Description Jimmy Praet 2021-07-07 10:21:47 EDT

When launching a unit test of a project that is configured with execution environment < JavaSE-1.8 (JavaSE-1.7 in my case), I get this error:

Exception in thread "main" java.lang.UnsupportedClassVersionError: JVMCFRE003 bad major version; class=org/eclipse/jdt/internal/junit/runner/RemoteTestRunner, offset=6
	at java.lang.ClassLoader.defineClassImpl(Native Method)
	at java.lang.ClassLoader.defineClass(ClassLoader.java:324)
	at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:155)
	at java.net.URLClassLoader.defineClass(URLClassLoader.java:712)
	at java.net.URLClassLoader.access$400(URLClassLoader.java:93)
	at java.net.URLClassLoader$ClassFinder.run(URLClassLoader.java:1164)
	at java.security.AccessController.doPrivileged(AccessController.java:456)
	at java.net.URLClassLoader.findClass(URLClassLoader.java:595)
	at java.lang.ClassLoader.loadClassHelper(ClassLoader.java:777)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:750)
	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:326)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:731)
	at sun.launcher.LauncherHelper.checkAndLoadMain(LauncherHelper.java:495)

Reason: org.eclipse.jdt.junit.runtime_3.6.0 has been compiled with Java 8.
Previous version org.eclipse.jdt.junit.runtime_3.5.0 was compiled with Java 5.