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java.lang.NoClassDefFoundError: org/junit/runners/BlockJUnit4ClassRunner	at java.lang.ClassLoader.defineClass1(Native Method)	at java.lang.ClassLoader.defineClass(ClassLoader.java:800)	at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)	at java.net.URLClassLoader.defineClass(URLClassLoader.java:449)	at java.net.URLClassLoader.access$100(URLClassLoader.java:71)	at java.net.URLClassLoader$1.run(URLClassLoader.java:361)	at java.net.URLClassLoader$1.run(URLClassLoader.java:355)	at java.security.AccessController.doPrivileged(Native Method)	at java.net.URLClassLoader.findClass(URLClassLoader.java:354)	at org.codehaus.plexus.classworlds.realm.ClassRealm.loadClassFromSelf(ClassRealm.java:389)	at org.codehaus.plexus.classworlds.strategy.SelfFirstStrategy.loadClass(SelfFirstStrategy.java:42)	at org.codehaus.plexus.classworlds.realm.ClassRealm.unsynchronizedLoadClass(ClassRealm.java:259)	at org.codehaus.plexus.classworlds.realm.ClassRealm.loadClass(ClassRealm.java:235)	at org.codehaus.plexus.classworlds.realm.ClassRealm.loadClass(ClassRealm.java:227)