diff --git a/config/environments/test.rb b/config/environments/test.rb
index 5848cbc22e..e1291ab4b4 100644
--- a/config/environments/test.rb
+++ b/config/environments/test.rb
@@ -1,5 +1,3 @@
-require 'open_food_network/foreign_keys_postgresql'
-
 Openfoodnetwork::Application.configure do
   # Settings specified here will take precedence over those in config/application.rb
 
diff --git a/lib/open_food_network/foreign_keys_postgresql.rb b/lib/open_food_network/foreign_keys_postgresql.rb
deleted file mode 100644
index 4a4d06fd3d..0000000000
--- a/lib/open_food_network/foreign_keys_postgresql.rb
+++ /dev/null
@@ -1,22 +0,0 @@
-# http://kopongo.com/2008/7/25/postgres-ri_constrainttrigger-error
-
-if Rails::VERSION::MAJOR < 4
-  # Fix fixtures with foreign keys, fixed in Rails 4
-
-  module ActiveRecord
-    module ConnectionAdapters
-      class PostgreSQLAdapter < AbstractAdapter
-        def disable_referential_integrity(&block)
-          transaction {
-            begin
-              execute "SET CONSTRAINTS ALL DEFERRED"
-              yield
-            ensure
-              execute "SET CONSTRAINTS ALL IMMEDIATE"
-            end
-          }
-        end
-      end
-    end
-  end
-end