maven install 报错

org.apache.maven.surefire.util.SurefireReflectionException: java.lang.reflect.InvocationTargetException; nested exception is java.lang.reflect.InvocationTargetException: null
java.lang.reflect.InvocationTargetException
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:497)
at org.apache.maven.surefire.util.ReflectionUtils.invokeMethodWithArray(ReflectionUtils.java:189)
at org.apache.maven.surefire.booter.ProviderFactory$ProviderProxy.invoke(ProviderFactory.java:165)
at org.apache.maven.surefire.booter.ProviderFactory.invokeProvider(ProviderFactory.java:85)
at org.apache.maven.surefire.booter.ForkedBooter.runSuitesInProcess(ForkedBooter.java:115)
at org.apache.maven.surefire.booter.ForkedBooter.main(ForkedBooter.java:75)
Caused by: org.apache.maven.surefire.testset.TestSetFailedException: Unknown TestNG version 6.9.13.6
at org.apache.maven.surefire.testng.TestNGExecutor.getConfigurator(TestNGExecutor.java:207)
at org.apache.maven.surefire.testng.TestNGExecutor.run(TestNGExecutor.java:72)
at org.apache.maven.surefire.testng.TestNGDirectoryTestSuite.execute(TestNGDirectoryTestSuite.java:110)
at org.apache.maven.surefire.testng.TestNGProvider.invoke(TestNGProvider.java:106)
... 9 more

Results :

Tests run: 0, Failures: 0, Errors: 0, Skipped: 0

解决办法：

pom.xml 文件中添加

<build>

    <plugins>

       <plugin>

        <groupId>org.apache.maven.plugins</groupId>

        <artifactId>maven-surefire-plugin</artifactId>

        <version>2.19.1</version>

        <configuration>

        <skipTests>false</skipTests>

        </configuration>

        </plugin>

     </plugins>

</build>