title: "No tests were found" with Junit 5 and IntelliJ
body: <p><em>Q&amp;A-Style question as the existing questions don't match the simple typo I made here:</em> </p>
  
  <p><strong>Goal</strong></p>
  
  <ul>
  <li>Execute simple JUnit tests via the IntelliJ IDE using the UI (right-click: run test)</li>
  </ul>
  
  <p><strong>Problem</strong></p>
  
  <ul>
  <li>IntelliJ tells that "no tests were found"</li>
  </ul>
  
  <p><strong>Code</strong></p>
  
  <pre><code>import org.junit.jupiter.api.Test;
  
  public class Test {
      @Test
      private void testAMethod() { (...) }
  }
  
  </code></pre>