tests/cases/compiler/genericTypeUsedWithoutTypeArguments1.ts(2,25): error TS2314: Generic type 'Foo' requires 1 type argument(s). ==== tests/cases/compiler/genericTypeUsedWithoutTypeArguments1.ts (1 errors) ==== interface Foo { } class Bar implements Foo { } ~~~ !!! error TS2314: Generic type 'Foo' requires 1 type argument(s).