NOTE: test_verify_package_feeds (dnf_runtime.DnfSelftest)
NOTE:  ... FAIL
NOTE: ======================================================================
NOTE: FAIL: test_verify_package_feeds (dnf_runtime.DnfSelftest)
NOTE: ----------------------------------------------------------------------
NOTE: Traceback (most recent call last):
  File "/home/pokybuild/yocto-autobuilder/yocto-worker/nightly-oe-selftest/build/meta/lib/oeqa/core/decorator/__init__.py", line 32, in wrapped_f
    return func(*args, **kwargs)
  File "/home/pokybuild/yocto-autobuilder/yocto-worker/nightly-oe-selftest/build/meta-selftest/lib/oeqa/runtime/cases/dnf_runtime.py", line 40, in test_verify_package_feeds
    output_makecache = self.dnf('-vy makecache')
  File "/home/pokybuild/yocto-autobuilder/yocto-worker/nightly-oe-selftest/build/meta/lib/oeqa/runtime/cases/dnf.py", line 18, in dnf
    self.assertEqual(status, expected, message)
AssertionError: 1 != 0 : dnf -vy makecache
DNF version: 2.6.3
cachedir: /var/cache/dnf
Making cache files for all metadata files.
oe-remote-repo: has expired and will be refreshed.
Curl error (37): Couldn't read a file:// file for file:///etc/pki/packagefeed-gpg/PACKAGEFEED-GPG-KEY-2.3+snapshot-20170827 [Couldn't open file /etc/pki/packagefeed-gpg/PACKAGEFEED-GPG-KEY-2.3+snapshot-20170827]

NOTE: ----------------------------------------------------------------------
NOTE: Ran 4 tests in 2.610s
NOTE: FAILED
NOTE:  (failures=1)
Stopping logging thread
NOTE: Stopping logging thread

from https://autobuilder.yocto.io/builders/nightly-oe-selftest/builds/487/steps/Running%20oe-selftest/logs/stdio

Looks like the date may have wrapped meaning it didn't find the way? (The parent test is oe-selftest -r runtime_test.TestImage.test_testimage_dnf)