Phpunit generates html coverage report for specific folder only

Using an XML file, you can include directories that you want to process and exclude those that you do not use.

<filter>
    <whitelist processUncoveredFilesFromWhitelist="true">
        <directory suffix=".class">.</directory>
        <directory suffix=".fn">.</directory>
        <directory suffix=".php">.</directory>
        <exclude>
            <directory>ExternalLibraries</directory>
        </exclude>
    </whitelist>
</filter>