The phrase "fancy-unicode" doesn't seem descriptive enough to convey that this file tests decoding of a %u-escape sequence (*). We should think of a more descriptive name.
One idea is to rename this to script-tag-with-16bit-unicode.html to convey that this test includes a 16-bit Unicode code unit . Some more verbose names include script-tag-with-unicode-escape-sequence.html and script-tag-with-16bit-unicode-escape-sequence.html.
(*) For more details on %u-escape sequences see <http://en.wikipedia.org/wiki/Percent-encoding#Non-standard_implementations> and <http://www.w3.org/International/iri-edit/draft-duerst-iri.html#anchor29>.