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java.lang.IncompatibleClassChangeError: seppo0010.espressotest.MainActivity	at dalvik.system.DexFile.defineClassNative(Native Method)	at dalvik.system.DexFile.defineClass(DexFile.java:226)	at dalvik.system.DexFile.loadClassBinaryName(DexFile.java:219)	at dalvik.system.DexPathList.findClass(DexPathList.java:321)	at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:54)	at java.lang.ClassLoader.loadClass(ClassLoader.java:511)	at java.lang.ClassLoader.loadClass(ClassLoader.java:469)	at seppo0010.espressotest.MainActivityTest.(MainActivityTest.java:18)	at java.lang.reflect.Constructor.newInstance(Native Method)	at java.lang.reflect.Constructor.newInstance(Constructor.java:288)	at org.junit.runners.BlockJUnit4ClassRunner.createTest(BlockJUnit4ClassRunner.java:217)	at org.junit.runners.BlockJUnit4ClassRunner$1.runReflectiveCall(BlockJUnit4ClassRunner.java:266)	at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)	at org.junit.runners.BlockJUnit4ClassRunner.methodBlock(BlockJUnit4ClassRunner.java:263)	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)	at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)	at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)	at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)	at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)	at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)	at org.junit.runners.ParentRunner.run(ParentRunner.java:363)	at org.junit.runners.Suite.runChild(Suite.java:128)	at org.junit.runners.Suite.runChild(Suite.java:27)	at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)	at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)	at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)	at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)	at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)	at org.junit.runners.ParentRunner.run(ParentRunner.java:363)	at org.junit.runner.JUnitCore.run(JUnitCore.java:137)	at org.junit.runner.JUnitCore.run(JUnitCore.java:115)	at android.support.test.internal.runner.TestExecutor.execute(TestExecutor.java:54)	at android.support.test.runner.AndroidJUnitRunner.onStart(AndroidJUnitRunner.java:228)	at android.app.Instrumentation$InstrumentationThread.run(Instrumentation.java:1853)