unit tests depends on local configuration and artifacts in local repository

My local repository contans -sources.jar for junit and servlet-api.

I then have failing tests :
testProject13(org.apache.maven.plugin.eclipse.EclipsePluginTest)
testProject22(org.apache.maven.plugin.eclipse.EclipsePluginTest)
testProject28(org.apache.maven.plugin.eclipse.EclipsePluginTest)
testProject29(org.apache.maven.plugin.eclipse.EclipsePluginTest)
testProject30(org.apache.maven.plugin.eclipse.EclipsePluginTest)
...

All of them fail beacuse the .classpath contains link to the sources archive :

Checking .classpath, line #3 expected:<...servlet-api-2.3.jar"[]/>> but was:<...servlet-api-2.3.jar"[ sourcepath="M2_REPO/javax/servlet/servlet-api/2.3/servlet-api-2.3-sources.jar"]/>>

An option would be to package with the plugin test resource a repository containing fake (0byte) artifacts, and use it as local repo with offline mode set, so that the available artifacts are fully under control.