This is a testharness.js-based test.
[FAIL] html5lib_tests18.html e4eb33f77ae641718853d2cfddbdb2eece6b266b
assert_equals: expected "#document\\n| <!DOCTYPE html>\\n| <html>\\n| <head>\\n| <body>\\n| <select>\\n| \\"X\\"" but got "#document\\n| <!DOCTYPE html>\\n| <html>\\n| <head>\\n| <body>\\n| <select>\\n| <plaintext>\\n| \\"</plaintext>X\\""
[FAIL] html5lib_tests18.html 53ce5b102579af9830bf561b634af681bbdb5dfd
assert_equals: expected "#document\\n| <!DOCTYPE html>\\n| <html>\\n| <head>\\n| <body>\\n| <select>\\n| \\"a\\"\\n| <table>\\n| <caption>\\n| \\"b\\"" but got "#document\\n| <!DOCTYPE html>\\n| <html>\\n| <head>\\n| <body>\\n| <select>\\n| <plaintext>\\n| \\"a<caption>b\\"\\n| <table>"
Harness: the test ran to completion.