diff -r 98376cf9133d Lib/test/test_http_cookiejar.py
--- a/Lib/test/test_http_cookiejar.py	Tue Jan 06 22:16:10 2015 -0800
+++ b/Lib/test/test_http_cookiejar.py	Wed Jan 07 14:55:00 2015 +0100
@@ -1578,6 +1578,30 @@
         self.assertEqual(len(new_c), 4)  # 2 of them discarded on save
         self.assertIn("name='foo1', value='bar'", repr(new_c))
 
+        # Check compatibility with curl / wget cookiejar format.
+        try:
+            expires = int(time.time() + 3600)
+            with open(filename, "w") as f:
+                f.write(MozillaCookieJar.header)
+                f.write("www.foo.com\tFALSE\t/\tFALSE\t%u\tfoo1\tbar\n" %
+                        expires)
+                f.write("www.foo.com\tFALSE\t/\tFALSE\t0\tfoo2\tbar\n")
+                f.write("www.foo.com\tFALSE\t/\tFALSE\t\tfoo3\tbar\n")
+            c = MozillaCookieJar()
+            c.revert(filename)
+            self.assertEqual(len(c), 1)
+            c.revert(filename, ignore_discard = True)
+            self.assertEqual(len(c), 3)
+            c.save(filename, ignore_discard = True)
+            with open(filename, "r") as f:
+                for line in f:
+                    if line == '\n' or line.startswith('#'):
+                        continue
+                    self.assertRegex(line.split('\t')[4], '^\d+$')
+        finally:
+            try: os.unlink(filename)
+            except OSError: pass
+
     def test_netscape_misc(self):
         # Some additional Netscape cookies tests.
         c = CookieJar()