diff --git a/erpnext/selling/page/point_of_sale/point_of_sale.js b/erpnext/selling/page/point_of_sale/point_of_sale.js
index 6bbb267..0e6ecdd 100644
--- a/erpnext/selling/page/point_of_sale/point_of_sale.js
+++ b/erpnext/selling/page/point_of_sale/point_of_sale.js
@@ -507,8 +507,10 @@
 			df: {
 				fieldtype: 'Link',
 				label: 'Customer',
+				fieldname: 'customer',
 				options: 'Customer',
 				reqd: 1,
+				default: this.frm.doc.customer,
 				onchange: () => {
 					this.events.on_customer_change(this.customer_field.get_value());
 				}
diff --git a/erpnext/selling/page/point_of_sale/test_point_of_sale.js b/erpnext/selling/page/point_of_sale/test_point_of_sale.js
new file mode 100644
index 0000000..a178e5c
--- /dev/null
+++ b/erpnext/selling/page/point_of_sale/test_point_of_sale.js
@@ -0,0 +1,38 @@
+QUnit.test("test:Point of Sales", function(assert) {
+	assert.expect(1);
+	let done = assert.async();
+
+	frappe.run_serially([
+		() => frappe.set_route('point-of-sale'),
+		() => frappe.timeout(2),
+		() => frappe.set_control('customer', 'Test Customer'),
+		() => frappe.timeout(0.2),
+		() => cur_frm.set_value('customer', 'Test Customer'),
+		() => frappe.timeout(2),
+		() => frappe.click_link('Test FG Item 2'),
+		() => frappe.timeout(0.2),
+		() => frappe.click_element(`.cart-items [title="_Test FG Item 2"]`),
+		() => frappe.timeout(0.2),
+		() => frappe.click_element(`.number-pad [data-value="Rate"]`),
+		() => frappe.timeout(0.2),
+		() => frappe.click_element(`.number-pad [data-value="2"]`),
+		() => frappe.timeout(0.2),
+		() => frappe.click_element(`.number-pad [data-value="5"]`),
+		() => frappe.timeout(0.2),
+		() => frappe.click_element(`.number-pad [data-value="0"]`),
+		() => frappe.timeout(0.2),
+		() => frappe.click_element(`.number-pad [data-value="Pay"]`),
+		() => frappe.timeout(0.2),
+		() => frappe.click_element(`.frappe-control [data-value="4"]`),
+		() => frappe.timeout(0.2),
+		() => frappe.click_element(`.frappe-control [data-value="5"]`),
+		() => frappe.timeout(0.2),
+		() => frappe.click_element(`.frappe-control [data-value="0"]`),
+		() => frappe.timeout(0.2),
+		() => frappe.click_button('Submit'),
+		() => frappe.click_button('Yes'),
+		() => frappe.timeout(5),
+		() => assert.ok(cur_frm.doc.docstatus==1, "Sales invoice created successfully"),
+		() => done()
+	]);
+});
\ No newline at end of file
diff --git a/erpnext/tests/ui/tests.txt b/erpnext/tests/ui/tests.txt
index 653aeec..e76c67e 100644
--- a/erpnext/tests/ui/tests.txt
+++ b/erpnext/tests/ui/tests.txt
@@ -50,6 +50,7 @@
 erpnext/schools/doctype/instructor/test_instructor.js
 erpnext/stock/doctype/warehouse/test_warehouse.js
 erpnext/manufacturing/doctype/production_order/test_production_order.js #long
+erpnext/selling/page/point_of_sale/test_point_of_sale.js
 erpnext/accounts/page/pos/test_pos.js
 erpnext/selling/doctype/product_bundle/test_product_bundle.js
 erpnext/stock/doctype/delivery_note/test_delivery_note.js