I'm trying to put an input, a button and a select in the same line using bootstrap/css, but the select, depending on its content size, is going to the next line, as follow. What can I do?

Here is the part of the HTML:
<div class="form-inline">
<div class="form-group">
<div class="input-group">
<input type="text" class="form-control" v-model="ClienteBusca.value" placeholder="Buscar cliente">
<span class="input-group-btn">
<button type="button" v-on:click.prevent="buscarCliente" class="btn btn-primary">Buscar</button>
</span>
</div>
</div>
<div class="form-group">
<select class="form-control" id="selectedCliente">
<option v-for="cliente in Clientes" v-bind:value="cliente">{{cliente.nome}}</option>
</select>
</div>
</div>
Also, here is the demo: https://jsfiddle.net/taianrj/r81tqbm9/1/
selectshould be nested within the sameinput-groupas the other inputs