diff --git a/lib/plugins/aws/metrics/awsMetrics.test.js b/lib/plugins/aws/metrics/awsMetrics.test.js
index a99b2c11f..973fc25c6 100644
--- a/lib/plugins/aws/metrics/awsMetrics.test.js
+++ b/lib/plugins/aws/metrics/awsMetrics.test.js
@@ -460,6 +460,27 @@ describe('AwsMetrics', () => {
       });
     });
 
+    it('should display correct average of service wide average function duration', () => {
+      const metrics = [
+        [
+          {
+            Label: 'Duration',
+            Datapoints: [{ Average: 100 }, { Average: 200 }, { Average: 300 }],
+          },
+        ],
+        [
+          {
+            Label: 'Duration',
+            Datapoints: [{ Average: 400 }, { Average: 500 }],
+          },
+        ],
+      ];
+
+      return awsMetrics.showMetrics(metrics).then((message) => {
+        expect(message).to.include('Duration (avg.): 300ms');
+      });
+    });
+
     it('should display function metrics if function option is specified', () => {
       awsMetrics.options.function = 'function1';