test_yaml_get_serializer failing

[pgajdos]

A test is failing in the testsuite:

[    4s] ======================================================================
[    4s] FAIL: test_yaml_get_serializer (tests.serializer.ResourceTestCase)
[    4s] ----------------------------------------------------------------------
[    4s] Traceback (most recent call last):
[    4s]   File "/home/abuild/rpmbuild/BUILD/slumber-0.7.1/tests/serializer.py", line 43, in test_yaml_get_serializer
[    4s]     self.assertEqual(result, "{foo: bar}\n")
[    4s] AssertionError: 'foo: bar\n' != '{foo: bar}\n'
[    4s] 
[    4s] ----------------------------------------------------------------------
[    4s] Ran 35 tests in 0.012s

Could you please help me understand why?

[pgajdos]

Here is the fuill build log:
https://build.opensuse.org/public/build/home:pgajdos:fail/openSUSE_Tumbleweed/x86_64/python-slumber/_log