diff --git a/test/bug.634.t b/test/bug.634.t
deleted file mode 100755
index e707b2e0d..000000000
--- a/test/bug.634.t
+++ /dev/null
@@ -1,61 +0,0 @@
-#! /usr/bin/env perl
-################################################################################
-##
-## Copyright 2006 - 2015, Paul Beckingham, Federico Hernandez.
-##
-## Permission is hereby granted, free of charge, to any person obtaining a copy
-## of this software and associated documentation files (the "Software"), to deal
-## in the Software without restriction, including without limitation the rights
-## to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-## copies of the Software, and to permit persons to whom the Software is
-## furnished to do so, subject to the following conditions:
-##
-## The above copyright notice and this permission notice shall be included
-## in all copies or substantial portions of the Software.
-##
-## THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
-## OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-## FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
-## THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-## LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-## OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
-## SOFTWARE.
-##
-## http://www.opensource.org/licenses/mit-license.php
-##
-################################################################################
-
-use strict;
-use warnings;
-use Test::More tests => 2;
-
-# Ensure environment has no influence.
-delete $ENV{'TASKDATA'};
-delete $ENV{'TASKRC'};
-
-use File::Basename;
-my $ut = basename ($0);
-my $rc = $ut . '.rc';
-
-# Create the rc file.
-if (open my $fh, '>', $rc)
-{
-  print $fh "data.location=.\n",
-            "confirmation=no\n";
-  close $fh;
-}
-
-# Bug 634: confirmation=off not honored by undo
-
-# Setup: Add a task
-qx{../src/task rc:$rc add Test 2>&1};
-
-# Result: Attempt to undo add with confirmation=off
-my $output = qx{echo 'n' | ../src/task rc:$rc rc.confirmation=off undo 2>&1};
-like   ($output, qr/^Task removed.$/ms, "$ut: Task removed.");
-unlike ($output, qr/Are you sure/ms,    "$ut: Undo honors confirmation=off.");
-
-# Cleanup.
-unlink qw(pending.data completed.data undo.data backlog.data), $rc;
-exit 0;
-
diff --git a/test/undo.t b/test/undo.t
index 7c93196b8..e25166355 100755
--- a/test/undo.t
+++ b/test/undo.t
@@ -42,22 +42,22 @@ class TestUndo(TestCase):
 
     def test_add_undo(self):
         """'add' then 'undo'"""
-        code, out, err = self.t('add one')
+        self.t('add one')
         code, out, err = self.t('_get 1.status')
         self.assertEqual(out.strip(), 'pending')
-        code, out, err = self.t('undo')
+        self.t('undo')
         code, out, err = self.t('_get 1.status')
         self.assertEqual(out.strip(), '')
 
     def test_add_done_undo(self):
         """'add' then 'done' then 'undo'"""
-        code, out, err = self.t('add two')
+        self.t('add two')
         code, out, err = self.t('_get 1.status')
         self.assertEqual(out.strip(), 'pending')
-        code, out, err = self.t('1 done')
+        self.t('1 done')
         code, out, err = self.t('_get 1.status')
         self.assertEqual(out.strip(), 'completed')
-        code, out, err = self.t('undo')
+        self.t('undo')
         code, out, err = self.t('_get 1.status')
         self.assertEqual(out.strip(), 'pending')
 
@@ -67,6 +67,21 @@ class TestUndo(TestCase):
         code, out, err = self.t.runError("undo +tag")
         self.assertIn("The undo command does not allow further task modification.", err)
 
+
+class TestBug634(TestCase):
+    def setUp(self):
+        self.t = Task()
+
+    def test_undo_no_confirmation(self):
+        """Undo honors confirmation=off"""
+
+        self.t("add Test")
+
+        # If a prompt happens, the test will timeout on input (exitcode != 0)
+        code, out, err = self.t("rc.confirmation=off undo")
+        self.assertIn("Task removed", out)
+
+
 if __name__ == "__main__":
     from simpletap import TAPTestRunner
     unittest.main(testRunner=TAPTestRunner())