diff --git a/examples/customers.js b/examples/customers.js
index 718b23f..c9d58e6 100644
--- a/examples/customers.js
+++ b/examples/customers.js
@@ -7,9 +7,9 @@ const voucherify = voucherifyClient({
   clientSecretKey: '3266b9f8-e246-4f79-bdf0-833929b1380c'
 })
 
-async function scrollCustomers() {
-  for await (const customer of voucherify.customers.scroll({limit: 5})) {
-    console.log("Customer", customer)
+async function scrollCustomers () {
+  for await (const customer of voucherify.customers.scroll({ limit: 5 })) {
+    console.log('Customer', customer)
   }
 }
 
diff --git a/package.json b/package.json
index c0552da..72689d9 100644
--- a/package.json
+++ b/package.json
@@ -36,6 +36,6 @@
   },
   "scripts": {
     "test": "mocha",
-    "lint": "standard"
+    "lint": "standard --fix"
   }
 }
diff --git a/src/Customers.js b/src/Customers.js
index 603e7bf..6bfd47c 100644
--- a/src/Customers.js
+++ b/src/Customers.js
@@ -28,7 +28,7 @@ module.exports = class Customers {
   async * scroll (params = {}) {
     let startingAfter = params.starting_after
     let endingBefore = params.ending_before
-    let direction = (startingAfter || !endingBefore) ? 'desc' : 'asc'
+    const direction = (startingAfter || !endingBefore) ? 'desc' : 'asc'
 
     let response = await this.client.get('/customers', Object.assign(
       {}, params, {
@@ -39,7 +39,7 @@ module.exports = class Customers {
 
     while (true) {
       if (response.customers.length === 0) {
-        break;
+        break
       }
       for (const customer of response.customers) {
         // comparing ISOs
@@ -51,7 +51,7 @@ module.exports = class Customers {
         yield customer
       }
       if (!response.has_more) {
-        break;
+        break
       }
 
       response = await this.client.get(
diff --git a/test/customers-api.spec.js b/test/customers-api.spec.js
index 83f28aa..c2d8795 100644
--- a/test/customers-api.spec.js
+++ b/test/customers-api.spec.js
@@ -82,25 +82,26 @@ describe('Customers API', function () {
     })
   })
 
-
   describe('scroll', async function () {
     it('should scroll customers descending', async function () {
       var server = nock('https://api.voucherify.io', reqWithoutBody)
         .get('/v1/customers')
         .query({ filters: 'value', starting_after: '1970-01-01T00:00:00Z' })
-        .reply(200, {has_more: true, customers: [{created_at: '2020-01-01T00:00:00Z'}, {created_at: '2020-01-02T00:00:00Z'}]})
+        .reply(200, { has_more: true, customers: [{ created_at: '2020-01-01T00:00:00Z' }, { created_at: '2020-01-02T00:00:00Z' }] })
 
         .get('/v1/customers')
         .query({ filters: 'value', starting_after: '2020-01-02T00:00:00Z' })
-        .reply(200, {has_more: false, customers: [{created_at: '2020-01-03T00:00:00Z'}]})
-
+        .reply(200, { has_more: false, customers: [{ created_at: '2020-01-03T00:00:00Z' }] })
 
       let callCount = 0
+      const customers = []
       for await (const customer of client.customers.scroll({ filters: 'value' })) {
         ++callCount
+        customers.push(customer)
       }
 
       expect(callCount).to.equal(3)
+      expect(customers[0]).to.eql({ created_at: '2020-01-01T00:00:00Z' })
       await server.done()
     })
 
@@ -108,17 +109,20 @@ describe('Customers API', function () {
       var server = nock('https://api.voucherify.io', reqWithoutBody)
         .get('/v1/customers')
         .query({ filters: 'value', starting_after: '2019-12-31T23:59:00Z' })
-        .reply(200, {has_more: true, customers: [{created_at: '2020-01-01T00:00:00Z'}, {created_at: '2020-01-02T00:00:00Z'}]})
+        .reply(200, { has_more: true, customers: [{ created_at: '2020-01-01T00:00:00Z' }, { created_at: '2020-01-02T00:00:00Z' }] })
 
         .get('/v1/customers')
         .query({ filters: 'value', starting_after: '2020-01-02T00:00:00Z' })
-        .reply(200, {has_more: false, customers: [{created_at: '2020-01-03T00:00:00Z'}]})
+        .reply(200, { has_more: false, customers: [{ created_at: '2020-01-03T00:00:00Z' }] })
 
       let callCount = 0
+      const customers = []
       for await (const customer of client.customers.scroll({ starting_after: '2019-12-31T23:59:00Z', filters: 'value' })) {
         ++callCount
+        customers.push(customer)
       }
       expect(callCount).to.equal(3)
+      expect(customers[0]).to.eql({ created_at: '2020-01-01T00:00:00Z' })
       await server.done()
     })
 
@@ -126,45 +130,53 @@ describe('Customers API', function () {
       var server = nock('https://api.voucherify.io', reqWithoutBody)
         .get('/v1/customers')
         .query({ filters: 'value', starting_after: '2019-12-31T23:59:00Z', ending_before: '2020-12-31T23:59:00Z' })
-        .reply(200, {has_more: true, customers: [{created_at: '2020-01-01T00:00:00Z'}, {created_at: '2020-01-02T00:00:00Z'}]})
+        .reply(200, { has_more: true, customers: [{ created_at: '2020-01-01T00:00:00Z' }, { created_at: '2020-01-02T00:00:00Z' }] })
 
         .get('/v1/customers')
-        .query({ filters: 'value', starting_after: '2020-01-02T00:00:00Z', ending_before : '2020-12-31T23:59:00Z' })
-        .reply(200, {has_more: false, customers: [{created_at: '2020-01-03T00:00:00Z'}]})
+        .query({ filters: 'value', starting_after: '2020-01-02T00:00:00Z', ending_before: '2020-12-31T23:59:00Z' })
+        .reply(200, { has_more: false, customers: [{ created_at: '2020-01-03T00:00:00Z' }] })
 
       let callCount = 0
+      const customers = []
       for await (const customer of client.customers.scroll({
         starting_after: '2019-12-31T23:59:00Z',
-        ending_before : '2020-12-31T23:59:00Z',
+        ending_before: '2020-12-31T23:59:00Z',
         filters: 'value'
       })) {
         ++callCount
+        customers.push(customer)
       }
       expect(callCount).to.equal(3)
+      expect(customers[0]).to.eql({ created_at: '2020-01-01T00:00:00Z' })
       await server.done()
     })
 
     it('should scroll customers ascending', async function () {
-      let now = new Date().toISOString()
+      const now = new Date().toISOString()
       var server = nock('https://api.voucherify.io', reqWithoutBody)
         .get('/v1/customers')
         .query({ ending_before: now, filters: 'value' })
-        .reply(200, {has_more: true, customers: [
-          {created_at: '2020-01-04T00:00:00Z'},
-          {created_at: '2020-01-03T00:00:00Z'},
-          {created_at: '2020-01-02T00:00:00Z'}
-        ]})
+        .reply(200, {
+          has_more: true,
+          customers: [
+            { created_at: '2020-01-04T00:00:00Z' },
+            { created_at: '2020-01-03T00:00:00Z' },
+            { created_at: '2020-01-02T00:00:00Z' }
+          ]
+        })
         .get('/v1/customers')
         .query({ filters: 'value', ending_before: '2020-01-02T00:00:00Z' })
-        .reply(200, {has_more: false, customers: [{created_at: '2020-01-01T00:00:00Z'}]})
-
+        .reply(200, { has_more: false, customers: [{ created_at: '2020-01-01T00:00:00Z' }] })
 
       let callCount = 0
+      const customers = []
       for await (const customer of client.customers.scroll({ filters: 'value', ending_before: now })) {
         ++callCount
+        customers.push(customer)
       }
 
       expect(callCount).to.equal(4)
+      expect(customers[0]).to.eql({ created_at: '2020-01-04T00:00:00Z' })
       await server.done()
     })
   })