i have this error "Can't bind to 'formControl' since it isn't a known property of 'input'." when running the test in angular6?

i have this error "Can't bind to 'formControl' since it isn't a known property of 'input'." when running the test in angular6. i have already imported FormsModule, ReactiveFormsModule in my testbed configuration i'm using angular material so i imported it to.