ClassCastException when a GwtBootstrap Button is instanced

[Pintouch]

I'm using GwtMockito v1.1.4 for tests and I use GwtBootstrap in my project.
I'm getting this exception when I instantiate my widget :

java.lang.ClassCastException: com.google.gwt.dom.client.Text$$EnhancerByMockitoWithCGLIB$$bfd15ee6 cannot be cast to com.google.gwt.dom.client.Element
    at com.github.gwtbootstrap.client.ui.base.TextNode.setText(TextNode.java:34)
    at com.github.gwtbootstrap.client.ui.base.TextNode.<init>(TextNode.java:19)
    at com.github.gwtbootstrap.client.ui.base.IconAnchor.<init>(IconAnchor.java:75)
    at com.github.gwtbootstrap.client.ui.Button.<init>(Button.java:74)
    at com.github.gwtbootstrap.client.ui.Button.<init>(Button.java:95)
    at fr.mycompany.ga.client.ui.mainWidgets.userContent.UserContentImpl.<init>(UserContentImpl.java:52)
    at fr.mycompany.ga.client.ui.mainWidgets.userContent.UserContentTest.setUp(GreenUserContentTest.java:22)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:606)
    at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:44)
    at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)
    at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:41)
    at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:27)
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:76)
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:50)
    at org.junit.runners.ParentRunner$3.run(ParentRunner.java:193)
    at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:52)
    at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:191)
    at org.junit.runners.ParentRunner.access$000(ParentRunner.java:42)
    at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:184)
    at org.junit.runners.ParentRunner.run(ParentRunner.java:236)
    at com.google.gwtmockito.GwtMockitoTestRunner.run(GwtMockitoTestRunner.java:301)
    at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50)
    at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)

I tried using GwtMockito V 1.1.5-SNAPSHOT, but I'm getting an error related to "com.google.gwt.user.client.impl.HistoryImpl".

I'm just crating a new Button in my constructor, I'm trying to find a workaround.