private function duplicateTaxonomyFromPoolToTest($poolTaxonomyId)
 {
     $testTaxonomy = new ilObjTaxonomy();
     $testTaxonomy->create();
     $poolTaxonomy = new ilObjTaxonomy($poolTaxonomyId);
     $poolTaxonomy->doCloneObject($testTaxonomy, null, null);
     $poolTaxonomy->getTree()->readRootId();
     $testTaxonomy->getTree()->readRootId();
     $testTaxonomy->update();
     ilObjTaxonomy::saveUsage($testTaxonomy->getId(), $this->testOBJ->getId());
     $this->duplicatedTaxonomiesKeysMap->addDuplicatedTaxonomy($poolTaxonomy, $testTaxonomy);
 }