React router <NavLink> with active style doesn't work as I required with root URL

I used this NavLinks in the main menu. The issue is that when '/Test/car' link is clicked '/Test' link is also applying the styles. I believe it's because '/Test' suppose to be the root of other links. so it make sense.

But I want '/Test' link also to work like other links when applying the active style. So '/Test' will get applied the styles only when that 'Home' link is clicked. How I get that done (in a reactjs way)?

<Route exact path="/TEST" component={Home}></Route>
<Route path="/TEST/car" component={Car}></Route>
<Route path="/TEST/van" component={Van}></Route>
<Route path="/TEST/train" component={Train}></Route>

<NavLink activeStyle={{borderBottom: 'solid 3px #fff', paddingBottom: '1em'}} to="/TEST" onClick={this.closeMenuForMobile.bind(this)} >Home</NavLink>
<NavLink activeStyle={{borderBottom: 'solid 3px #fff', paddingBottom: '1em'}} to="/TEST/car" onClick={this.closeMenuForMobile.bind(this)} >Car</NavLink>
<NavLink activeStyle={{borderBottom: 'solid 3px #fff', paddingBottom: '1em'}} to="/TEST/van"  onClick={this.closeMenuForMobile.bind(this)} >Van</NavLink>
<NavLink activeStyle={{borderBottom: 'solid 3px #fff', paddingBottom: '1em'}} to="/TEST/train" onClick={this.closeMenuForMobile.bind(this)}>Train</NavLink>