From 465195026b5847214f72f1d21d6b8a148587744a Mon Sep 17 00:00:00 2001
From: Kovid Goyal <kovid@kovidgoyal.net>
Date: Sun, 8 Sep 2019 09:08:09 +0530
Subject: [PATCH] Better test failure messages

---
 src/calibre/test_build.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/calibre/test_build.py b/src/calibre/test_build.py
index ab4b623d02..828244173e 100644
--- a/src/calibre/test_build.py
+++ b/src/calibre/test_build.py
@@ -230,8 +230,8 @@ class BuildTest(unittest.TestCase):
         p.printToPdf(print_callback)
         QTimer.singleShot(5000, lambda: QApplication.instance().quit())
         QApplication.instance().exec_()
-        self.assertEqual(callback.result, 2)
-        self.assertIn(b'Skia/PDF', bytes(print_callback.result))
+        self.assertEqual(callback.result, 2, 'Simple JS computation failed')
+        self.assertIn(b'Skia/PDF', bytes(print_callback.result), 'Print to PDF failed')
         del p
         del na
         destroy_app()