diff --git a/spec/requests/dois_spec.rb b/spec/requests/dois_spec.rb
index b87c69fef..c3853a225 100644
--- a/spec/requests/dois_spec.rb
+++ b/spec/requests/dois_spec.rb
@@ -2340,7 +2340,7 @@
         patch "/dois/#{doi.doi}", update_attributes, headers
 
         expect(json.dig('data', 'attributes', 'descriptions')).to eq(descriptions)
-        expect(json.dig('data', 'attributes', 'container')).to be nil
+        expect(json.dig('data', 'attributes', 'container')).to be_empty
       end
     end
 
@@ -2378,7 +2378,7 @@
         get "/dois/#{doi.doi}", nil, headers
 
         expect(json.dig('data', 'attributes', 'descriptions')).to eq([{"description"=>"Data from: A new malaria agent in African hominids."}])
-        expect(json.dig('data', 'attributes', 'container')).to be nil
+        expect(json.dig('data', 'attributes', 'container')).to be_empty
 
         patch "/dois/#{doi.doi}", update_attributes, headers