old_contents: export default function(server) {
      server.loadFixtures('categories');
      server.loadFixtures('crates');
      server.loadFixtures('dependencies');
      server.loadFixtures('keywords');
      server.loadFixtures('teams');
      server.loadFixtures('users');
      server.loadFixtures('version-downloads');
      server.loadFixtures('versions');
  }
  
new_contents: export default function(server) {
      server.loadFixtures();
  }
  
subject: Merge loadFixture() calls