Use #allow instead of #stub

spec/services/cache_service_spec.rb

@@ -5,7 +5,7 @@ describe CacheService do
 
   describe "#cache" do
     before do
-      rails_cache.stub(:fetch)
+      allow(rails_cache).to receive(:fetch)
     end
 
     it "provides a wrapper for basic #fetch calls to Rails.cache" do
@@ -21,7 +21,7 @@ describe CacheService do
     let(:timestamp) { Time.now.to_i }
 
     before do
-      rails_cache.stub(:fetch)
+      allow(rails_cache).to receive(:fetch)
       allow(Enterprise).to receive(:maximum).with(:updated_at).and_return(timestamp)
     end