diff --git a/__tests__/servers/web/web.js b/__tests__/servers/web/web.js
index 18d4b52a7..821eb8d94 100644
--- a/__tests__/servers/web/web.js
+++ b/__tests__/servers/web/web.js
@@ -710,6 +710,11 @@ describe('Server: Web', () => {
               const validRandomKeys = ['key1', 'key2', 'key3']
               const validRandomKey = validRandomKeys.indexOf(data.params.randomKey) > -1
               if (!validRandomKey) {
+                if (data.params.randomKey === 'expired-key') {
+                  const expiredError = new Error(`999: Key '${data.params.randomKey}' is expired`)
+                  expiredError.code = 999
+                  throw expiredError
+                }
                 const suspiciousError = new Error(`402: Suspicious Activity detected with key ${data.params.randomKey}`)
                 suspiciousError.code = 402
                 throw suspiciousError
@@ -803,6 +808,18 @@ describe('Server: Web', () => {
         const receivedBody = await toJson(responseWithKeyAndQuery.body)
         expect(receivedBody.good).toEqual(true)
       })
+
+      test('should not work for 999 status code set using custom error and default error code, 400 is thrown', async () => {
+        try {
+          await request.post(url + '/api/statusTestAction', { form: { key: 'value', randomKey: 'expired-key' } })
+          throw new Error('should not get here')
+        } catch (error) {
+          expect(error.statusCode).not.toEqual(999)
+          expect(error.statusCode).toEqual(400)
+          const body = await toJson(error.response.body)
+          expect(body.error).toEqual('999: Key \'expired-key\' is expired')
+        }
+      })
     })
   })
 
diff --git a/tutorials/web-server.md b/tutorials/web-server.md
index b9ea175e3..aa83e7953 100644
--- a/tutorials/web-server.md
+++ b/tutorials/web-server.md
@@ -151,8 +151,9 @@ exports['default'] = {
         },
         // When true, returnErrorCodes will modify the response header for http(s) clients if connection.error is not null.
         // You can also set connection.rawConnection.responseHttpCode to specify a code per request.
-                /**
-         *  To create custom Error objects with custom response code you need to add the your response status code in the error object eg:
+        /**
+         *  To create custom Error objects with custom response code you need to add the your response status code in the error object.
+         *  // Note: Error code in error object will overwrite the response's status code.
          *  @example
          *
          *       // Your action
@@ -173,6 +174,7 @@ exports['default'] = {
          *          }
          *          ...
          *        }
+         *        // Only the values between 100 and 599 are accepted for status code, otherwise, it will be ignored.
          *  */
         returnErrorCodes: true,
         // should this node server attempt to gzip responses if the client can accept them?