Underlying exception : java.lang.UnsupportedOperationException: Cannot define class using reflection at org.jenkinsci.plugins.saml.OpenSamlWrapperTest.metadataWrapper(OpenSamlWrapperTest.java:62) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.base/java.lang.reflect.Method.invoke(Method.java:566) at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50) at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12) at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47) at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17) at org.jvnet.hudson.test.JenkinsRule$1.evaluate(JenkinsRule.java:548) at org.junit.internal.runners.statements.FailOnTimeout$CallableStatement.call(FailOnTimeout.java:298) at org.junit.internal.runners.statements.FailOnTimeout$CallableStatement.call(FailOnTimeout.java:292) at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264) at java.base/java.lang.Thread.run(Thread.java:834) Caused by: java.lang.UnsupportedOperationException: Cannot define class using reflection at net.bytebuddy.dynamic.loading.ClassInjector$UsingReflection$Dispatcher$Unavailable.defineClass(ClassInjector.java:821) at net.bytebuddy.dynamic.loading.ClassInjector$UsingReflection.inject(ClassInjector.java:185) at net.bytebuddy.dynamic.loading.ClassLoadingStrategy$Default$InjectionDispatcher.load(ClassLoadingStrategy.java:187) at net.bytebuddy.dynamic.TypeResolutionStrategy$Passive.initialize(TypeResolutionStrategy.java:79) at net.bytebuddy.dynamic.DynamicType$Default$Unloaded.load(DynamicType.java:4376) at org.mockito.internal.creation.bytebuddy.SubclassBytecodeGenerator.mockClass(SubclassBytecodeGenerator.java:94) at org.mockito.internal.creation.bytebuddy.TypeCachingBytecodeGenerator$1.call(TypeCachingBytecodeGenerator.java:37) at org.mockito.internal.creation.bytebuddy.TypeCachingBytecodeGenerator$1.call(TypeCachingBytecodeGenerator.java:34) at net.bytebuddy.TypeCache.findOrInsert(TypeCache.java:138) at net.bytebuddy.TypeCache$WithInlineExpunction.findOrInsert(TypeCache.java:346) at net.bytebuddy.TypeCache.findOrInsert(TypeCache.java:161) at net.bytebuddy.TypeCache$WithInlineExpunction.findOrInsert(TypeCache.java:355) at org.mockito.internal.creation.bytebuddy.TypeCachingBytecodeGenerator.mockClass(TypeCachingBytecodeGenerator.java:32) at org.mockito.internal.creation.bytebuddy.SubclassByteBuddyMockMaker.createMockType(SubclassByteBuddyMockMaker.java:71) at org.mockito.internal.creation.bytebuddy.SubclassByteBuddyMockMaker.createMock(SubclassByteBuddyMockMaker.java:42) at org.mockito.internal.creation.bytebuddy.ByteBuddyMockMaker.createMock(ByteBuddyMockMaker.java:25) at org.mockito.internal.util.MockUtil.createMock(MockUtil.java:35) at org.mockito.internal.MockitoCore.mock(MockitoCore.java:63) at org.mockito.Mockito.mock(Mockito.java:1729) at org.mockito.Mockito.mock(Mockito.java:1642) ... 14 more Caused by: java.lang.IllegalArgumentException: Unknown Java version: 11 at net.bytebuddy.ClassFileVersion.ofJavaVersion(ClassFileVersion.java:135) at net.bytebuddy.ClassFileVersion$VersionLocator$ForJava9CapableVm.locate(ClassFileVersion.java:337) at net.bytebuddy.ClassFileVersion.ofThisVm(ClassFileVersion.java:147) at net.bytebuddy.dynamic.loading.ClassInjector$UsingReflection$Dispatcher$CreationAction.run(ClassInjector.java:301) at net.bytebuddy.dynamic.loading.ClassInjector$UsingReflection$Dispatcher$CreationAction.run(ClassInjector.java:290) at java.base/java.security.AccessController.doPrivileged(Native Method) at net.bytebuddy.dynamic.loading.ClassInjector$UsingReflection.<clinit>(ClassInjector.java:70) at net.bytebuddy.dynamic.loading.ClassLoadingStrategy$Default$InjectionDispatcher.load(ClassLoadingStrategy.java:184) ... 31 more