[layer-import-parsing.html]
  [@import url("nonexist.css") layer; should be a valid layered import rule]
    expected: FAIL

  [@import url("nonexist.css") layer(A); should be a valid layered import rule]
    expected: FAIL

  [@import url("nonexist.css") layer(A.B); should be a valid layered import rule]
    expected: FAIL

  [@import url(nonexist.css) layer; should be a valid layered import rule]
    expected: FAIL

  [@import url(nonexist.css) layer(A); should be a valid layered import rule]
    expected: FAIL

  [@import url(nonexist.css) layer(A.B); should be a valid layered import rule]
    expected: FAIL

  [@import "nonexist.css" layer; should be a valid layered import rule]
    expected: FAIL

  [@import "nonexist.css" layer(A); should be a valid layered import rule]
    expected: FAIL

  [@import "nonexist.css" layer(A.B); should be a valid layered import rule]
    expected: FAIL

  [@import url("nonexist.css") layer(); should still be a valid import rule with an invalid layer declaration]
    expected: FAIL

  [@import url("nonexist.css") layer(A B); should still be a valid import rule with an invalid layer declaration]
    expected: FAIL

  [@import url("nonexist.css") layer(A . B); should still be a valid import rule with an invalid layer declaration]
    expected: FAIL

  [@import url("nonexist.css") layer(A, B, C); should still be a valid import rule with an invalid layer declaration]
    expected: FAIL