Each line of this test should match its style description (text-decoration-line resets text-decoration, except when the latter is set as important):

This text is underlined (also inside span).

This text is overlined (also inside span).

This text has a line-through (also inside span).

This text contains no decorations.

This text is overlined.

This text is overlined.

This text is underlined.

This text contains no decorations.

This text contains no decorations.

This text contains no decorations.

This text contains no decorations.