testng.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE suite SYSTEM "http://testng.org/testng-1.0.dtd">
<suite name="Login Suite" thread-count="2" parallel="classes">
    <test preserve-order="true" name="Login Success/Failure and Logout - Firefox">
        <parameter name="browser" value="firefox"/>
        <classes>
            <class name="tests.TestLoginSuccessToMainPage"/>
            <class name="tests.TestLoginFailureToMainPage"/>
        </classes>
    </test>
    <test preserve-order="true" name="Login Success/Failure and Logout - Chrome">
        <parameter name="browser" value="chrome"/>
        <classes>
            <class name="tests.TestLoginSuccessToMainPage" />
            <class name="tests.TestLoginFailureToMainPage" />
        </classes>
    </test>
</suite>