diff --git a/test/PhpParser/ParserTest.php b/test/PhpParser/ParserTest.php
index e8a750f..8fe5a67 100644
--- a/test/PhpParser/ParserTest.php
+++ b/test/PhpParser/ParserTest.php
@@ -157,9 +157,7 @@ EOC;
             ["b<<<'STR'\nSTR\n", ['kind' => String_::KIND_NOWDOC, 'docLabel' => 'STR']],
             ["B<<<'STR'\nSTR\n", ['kind' => String_::KIND_NOWDOC, 'docLabel' => 'STR']],
             ["<<< \t 'STR'\nSTR\n", ['kind' => String_::KIND_NOWDOC, 'docLabel' => 'STR']],
-            // HHVM doesn't support this due to a lexer bug
-            // (https://github.com/facebook/hhvm/issues/6970)
-            // array("<<<'\xff'\n\xff\n", ['kind' => String_::KIND_NOWDOC, 'docLabel' => "\xff"]),
+            ["<<<'\xff'\n\xff\n", ['kind' => String_::KIND_NOWDOC, 'docLabel' => "\xff"]],
             ["<<<\"STR\"\n\$a\nSTR\n", ['kind' => String_::KIND_HEREDOC, 'docLabel' => 'STR']],
             ["b<<<\"STR\"\n\$a\nSTR\n", ['kind' => String_::KIND_HEREDOC, 'docLabel' => 'STR']],
             ["B<<<\"STR\"\n\$a\nSTR\n", ['kind' => String_::KIND_HEREDOC, 'docLabel' => 'STR']],