• Valid
• libyaml+pyyaml
• empty-key
• allowed characters in aliases
• Bare document after document end marker
• Flow mapping keys on multiple lines
• Flow mapping/sequence value starting with a colon
• empty docs
• Tabs
• ...
• libyaml only
• Directives
• Tabs in block scalars
• ...
• pyyaml only
• Directives
• Tabs inside plain
• Tabs
• Question mark in flow
• Tags
• Invalid
• libyaml+pyyaml
• Preceding empty lines in block scalars
• Comment without space
• Hyphen in flow
• Directives
• Tabs
• Missing indent for flow
• libyaml only
• Comment without space
• Directives
• Tabs
• pyyaml only
• Tags