diff --git a/.dockerignore b/.dockerignore
index 4a0352b..6fe2891 100644
--- a/.dockerignore
+++ b/.dockerignore
@@ -6,7 +6,6 @@
 !vendor/
 
 #keep these directories but nothing in them
-lib/*
 log/*
 tmp/*
 vendor/*
diff --git a/test/fixtures/cost_centre_fixture.csv b/config/cost_centre_fixture.csv
similarity index 100%
rename from test/fixtures/cost_centre_fixture.csv
rename to config/cost_centre_fixture.csv
diff --git a/config/initializers/cost_centers.rb b/config/initializers/cost_centers.rb
index db99e2d..6468a84 100644
--- a/config/initializers/cost_centers.rb
+++ b/config/initializers/cost_centers.rb
@@ -16,7 +16,7 @@ def load_from_s3(bucket, key)
 data = if ENV.has_key?('COST_CENTRE_S3_BUCKET_NAME')
   load_from_s3(ENV['COST_CENTRE_S3_BUCKET_NAME'], 'cost_centres.csv')
 else
-  File.read(File.join(Rails.root, 'test', 'fixtures', 'cost_centre_fixture.csv'))
+  File.read(File.join(Rails.root, 'config', 'cost_centre_fixture.csv'))
 end
 
 COST_CENTRES = CostCentreReader.new(data)
diff --git a/app/lib/cost_centre_reader.rb b/lib/cost_centre_reader.rb
similarity index 100%
rename from app/lib/cost_centre_reader.rb
rename to lib/cost_centre_reader.rb
diff --git a/test/lib/cost_centre_reader_test.rb b/test/lib/cost_centre_reader_test.rb
index 97f36f5..6f4165a 100644
--- a/test/lib/cost_centre_reader_test.rb
+++ b/test/lib/cost_centre_reader_test.rb
@@ -1,8 +1,9 @@
 require 'test_helper'
+require "cost_centre_reader"
 
 class CostCentreReaderTest < ActiveSupport::TestCase
   test 'we can read a cost centre CSV file' do
-    fixture_data = File.read(File.dirname(__FILE__) + "/../fixtures/cost_centre_fixture.csv")
+    fixture_data = File.read(File.join(Rails.root, 'config', 'cost_centre_fixture.csv'))
     cost_centres = CostCentreReader.new(fixture_data)
 
     cost_centre = cost_centres.get_by_cost_centre_code("12345678")
@@ -15,7 +16,7 @@ class CostCentreReaderTest < ActiveSupport::TestCase
   end
 
   test 'we return nil if no matching cost centre' do
-    fixture_data = File.read(File.dirname(__FILE__) + "/../fixtures/cost_centre_fixture.csv")
+    fixture_data = File.read(File.join(Rails.root, 'config', 'cost_centre_fixture.csv'))
     cost_centres = CostCentreReader.new(fixture_data)
 
     non_extant_code = "999999"