1 files changed, 19 insertions, 0 deletions

diff --git a/tests/forms_tests/tests/test_widgets.py b/tests/forms_tests/tests/test_widgets.py
index 62a14dfa5c..5f552b03fd 100644
--- a/tests/forms_tests/tests/test_widgets.py
+++ b/tests/forms_tests/tests/test_widgets.py
@@ -1345,6 +1345,25 @@ class ClearableFileInputTests(TestCase):
         self.assertIn('my<div>file', output)
         self.assertNotIn('my<div>file', output)
 
+    def test_html_does_not_mask_exceptions(self):
+        """
+        A ClearableFileInput should not mask exceptions produced while
+        checking that it has a value.
+        """
+        @python_2_unicode_compatible
+        class FailingURLFieldFile(object):
+            @property
+            def url(self):
+                raise RuntimeError('Canary')
+
+            def __str__(self):
+                return 'value'
+
+        widget = ClearableFileInput()
+        field = FailingURLFieldFile()
+        with self.assertRaisesMessage(RuntimeError, 'Canary'):
+            widget.render('myfile', field)
+
     def test_clear_input_renders_only_if_not_required(self):
         """
         A ClearableFileInput with is_required=False does not render a clear