Ant is a build tool that is widely used for building Java projects. It provides a convenient way to automate various tasks, including running tests. Here are the steps to run tests with Ant:

1. Create a test target in your Ant build file: Add a new target to your Ant build file that will execute the tests. This target should include the classpath for your project and the location of your test classes.

2. Add JUnit task to your build file: You can use the JUnit task in Ant to run your tests. This task takes several attributes, such as the name of the test class or suite, the output directory for the test results, and the format for the test results.

3. Define test dependencies: If your tests depend on other tasks or targets in your Ant build file, make sure to define those dependencies in the test target. This will ensure that the required tasks are executed before the tests are run.

4. Run the test target: Once you have defined your test target in your Ant build file, you can run it using the ant command. This will compile your project and execute the tests, generating a report of the results.

Here is an example of a test target in an Ant build file:

<target name="test" depends="compile">
    <junit printsummary="on" haltonfailure="false">
        <classpath>
            <path refid="classpath"/>
            <pathelement location="${build.test}"/>
        </classpath>
        <formatter type="plain"/>
        <batchtest todir="${test.output.dir}">
            <fileset dir="${src.test}">
                <include name="**/*Test.java"/>
            </fileset>
        </batchtest>
    </junit>
</target>

This target uses the JUnit task to run all the test classes in the src/test directory, and generates a plain text report of the test results in the test.output.dir directory.

By following these steps, you can use Ant to automate the process of running your tests, making it easier to test your Java projects and catch bugs early in the development process.