By default, the surefire-report plugin shows all test result status(success and failures) in the generated html. To be able to show the failures only, the property showSuccess should be set to false.
<project>
[...]
<reporting>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-surefire-report-plugin</artifactId>
<configuration>
<showSuccess>false</showSuccess>
</configuration>
</plugin>
</plugins>
</reporting>
[...]
</project>
Then execute mvn site for the report generation.
It can also be set via commandline with the standalone goal.
mvn surefire-report:report -DshowSuccess=false