java.lang.NoClassDefFoundError: junit/framework/JUnit4TestAdapterCache

Boa tarde,

Estou rodando o projeto da aula 2, customizei o build.xml com as modificações propostas só que na hora de rodar surge o seguinte erro:

Testsuite: br.com.caelum.agenda.controller.ContatosControllerTest
Tests run: 1, Failures: 0, Errors: 1, Skipped: 0, Time elapsed: 0 sec

    Caused an ERROR
junit/framework/JUnit4TestAdapterCache
java.lang.NoClassDefFoundError: junit/framework/JUnit4TestAdapterCache
    at java.lang.ClassLoader.defineClass1(Native Method)
    at java.lang.ClassLoader.defineClass(ClassLoader.java:760)
    at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
    at java.net.URLClassLoader.defineClass(URLClassLoader.java:467)
    at java.net.URLClassLoader.access$100(URLClassLoader.java:73)
    at java.net.URLClassLoader$1.run(URLClassLoader.java:368)
    at java.net.URLClassLoader$1.run(URLClassLoader.java:362)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:361)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
    at java.lang.Class.forName0(Native Method)
    at java.lang.Class.forName(Class.java:264)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:357)

Meu build.xml:

<?xml version="1.0" encoding="UTF-8"?>
<project name="agenda" default="compilar">

    <target name="limpar">
        <delete dir="build" />
        <mkdir  dir="build" />
        <mkdir  dir="build/classes" />
        <mkdir  dir="build/classes-teste" />
    </target>

    <target name="compilar" depends="limpar">
        <javac destdir="build/classes" srcdir="src">
            <classpath>
                <fileset dir="WebContent/WEB-INF/lib">
                    <include name="*.jar" />
                </fileset>
            </classpath>
        </javac>
    </target>

    <target name="compilar-teste" depends="compilar">
        <javac destdir="build/classes-teste" srcdir="src-teste" >
            <classpath>
                <pathelement location="build/classes" />

                <fileset dir="WebContent/WEB-INF/lib">
                    <include name="*.jar" />
                </fileset>

                <fileset dir="lib-teste">
                    <include name="*.jar" />
                </fileset>
            </classpath>
       </javac>
    </target>

    <target name="executar-teste" depends="compilar-teste">
        <mkdir  dir="relatorio-teste" />
        <junit haltonfailure="true" showoutput="true" printsummary="true">

            <batchtest todir="relatorio-teste">
                <formatter type="plain" />

                <fileset dir="src-teste">
                    <include name="**/*Test.java"/>
                </fileset>
            </batchtest>

            <classpath>
                <pathelement location="build/classes" />
                <pathelement location="build/classes-teste" />

                <fileset dir="WebContent/WEB-INF/lib">
                    <include name="*.jar" />
                </fileset>

                <fileset dir="lib-teste">
                    <include name="*.jar" />
                </fileset>
            </classpath>

        </junit>
    </target>

</project>

Vendo o vídeo não falhou o teste, alguém sabe o que pode estar acontecendo?