Running TestNG classes named without convention in Maven

I am developing TestNG classes in a Maven Project and executing the same. I understand the fact that ,for the maven-surefire-plugin the classname should be in either of the following formats

1. *Test.java
2. Test*.java
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3. *TestCase.java

But incase I would NOT be naming my class as per this convention , does the plugin pick up the test classes depending upon the Java MetaData , as is the case with TestNG.

If not then is defining the names of the classes in testng.xml the way out or is there some other way ??

Thanks in Advance, Vivek

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As per this documentation, you can explicitly include and exclude tests, as well as specify complex regex patterns. You could try this in lieu of maintaining a testng.xml.