Не запускается код на проверку через Gradle Tests

import org.junit.Test;

import java.lang.Object;

import static junit.framework.TestCase.assertEquals;

//import static org.junit.Assert.*;

public class CalculatorTest {

@Test
public void add() {
Calculator calc=new Calculator();
int expected=15;
int result= calc.add(10,5);
assertEquals(expected,result);
}
}

Выдает ошибку:

Execution failed for task ':test'.
> No tests found for given includes: [CalculatorTest](filter.includeTestsMatching)

* Try:
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Класс Calculator

public class Calculator {
public int add(int a,int b){
return a+b;

}
}