<p>윈도우에서 테스트 하시는거 같아서 답변드려요.</p>
<p>아래와 같이 바꿔서 해보세요.</p>
<div style="color: #d4d4d4; background-color: #1e1e1e; font-family: Consolas, 'Courier New', monospace; font-size: 16px; line-height: 22px; white-space: pre;">
<div>&nbsp;&nbsp;<span style="color: #9cdcfe;">"scripts"</span>:&nbsp;{</div>
<div>&nbsp;&nbsp;&nbsp;&nbsp;<span style="color: #9cdcfe;">"test"</span>:&nbsp;<span style="color: #ce9178;">"set&nbsp;NODE_ENV=test&amp;&amp;mocha&nbsp;api/user/user.spec.js"</span>,</div>
<div>&nbsp;&nbsp;&nbsp;&nbsp;<span style="color: #9cdcfe;">"start"</span>:&nbsp;<span style="color: #ce9178;">"node&nbsp;index.js"</span></div>
<div>&nbsp;},</div>
</div>

인프런 커뮤니티 질문&답변

process.env에서 NODE_ENV가 없습니다