tests/cases/conformance/parser/ecmascript5/StrictMode/octalLiteralInStrictModeES3.ts(2,1): error TS1085: Octal literals are not available when targeting ECMAScript 5 and higher. Use the syntax '0o3'. ==== tests/cases/conformance/parser/ecmascript5/StrictMode/octalLiteralInStrictModeES3.ts (1 errors) ==== "use strict"; 03; ~~ !!! error TS1085: Octal literals are not available when targeting ECMAScript 5 and higher. Use the syntax '0o3'.