The LinkedWiki extension depends on bordercloud/sparql. Its composer file requires php 7.1+ ( https://github.com/BorderCloud/SPARQL/issues/5 ).
Since Wikimedia CI only supports php 7.0 for now, we can't run tests from Jenkins:
+ composer install --ansi --no-progress --prefer-dist --profile -v Loading composer repositories with package information Updating dependencies (including require-dev) Dependency resolution completed in 0.012 seconds Your requirements could not be resolved to an installable set of packages. Problem 1 - Installation request for bordercloud/sparql dev-master -> satisfiable by bordercloud/sparql[dev-master]. - bordercloud/sparql dev-master requires php >=7.1 -> your PHP version (7.0.30) does not satisfy that requirement.