Gemfile in neo4j-8.1.1 vs Gemfile in neo4j-8.1.2

@@ -3,11 +3,14 @@
 gemspec
 
 # gem 'neo4j-core', github: 'neo4jrb/neo4j-core', branch: 'master' if ENV['CI']
 
 if branch = ENV['TRAVIS_BRANCH']
-  same_branch_exists = `curl --head https://github.com/neo4jrb/neo4j-core/tree/#{branch} | head -1`.match(/200 OK/)
-  gem 'neo4j-core', github: 'neo4jrb/neo4j-core', branch: same_branch_exists ? branch : 'master'
+  if `curl --head https://github.com/#{ENV['TRAVIS_REPO_SLUG']}-core/tree/#{branch} | head -1` =~ /200 OK/
+    gem 'neo4j-core', github: "#{ENV['TRAVIS_REPO_SLUG']}-core", branch:  branch
+  else
+    gem 'neo4j-core', github: 'neo4jrb/neo4j-core', branch: 'master'
+  end
 elsif ENV['USE_LOCAL_CORE']
   gem 'neo4j-core', path: '../neo4j-core'
 else
   gem 'neo4j-core'
 end