These were originally skipped to avoid running into AppVeyor's time
limit restriction of 60 minutes. At some point the time limit was no
longer a concern to us, but the existence of long paths in the test data
prevented these tests from running successfully on Windows. Support for
long paths was added in pull requests #4256 and #4270. The host for the
test data was changed in pull request #4352 to reduce S3 transfer
charges, which hopefully means that we can now run the tests in AppVeyor
without much worry.
This concerns issue #3863.
This was exported from the AppVeyor UI, with a few modifications made to
upload the test results and throw an exception in the case of a test
failure.
Note that this overrides the settings specified in the AppVeyor UI.