title: ClassNotFoundException: com.google.gwt.junit.server.JUnitHostImpl
body: <p>How do I get rid of this error:</p>
  
  <pre><code>java.lang.ClassNotFoundException: com.google.gwt.junit.server.JUnitHostImpl
  [ERROR]     at java.net.URLClassLoader$1.run(URLClassLoader.java:359)
  [ERROR]     at java.net.URLClassLoader$1.run(URLClassLoader.java:348)
  [ERROR]     at java.security.AccessController.doPrivileged(Native Method)
  [ERROR]     at java.net.URLClassLoader.findClass(URLClassLoader.java:347)
  [ERROR]     at java.lang.ClassLoader.loadClass(ClassLoader.java:423)
  [ERROR]     at com.google.appengine.tools.development.IsolatedAppClassLoader.loadClass(IsolatedAppClassLoader.java:213)
  </code></pre>
  
  <p>I've tried:</p>
  
  <ul>
  <li><code>mvn clean</code></li>
  <li>Eclipse project clean</li>
  </ul>
  
  <p>But still the error is there. </p>