1) tool_moodlenet\local\remote_resource_test::test_network_features
Failed asserting that -1 is greater than 0.

This test was added by MDL-67883, when MoodleNet was added to core. It assumes that curl_getinfo()'s download_content_length value will be greater than zero on success. However, the default test URL is http://download.moodle.org/unittest/test.html and CloudFlare does not return a Content-Length header, so curl returns -1.

The content-length of the download. This is the value read from the Content-Length: field. -1 if the size isn't known

The two options that I thought of:

1. Modify the test to accept -1 as a valid value.
2. Change the HEAD request to a GET request and return size_download instead of download_content_length.