test_main_invalid_unicode() of test_sys displays stderr on failure
diff --git a/Lib/test/test_sys.py b/Lib/test/test_sys.py
index eb50bbb..130aa66 100644
--- a/Lib/test/test_sys.py
+++ b/Lib/test/test_sys.py
@@ -510,10 +510,9 @@
p = subprocess.Popen([sys.executable, "-c", code], stderr=subprocess.PIPE)
stdout, stderr = p.communicate()
self.assertEqual(p.returncode, 1)
- lines = stderr.splitlines()
- self.assertGreaterEqual(len(lines), 2)
- self.assertEqual(b"Unable to decode the command from the command line:", lines[0])
- self.assertIn(br"UnicodeEncodeError:", lines[1])
+ pattern = b"Unable to decode the command from the command line:"
+ if not stderr.startswith(pattern):
+ raise AssertionError("%a doesn't start with %a" % (stderr, pattern))
def test_sys_flags(self):
self.assertTrue(sys.flags)