带有边框的父div与边框，右边缘的间隙

Question

所以我有一个带有边框的父div中带有边框的子div。子div有3个选项卡，宽度为33.3334％。但是在子边框和父边框之间的选项卡末尾有一个小间隙。看图：

我需要摆脱这个差距，以便父母的边界是唯一可见的边界。使标签宽度更大将第3个推到下一行。

有人可以帮忙吗？

由于

    li.ui-state-default.ui-corner-top.ui-tabs-active.ui-state-active {
      background-color: #a0a3a2;
      border-top-right-radius: 5px;
    }
    li.ui-state-default.ui-corner-top {
      width: 33.3334%;
      border-right: 2px solid #a0a3a2;
      border-bottom: 2px solid #a0a3a2;
      border-top-right-radius: 5px;
    }
    #ui-id-3.ui-tabs-anchor {
      width: 33.3334%;
      border-top-right-radius: 0px!important;
    }
    .woocommerce-tabs {
      margin-bottom: 20px;
      border: 2px solid #adb0b2;
      border-radius: 5px;
      background-color: #ffffff;
      padding: 5px;
    }

<div class="wpb_tabs wpb_content_element" data-interval="0">
  <div class="wpb_wrapper wpb_tour_tabs_wrapper ui-tabs vc_clearfix ui-widget ui-widget-content ui-corner-all">
    <ul class="wpb_tabs_nav ui-tabs-nav vc_clearfix ui-helper-reset ui-helper-clearfix ui-widget-header ui-corner-all" role="tablist">
      <li class="ui-state-default ui-corner-top ui-tabs-active ui-state-active" role="tab" tabindex="0" aria-controls="tab-6f4746f8-2705-5" aria-labelledby="ui-id-1" aria-selected="true" aria-expanded="true">
        <a href="#tab-6f4746f8-2705-5" class="ui-tabs-anchor" role="presentation" tabindex="-1" id="ui-id-1">PRODUCT DETAILS</a>
      </li>
      <li class="ui-state-default ui-corner-top" role="tab" tabindex="-1" aria-controls="tab-42783517-3ace-8" aria-labelledby="ui-id-2" aria-selected="false" aria-expanded="false">
        <a href="#tab-42783517-3ace-8" class="ui-tabs-anchor" role="presentation" tabindex="-1" id="ui-id-2">DELIVERY DETAILS</a>
      </li>
      <li class="ui-state-default ui-corner-top" role="tab" tabindex="-1" aria-controls="tab-1429777272805-2-1" aria-labelledby="ui-id-3" aria-selected="false" aria-expanded="false">
        <a href="#tab-1429777272805-2-1" class="ui-tabs-anchor" role="presentation" tabindex="-1" id="ui-id-3">REVIEWS</a>
      </li>
    </ul>
  </div>
</div>