This test appears to trigger HTTP requests to "example.com", which may explain why it is not behaving consistently. This changes it to use an internal HTTP server to avoid unexpected behavior caused by firewalls or proxies. Signed-off-by: Aaron Lehmann <aaron.lehmann@docker.com> Upstream-commit: b483e4f09c128c2fabf82f787c0cf737c17c9c10 Component: engine