tests/cases/compiler/privateInterfaceProperties.ts(4,7): error TS2420: Class 'c1' incorrectly implements interface 'i1'. Property 'name' is private in type 'c1' but not in type 'i1'. ==== tests/cases/compiler/privateInterfaceProperties.ts (1 errors) ==== interface i1 { name:string; } // should be an error class c1 implements i1 { private name:string; } ~~ !!! error TS2420: Class 'c1' incorrectly implements interface 'i1'. !!! error TS2420: Property 'name' is private in type 'c1' but not in type 'i1'. // should be ok class c2 implements i1 { public name:string; }