemplatefile import ViewPageTemplateFile
 
 class SimpleView(BrowserView):
     """More docstring. Please Zope"""
@@ -39,6 +40,10 @@ class CallView(BrowserView):
     def __call__(self):
         return u"I was __call__()'ed"
 
+class CallTemplate(BrowserView):
+
+    __call__ = ViewPageTemplateFile('falcon.pt')
+
 class CallableNoDocstring:
 
     def __call__(self):

lib/python/Products/Five/browser/tests/pages.zcml

@@ -161,6 +161,13 @@
       permission="zope2.Public"
       />
 
+  <browser:page
+      for="Products.Five.tests.testing.simplecontent.ISimpleContent"
+      class=".pages.CallTemplate"
+      name="calltemplate.html"
+      permission="zope2.Public"
+      />
+
   <!-- pages from methods/functions/callables that don't have docstrings -->
   <browser:pages
       for="Products.Five.tests.testing.simplecontent.ISimpleContent"

lib/python/Products/Five/browser/tests/pages_ftest.txt

@@ -144,6 +144,14 @@ class bearing only a __call__ method:
   ...
   I was __call__()'ed
 
+or a __call__ object that's callable, such as a ViewPageTemplateFile:
+
+  >>> print http(r'''
+  ... GET /test_folder_1_/testoid/calltemplate.html HTTP/1.1
+  ... ''')
+  HTTP/1.1 200 OK
+  ...
+  <p>The falcon has taken flight</p>
 
 Clean up
 --------