diff --git a/known_failures.txt b/known_failures.txt
index 027ceff..c5efa24 100644
--- a/known_failures.txt
+++ b/known_failures.txt
@@ -10,3 +10,108 @@ non262/Date/time-zones-imported.js
 non262/Date/time-zones-historic.js
 non262/Date/toString-localized-posix.js
 non262/Date/time-zone-path.js
+REGRESSIONS
+test262/built-ins/RegExp/property-escapes/generated/Script_-_Kannada.js
+test262/built-ins/RegExp/property-escapes/generated/General_Category_-_Close_Punctuation.js
+test262/built-ins/RegExp/property-escapes/generated/General_Category_-_Other_Punctuation.js
+test262/built-ins/RegExp/property-escapes/generated/Script_Extensions_-_Brahmi.js
+test262/built-ins/RegExp/property-escapes/generated/General_Category_-_Other.js
+test262/built-ins/RegExp/property-escapes/generated/ID_Continue.js
+test262/built-ins/RegExp/property-escapes/generated/Script_-_Han.js
+test262/built-ins/RegExp/property-escapes/generated/Bidi_Mirrored.js
+test262/built-ins/RegExp/property-escapes/generated/Script_Extensions_-_Kannada.js
+test262/built-ins/RegExp/property-escapes/generated/General_Category_-_Open_Punctuation.js
+test262/built-ins/RegExp/property-escapes/generated/Script_Extensions_-_Glagolitic.js
+test262/built-ins/RegExp/property-escapes/generated/Emoji_Presentation.js
+test262/built-ins/RegExp/property-escapes/generated/Uppercase.js
+test262/built-ins/RegExp/property-escapes/generated/Terminal_Punctuation.js
+test262/built-ins/RegExp/property-escapes/generated/General_Category_-_Unassigned.js
+test262/built-ins/RegExp/property-escapes/generated/Alphabetic.js
+test262/built-ins/RegExp/property-escapes/generated/Changes_When_Casefolded.js
+test262/built-ins/RegExp/property-escapes/generated/Script_Extensions_-_Tagalog.js
+test262/built-ins/RegExp/property-escapes/generated/Cased.js
+test262/built-ins/RegExp/property-escapes/generated/Emoji.js
+test262/built-ins/RegExp/property-escapes/generated/Diacritic.js
+test262/built-ins/RegExp/property-escapes/generated/ID_Start.js
+test262/built-ins/RegExp/property-escapes/generated/Script_Extensions_-_Latin.js
+test262/built-ins/RegExp/property-escapes/generated/Script_-_Inherited.js
+test262/built-ins/RegExp/property-escapes/generated/Script_Extensions_-_Mongolian.js
+test262/built-ins/RegExp/property-escapes/generated/Grapheme_Base.js
+test262/built-ins/RegExp/property-escapes/generated/Script_Extensions_-_Balinese.js
+test262/built-ins/RegExp/property-escapes/generated/Script_-_Takri.js
+test262/built-ins/RegExp/property-escapes/generated/General_Category_-_Cased_Letter.js
+test262/built-ins/RegExp/property-escapes/generated/General_Category_-_Modifier_Symbol.js
+test262/built-ins/RegExp/property-escapes/generated/Lowercase.js
+test262/built-ins/RegExp/property-escapes/generated/Dash.js
+test262/built-ins/RegExp/property-escapes/generated/General_Category_-_Lowercase_Letter.js
+test262/built-ins/RegExp/property-escapes/generated/Changes_When_Casemapped.js
+test262/built-ins/RegExp/property-escapes/generated/Script_-_Balinese.js
+test262/built-ins/RegExp/property-escapes/generated/Sentence_Terminal.js
+test262/built-ins/RegExp/property-escapes/generated/Script_Extensions_-_Adlam.js
+test262/built-ins/RegExp/property-escapes/generated/Emoji_Modifier_Base.js
+test262/built-ins/RegExp/property-escapes/generated/XID_Start.js
+test262/built-ins/RegExp/property-escapes/generated/Assigned.js
+test262/built-ins/RegExp/property-escapes/generated/Script_Extensions_-_Telugu.js
+test262/built-ins/RegExp/property-escapes/generated/General_Category_-_Currency_Symbol.js
+test262/built-ins/RegExp/property-escapes/generated/Script_Extensions_-_Canadian_Aboriginal.js
+test262/built-ins/RegExp/property-escapes/generated/Script_-_Ethiopic.js
+test262/built-ins/RegExp/property-escapes/generated/Script_Extensions_-_Han.js
+test262/built-ins/RegExp/property-escapes/generated/General_Category_-_Number.js
+test262/built-ins/RegExp/property-escapes/generated/General_Category_-_Decimal_Number.js
+test262/built-ins/RegExp/property-escapes/generated/Script_-_Ahom.js
+test262/built-ins/RegExp/property-escapes/generated/XID_Continue.js
+test262/built-ins/RegExp/property-escapes/generated/Script_-_Canadian_Aboriginal.js
+test262/built-ins/RegExp/property-escapes/generated/Script_Extensions_-_Syriac.js
+test262/built-ins/RegExp/property-escapes/generated/General_Category_-_Dash_Punctuation.js
+test262/built-ins/RegExp/property-escapes/generated/Script_-_Hiragana.js
+test262/built-ins/RegExp/property-escapes/generated/Script_-_Common.js
+test262/built-ins/RegExp/property-escapes/generated/Changes_When_NFKC_Casefolded.js
+test262/built-ins/RegExp/property-escapes/generated/General_Category_-_Nonspacing_Mark.js
+test262/built-ins/RegExp/property-escapes/generated/Script_Extensions_-_Kaithi.js
+test262/built-ins/RegExp/property-escapes/generated/Changes_When_Uppercased.js
+test262/built-ins/RegExp/property-escapes/generated/Changes_When_Titlecased.js
+test262/built-ins/RegExp/property-escapes/generated/Script_-_Tagalog.js
+test262/built-ins/RegExp/property-escapes/generated/Script_Extensions_-_Common.js
+test262/built-ins/RegExp/property-escapes/generated/General_Category_-_Other_Symbol.js
+test262/built-ins/RegExp/property-escapes/generated/Grapheme_Extend.js
+test262/built-ins/RegExp/property-escapes/generated/General_Category_-_Punctuation.js
+test262/built-ins/RegExp/property-escapes/generated/Script_Extensions_-_Arabic.js
+test262/built-ins/RegExp/property-escapes/generated/Script_Extensions_-_Ahom.js
+test262/built-ins/RegExp/property-escapes/generated/General_Category_-_Letter.js
+test262/built-ins/RegExp/property-escapes/generated/Script_Extensions_-_Inherited.js
+test262/built-ins/RegExp/property-escapes/generated/Case_Ignorable.js
+test262/built-ins/RegExp/property-escapes/generated/General_Category_-_Uppercase_Letter.js
+test262/built-ins/RegExp/property-escapes/generated/Script_Extensions_-_Hiragana.js
+test262/built-ins/RegExp/property-escapes/generated/Script_-_Glagolitic.js
+test262/built-ins/RegExp/property-escapes/generated/General_Category_-_Mark.js
+test262/built-ins/RegExp/property-escapes/generated/Ideographic.js
+test262/built-ins/RegExp/property-escapes/generated/General_Category_-_Modifier_Letter.js
+test262/built-ins/RegExp/property-escapes/generated/Script_-_Kaithi.js
+test262/built-ins/RegExp/property-escapes/generated/Unified_Ideograph.js
+test262/built-ins/RegExp/property-escapes/generated/Script_Extensions_-_Ethiopic.js
+test262/built-ins/RegExp/property-escapes/generated/Script_-_Mongolian.js
+test262/built-ins/RegExp/property-escapes/generated/Script_-_Telugu.js
+test262/built-ins/RegExp/property-escapes/generated/Script_-_Katakana.js
+test262/built-ins/RegExp/property-escapes/generated/Soft_Dotted.js
+test262/built-ins/RegExp/property-escapes/generated/Extender.js
+test262/built-ins/RegExp/property-escapes/generated/Script_-_Latin.js
+test262/built-ins/RegExp/property-escapes/generated/General_Category_-_Format.js
+test262/built-ins/RegExp/property-escapes/generated/General_Category_-_Other_Letter.js
+test262/built-ins/RegExp/property-escapes/generated/Script_Extensions_-_Katakana.js
+test262/built-ins/RegExp/property-escapes/generated/Script_-_Brahmi.js
+test262/built-ins/RegExp/property-escapes/generated/General_Category_-_Symbol.js
+test262/built-ins/RegExp/property-escapes/generated/Script_Extensions_-_Nko.js
+test262/built-ins/RegExp/property-escapes/generated/Default_Ignorable_Code_Point.js
+test262/built-ins/RegExp/property-escapes/generated/General_Category_-_Spacing_Mark.js
+test262/built-ins/RegExp/property-escapes/generated/Variation_Selector.js
+test262/built-ins/RegExp/property-escapes/generated/Changes_When_Lowercased.js
+test262/built-ins/RegExp/property-escapes/generated/Script_-_Arabic.js
+test262/built-ins/RegExp/property-escapes/generated/Script_Extensions_-_Takri.js
+non262/Intl/Locale/likely-subtags-generated.js
+non262/Intl/DateTimeFormat/japanese-gannen-year.js
+non262/Intl/DateTimeFormat/related-year.js
+non262/Intl/DateTimeFormat/extended-time-zone-names.js
+non262/Intl/DateTimeFormat/implied-script-has-consistent-output.js
+non262/Intl/Date/toLocaleTimeString_timeZone.js
+non262/Intl/Date/toLocaleString_timeZone.js
+non262/Intl/Date/toLocaleDateString_timeZone.js