diff --git a/presubmit_canned_checks.py b/presubmit_canned_checks.py
index 52081912b..901a755ad 100644
--- a/presubmit_canned_checks.py
+++ b/presubmit_canned_checks.py
@@ -352,8 +352,8 @@ def CheckTreeIsOpen(input_api, output_api, url, closed):
     connection.close()
     if input_api.re.match(closed, status):
       long_text = status + '\n' + url
-      return [output_api.PresubmitPromptWarning('The tree is closed.',
-                                                long_text=long_text)]
+      return [output_api.PresubmitError('The tree is closed dude!',
+                                        long_text=long_text)]
   except IOError:
     pass
   return []
diff --git a/tests/presubmit_unittest.py b/tests/presubmit_unittest.py
index 084d96d2d..a1b145de9 100755
--- a/tests/presubmit_unittest.py
+++ b/tests/presubmit_unittest.py
@@ -1430,7 +1430,7 @@ class CannedChecksUnittest(PresubmitTestsBase):
         input_api, presubmit.OutputApi, url='url_to_closed', closed='0')
     self.assertEquals(len(results), 1)
     self.assertEquals(results[0].__class__,
-                      presubmit.OutputApi.PresubmitPromptWarning)
+                      presubmit.OutputApi.PresubmitError)
 
   def testRunPythonUnitTestsNoTest(self):
     input_api = self.MockInputApi(None, False)