Gemfile in graphql-batch-0.3.10 vs Gemfile in graphql-batch-0.4.0

@@ -1,3 +1,7 @@
 source 'https://rubygems.org'
 
 gemspec
+
+if ENV["TESTING_INTERPRETER"] == "true"
+  gem "graphql", "1.9.0.pre4"
+end