Assembly for multi-project ignoring specified scope

After converting my project to a multi-project, the assembly plugin fails to filter out dependency jars that have a scope other than runtime, even when the scope in the descriptor is explicitly provided. My dep.xml -

<dependencySets>

<dependencySet>

<outputDirectory>mims-${version}/lib</outputDirectory>

<unpack>false</unpack>

<scope>runtime</scope>

</dependencySet>

</dependencySets>

I even tried putting exclude statements in the <moduleSet/> <binaries/> section, but even that doesn't work. As a result, the assembly is littered with unnecessary jars such as junit.