diff --git a/lib/active_job/queue_adapters/amazon_sqs_adapter.rb b/lib/active_job/queue_adapters/amazon_sqs_adapter.rb
index 28a9b3a2..9998d18b 100644
--- a/lib/active_job/queue_adapters/amazon_sqs_adapter.rb
+++ b/lib/active_job/queue_adapters/amazon_sqs_adapter.rb
@@ -11,6 +11,8 @@ def enqueue(job)
 
       def enqueue_at(job, timestamp)
         delay = (timestamp - Time.now.to_f).floor
+
+        delay = 0 if delay.negative?
         raise ArgumentError, 'Unable to queue a job with a delay great than 15 minutes' if delay > 15.minutes
 
         _enqueue(job, nil, delay_seconds: delay)
diff --git a/lib/generators/aws_record/base.rb b/lib/generators/aws_record/base.rb
index c7e22748..d22174b5 100644
--- a/lib/generators/aws_record/base.rb
+++ b/lib/generators/aws_record/base.rb
@@ -147,7 +147,7 @@ def parse_table_config!
           [idx.name, parse_rw_units(idx.name)]
         end.to_h
 
-        options['table_config'].each do |config, _rw_units|
+        options['table_config'].each_key do |config|
           next if config == 'primary'
 
           gsi = @gsis.select { |idx| idx.name == config }
diff --git a/test/active_job/queue_adapters/amazon_sqs_adapter_test.rb b/test/active_job/queue_adapters/amazon_sqs_adapter_test.rb
index 459c818e..b72ab5f5 100644
--- a/test/active_job/queue_adapters/amazon_sqs_adapter_test.rb
+++ b/test/active_job/queue_adapters/amazon_sqs_adapter_test.rb
@@ -144,29 +144,49 @@ module QueueAdapters
         end
       end
 
-      it 'enqueues delayed jobs' do
-        t1 = Time.now
-        allow(Time).to receive(:now).and_return t1
-
-        expect(client).to receive(:send_message).with(
-          {
-            queue_url: 'https://queue-url',
-            delay_seconds: 60,
-            message_body: instance_of(String),
-            message_attributes: instance_of(Hash)
-          }
-        )
-
-        TestJob.set(wait: 1.minute).perform_later('test')
-        sleep(0.2)
-      end
+      describe 'with queue delay' do
+        it 'enqueues jobs with proper delay' do
+          t1 = Time.now
+          allow(Time).to receive(:now).and_return t1
+
+          expect(client).to receive(:send_message).with(
+            {
+              queue_url: 'https://queue-url',
+              delay_seconds: 60,
+              message_body: instance_of(String),
+              message_attributes: instance_of(Hash)
+            }
+          )
+
+          TestJob.set(wait: 1.minute).perform_later('test')
+          sleep(0.2)
+        end
 
-      it 'raises an error when job delay is great than SQS support' do
-        t1 = Time.now
-        allow(Time).to receive(:now).and_return t1
-        expect do
-          TestJob.set(wait: 1.day).perform_later('test')
-        end.to raise_error ArgumentError
+        it 'enqueues jobs with zero or negative delay' do
+          t1 = Time.now
+          allow(Time).to receive(:now).and_return t1
+
+          expect(client).to receive(:send_message).with(
+            {
+              queue_url: 'https://queue-url',
+              delay_seconds: 0,
+              message_body: instance_of(String),
+              message_attributes: instance_of(Hash)
+            }
+          ).twice
+
+          TestJob.set(wait: 0).perform_later('test')
+          TestJob.set(wait: -1).perform_later('test')
+          sleep(0.2)
+        end
+
+        it 'raises an error when job delay is great than SQS support' do
+          t1 = Time.now
+          allow(Time).to receive(:now).and_return t1
+          expect do
+            TestJob.set(wait: 1.day).perform_later('test')
+          end.to raise_error ArgumentError
+        end
       end
     end
   end