Improve error message if the command is not decodable
diff --git a/Lib/test/test_sys.py b/Lib/test/test_sys.py
index d2f5b85..f146d71 100644
--- a/Lib/test/test_sys.py
+++ b/Lib/test/test_sys.py
@@ -509,7 +509,10 @@
p = subprocess.Popen([sys.executable, "-c", code], stderr=subprocess.PIPE)
stdout, stderr = p.communicate()
self.assertEqual(p.returncode, 1)
- self.assertIn(br"UnicodeEncodeError:", stderr)
+ 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])
def test_sys_flags(self):
self.assertTrue(sys.flags)