title: Could not load TestContextBootstrapper [null]
body: <p>I tried to test my classes:</p>
  
  <pre><code>@Configuration
  public class PluginConfig {
     @Bean
     public Supplier messageSupplier(){
        return () -&gt; "plugin";
     }
  
  
  @Repository
  public interface CountryRepository extends JpaRepository&lt;CountryEntity, Long&gt; {}
  </code></pre>
  
  <p>My test:</p>
  
  <pre><code>@RunWith(SpringJUnit4ClassRunner.class)
  @ContextConfigurationde
  public class PluginConfigTest {
  
  @Autowired
  private CountryRepository repository;
  
  @Test
  public void nullable() {
      assertNotNull(repository);
  }
  </code></pre>
  
  <p>And i got an exception:</p>
  
  <p>java.lang.IllegalStateException: Could not load TestContextBootstrapper [null]. Specify @BootstrapWith's 'value' attribute or make the default bootstrapper class available.</p>
  
  <pre><code>at org.springframework.test.context.BootstrapUtils.resolveTestContextBootstrapper(BootstrapUtils.java:143)
  at org.springframework.test.context.TestContextManager.&lt;init&gt;(TestContextManager.java:105)
  at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.createTestContextManager(SpringJUnit4ClassRunner.java:152)
  at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.&lt;init&gt;(SpringJUnit4ClassRunner.java:143)
  at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
  at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
  at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
  at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
  at org.junit.internal.builders.AnnotatedBuilder.buildRunner(AnnotatedBuilder.java:104)
  at org.junit.internal.builders.AnnotatedBuilder.runnerForClass(AnnotatedBuilder.java:86)
  at org.junit.runners.model.RunnerBuilder.safeRunnerForClass(RunnerBuilder.java:59)
  at org.junit.internal.builders.AllDefaultPossibilitiesBuilder.runnerForClass(AllDefaultPossibilitiesBuilder.java:26)
  at org.junit.runners.model.RunnerBuilder.safeRunnerForClass(RunnerBuilder.java:59)
  at org.junit.internal.requests.ClassRequest.getRunner(ClassRequest.java:33)
  at org.junit.internal.requests.FilterRequest.getRunner(FilterRequest.java:36)
  at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:49)
  at com.intellij.rt.execution.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:51)
  at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:237)
  at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70)
  at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
  at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
  at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
  at java.lang.reflect.Method.invoke(Method.java:498)
  at com.intellij.rt.execution.application.AppMain.main(AppMain.java:147)
  </code></pre>
  
  <p>Caused by: java.lang.NoSuchMethodError: org.springframework.core.annotation.AnnotatedElementUtils.findAllMergedAnnotations(Ljava/lang/reflect/AnnotatedElement;Ljava/lang/Class;)Ljava/util/Set;
      at org.springframework.test.context.BootstrapUtils.resolveExplicitTestContextBootstrapper(BootstrapUtils.java:150)
      at org.springframework.test.context.BootstrapUtils.resolveTestContextBootstrapper(BootstrapUtils.java:126)
      ... 23 more</p>