I started migrating a maven project from Java 8 to Java 11, using modularity (Jigsaw). This project uses the package shrinkwrap-resolver-api for tests. shrinkwrap-resolver-api is declared in the dependencies in the pom.xml, and I added "requires shrinkwrap.resolver.api;" in my module-info.java. With other dependencies, this works, but not with shrinkwrap. Maybe the module-info.java file is missing in the jar shrinkwrap.resolver.api ?