diff --git a/HISTORY.md b/HISTORY.md
index e689e70de..f603896f4 100644
--- a/HISTORY.md
+++ b/HISTORY.md
@@ -6,6 +6,7 @@
 
 ### Fixed
 * Revert recent proxy changes which breaks proxy usage by @andrewdicken-stripe in https://github.com/NetSweet/netsuite/pull/579
+* Fix incompatibility with Nori v2.7+ after it removed `Object#blank?` monkey patch (#607)
 
 ### Breaking Changes
 
diff --git a/lib/netsuite/actions/delete_list.rb b/lib/netsuite/actions/delete_list.rb
index 2b42292be..1700966a6 100644
--- a/lib/netsuite/actions/delete_list.rb
+++ b/lib/netsuite/actions/delete_list.rb
@@ -53,7 +53,7 @@ def response_list
       end
 
       def success?
-        @success ||= response_errors.blank?
+        @success ||= (response_errors.nil? || response_errors.empty?)
       end
 
       def response_errors
@@ -105,4 +105,4 @@ def delete_list(options = { }, credentials={})
       end
     end
   end
-end
\ No newline at end of file
+end
diff --git a/lib/netsuite/configuration.rb b/lib/netsuite/configuration.rb
index 011509bea..427ab1318 100644
--- a/lib/netsuite/configuration.rb
+++ b/lib/netsuite/configuration.rb
@@ -202,7 +202,7 @@ def soap_header(headers = nil)
     end
 
     def auth_header(credentials={})
-      if !credentials[:consumer_key].blank? || !consumer_key.blank?
+      if !credentials[:consumer_key].to_s.empty? || !consumer_key.to_s.empty?
         token_auth(credentials)
       else
         user_auth(credentials)
diff --git a/spec/netsuite/actions/delete_list_spec.rb b/spec/netsuite/actions/delete_list_spec.rb
index 24a1d653a..7011b8f7e 100644
--- a/spec/netsuite/actions/delete_list_spec.rb
+++ b/spec/netsuite/actions/delete_list_spec.rb
@@ -76,6 +76,9 @@
 
       it 'constructs error objects' do
         response = NetSuite::Actions::DeleteList.call([klass, :list => customer_list_with_error])
+
+        expect(response).to_not be_success
+
         expect(response.errors.keys).to match_array(customer_with_error.internal_id)
         expect(response.errors[customer_with_error.internal_id].first.code).to eq('USER_EXCEPTION')
         expect(response.errors[customer_with_error.internal_id].first.message).to eq('Invalid record: type=event,id=100015,scompid=TSTDRV96')