Zip files are not included in the test classpath

when i added a dependency that was zip file
eg <dependency>
<groupId>hsqldb</groupId>
<artifactId>hsqldb</artifactId>
<version>1.7.3.0</version>
<scope>provided</scope>
<type>zip</type>
</dependency>

this file was not included in the test classpath and so the test would not pass