diff --git a/erpnext/accounts/doctype/sales_invoice/test_sales_invoice.py b/erpnext/accounts/doctype/sales_invoice/test_sales_invoice.py
index 2692465..df2cc29 100644
--- a/erpnext/accounts/doctype/sales_invoice/test_sales_invoice.py
+++ b/erpnext/accounts/doctype/sales_invoice/test_sales_invoice.py
@@ -1058,6 +1058,7 @@
 		serial_no = frappe.get_doc({
 			"doctype": "Serial No",
 			"item_code": "_Test Serialized Item With Series",
+			"company": "Wind Power LLC",
 			"serial_no": make_autoname("SR", "Serial No")
 		})
 		serial_no.save()
diff --git a/erpnext/accounts/doctype/subscription/test_subscription.py b/erpnext/accounts/doctype/subscription/test_subscription.py
index 3d96f23..a0784e6 100644
--- a/erpnext/accounts/doctype/subscription/test_subscription.py
+++ b/erpnext/accounts/doctype/subscription/test_subscription.py
@@ -101,6 +101,7 @@
 		subscription.delete()
 
 	def test_invoice_is_generated_at_end_of_billing_period(self):
+		frappe.db.set_value("Global Defaults", None, "default_company", "_Test Company")
 		subscription = frappe.new_doc('Subscription')
 		subscription.customer = '_Test Customer'
 		subscription.start = '2018-01-01'
@@ -116,8 +117,10 @@
 		self.assertEqual(subscription.current_invoice_start, '2018-01-01')
 		self.assertEqual(subscription.status, 'Past Due Date')
 		subscription.delete()
+		frappe.db.set_value("Global Defaults", None, "default_company", None)
 
 	def test_status_goes_back_to_active_after_invoice_is_paid(self):
+		frappe.db.set_value("Global Defaults", None, "default_company", "_Test Company")
 		subscription = frappe.new_doc('Subscription')
 		subscription.customer = '_Test Customer'
 		subscription.append('plans', {'plan': '_Test Plan Name', 'qty': 1})
@@ -141,8 +144,10 @@
 		self.assertEqual(len(subscription.invoices), 1)
 
 		subscription.delete()
+		frappe.db.set_value("Global Defaults", None, "default_company", None)
 
 	def test_subscription_cancel_after_grace_period(self):
+		frappe.db.set_value("Global Defaults", None, "default_company", "_Test Company")
 		settings = frappe.get_single('Subscription Settings')
 		default_grace_period_action = settings.cancel_after_grace
 		settings.cancel_after_grace = 1
@@ -164,8 +169,11 @@
 		settings.cancel_after_grace = default_grace_period_action
 		settings.save()
 		subscription.delete()
+		frappe.db.set_value("Global Defaults", None, "default_company", None)
 
 	def test_subscription_unpaid_after_grace_period(self):
+		frappe.db.set_value("Global Defaults", None, "default_company", "_Test Company")
+
 		settings = frappe.get_single('Subscription Settings')
 		default_grace_period_action = settings.cancel_after_grace
 		settings.cancel_after_grace = 0
@@ -187,8 +195,11 @@
 		settings.cancel_after_grace = default_grace_period_action
 		settings.save()
 		subscription.delete()
+		frappe.db.set_value("Global Defaults", None, "default_company", None)
 
 	def test_subscription_invoice_days_until_due(self):
+		frappe.db.set_value("Global Defaults", None, "default_company", "_Test Company")
+
 		subscription = frappe.new_doc('Subscription')
 		subscription.customer = '_Test Customer'
 		subscription.append('plans', {'plan': '_Test Plan Name', 'qty': 1})
@@ -200,8 +211,11 @@
 		self.assertEqual(subscription.status, 'Active')
 
 		subscription.delete()
+		frappe.db.set_value("Global Defaults", None, "default_company", None)
 
 	def test_subscription_is_past_due_doesnt_change_within_grace_period(self):
+		frappe.db.set_value("Global Defaults", None, "default_company", "_Test Company")
+
 		settings = frappe.get_single('Subscription Settings')
 		grace_period = settings.grace_period
 		settings.grace_period = 1000
@@ -229,6 +243,7 @@
 		settings.grace_period = grace_period
 		settings.save()
 		subscription.delete()
+		frappe.db.set_value("Global Defaults", None, "default_company", None)
 
 	def test_subscription_remains_active_during_invoice_period(self):
 		subscription = frappe.new_doc('Subscription')
@@ -257,6 +272,7 @@
 		subscription.delete()
 
 	def test_subscription_cancelation(self):
+		frappe.db.set_value("Global Defaults", None, "default_company", "_Test Company")
 		subscription = frappe.new_doc('Subscription')
 		subscription.customer = '_Test Customer'
 		subscription.append('plans', {'plan': '_Test Plan Name', 'qty': 1})
@@ -266,8 +282,10 @@
 		self.assertEqual(subscription.status, 'Cancelled')
 
 		subscription.delete()
+		frappe.db.set_value("Global Defaults", None, "default_company", None)
 
 	def test_subscription_cancellation_invoices(self):
+		frappe.db.set_value("Global Defaults", None, "default_company", "_Test Company")
 		settings = frappe.get_single('Subscription Settings')
 		to_prorate = settings.prorate
 		settings.prorate = 1
@@ -301,8 +319,11 @@
 		subscription.delete()
 		settings.prorate = to_prorate
 		settings.save()
+		frappe.db.set_value("Global Defaults", None, "default_company", None)
 
 	def test_subscription_cancellation_invoices_with_prorata_false(self):
+		frappe.db.set_value("Global Defaults", None, "default_company", "_Test Company")
+
 		settings = frappe.get_single('Subscription Settings')
 		to_prorate = settings.prorate
 		settings.prorate = 0
@@ -321,8 +342,11 @@
 		settings.save()
 
 		subscription.delete()
+		frappe.db.set_value("Global Defaults", None, "default_company", None)
 
 	def test_subscription_cancellation_invoices_with_prorata_true(self):
+		frappe.db.set_value("Global Defaults", None, "default_company", "_Test Company")
+
 		settings = frappe.get_single('Subscription Settings')
 		to_prorate = settings.prorate
 		settings.prorate = 1
@@ -345,8 +369,10 @@
 		settings.save()
 
 		subscription.delete()
+		frappe.db.set_value("Global Defaults", None, "default_company", None)
 
 	def test_subcription_cancellation_and_process(self):
+		frappe.db.set_value("Global Defaults", None, "default_company", "_Test Company")
 		settings = frappe.get_single('Subscription Settings')
 		default_grace_period_action = settings.cancel_after_grace
 		settings.cancel_after_grace = 1
@@ -378,8 +404,11 @@
 		settings.cancel_after_grace = default_grace_period_action
 		settings.save()
 		subscription.delete()
+		frappe.db.set_value("Global Defaults", None, "default_company", None)
 
 	def test_subscription_restart_and_process(self):
+		frappe.db.set_value("Global Defaults", None, "default_company", "_Test Company")
+
 		settings = frappe.get_single('Subscription Settings')
 		default_grace_period_action = settings.cancel_after_grace
 		settings.grace_period = 0
@@ -416,8 +445,11 @@
 		settings.cancel_after_grace = default_grace_period_action
 		settings.save()
 		subscription.delete()
+		frappe.db.set_value("Global Defaults", None, "default_company", None)
 
 	def test_subscription_unpaid_back_to_active(self):
+		frappe.db.set_value("Global Defaults", None, "default_company", "_Test Company")
+
 		settings = frappe.get_single('Subscription Settings')
 		default_grace_period_action = settings.cancel_after_grace
 		settings.cancel_after_grace = 0
@@ -450,6 +482,7 @@
 		settings.cancel_after_grace = default_grace_period_action
 		settings.save()
 		subscription.delete()
+		frappe.db.set_value("Global Defaults", None, "default_company", None)
 
 	def test_restart_active_subscription(self):
 		subscription = frappe.new_doc('Subscription')
@@ -462,6 +495,8 @@
 		subscription.delete()
 
 	def test_subscription_invoice_discount_percentage(self):
+		frappe.db.set_value("Global Defaults", None, "default_company", "_Test Company")
+
 		subscription = frappe.new_doc('Subscription')
 		subscription.customer = '_Test Customer'
 		subscription.additional_discount_percentage = 10
@@ -475,8 +510,11 @@
 		self.assertEqual(invoice.apply_discount_on, 'Grand Total')
 
 		subscription.delete()
+		frappe.db.set_value("Global Defaults", None, "default_company", None)
 
 	def test_subscription_invoice_discount_amount(self):
+		frappe.db.set_value("Global Defaults", None, "default_company", "_Test Company")
+
 		subscription = frappe.new_doc('Subscription')
 		subscription.customer = '_Test Customer'
 		subscription.additional_discount_amount = 11
@@ -490,10 +528,12 @@
 		self.assertEqual(invoice.apply_discount_on, 'Grand Total')
 
 		subscription.delete()
+		frappe.db.set_value("Global Defaults", None, "default_company", None)
 
 	def test_prepaid_subscriptions(self):
 		# Create a non pre-billed subscription, processing should not create
 		# invoices.
+		frappe.db.set_value("Global Defaults", None, "default_company", "_Test Company")
 		subscription = frappe.new_doc('Subscription')
 		subscription.customer = '_Test Customer'
 		subscription.append('plans', {'plan': '_Test Plan Name', 'qty': 1})
@@ -509,8 +549,10 @@
 		subscription.process()
 
 		self.assertEqual(len(subscription.invoices), 1)
+		frappe.db.set_value("Global Defaults", None, "default_company", None)
 
 	def test_prepaid_subscriptions_with_prorate_true(self):
+		frappe.db.set_value("Global Defaults", None, "default_company", "_Test Company")
 		settings = frappe.get_single('Subscription Settings')
 		to_prorate = settings.prorate
 		settings.prorate = 1
@@ -538,3 +580,4 @@
 		settings.save()
 
 		subscription.delete()
+		frappe.db.set_value("Global Defaults", None, "default_company", None)
\ No newline at end of file
diff --git a/erpnext/assets/doctype/asset/test_asset.py b/erpnext/assets/doctype/asset/test_asset.py
index a56440d..d2a7037 100644
--- a/erpnext/assets/doctype/asset/test_asset.py
+++ b/erpnext/assets/doctype/asset/test_asset.py
@@ -78,6 +78,7 @@
 			'qty': 1,
 			'asset': asset.name
 		})
+		doc.company = 'Wind Power LLC'
 
 		doc.set_missing_values()
 		self.assertEquals(doc.items[0].is_fixed_asset, 1)
@@ -595,7 +596,7 @@
 		"asset_name": args.asset_name or "Macbook Pro 1",
 		"asset_category": "Computers",
 		"item_code": args.item_code or "Macbook Pro",
-		"company": args.company or"_Test Company",
+		"company": args.company or "_Test Company",
 		"purchase_date": "2015-01-01",
 		"calculate_depreciation": 0,
 		"gross_purchase_amount": 100000,
diff --git a/erpnext/buying/report/procurement_tracker/test_procurement_tracker.py b/erpnext/buying/report/procurement_tracker/test_procurement_tracker.py
index bebf0cc..0c840ec 100644
--- a/erpnext/buying/report/procurement_tracker/test_procurement_tracker.py
+++ b/erpnext/buying/report/procurement_tracker/test_procurement_tracker.py
@@ -36,16 +36,18 @@
 		mr = make_material_request(company="_Test Procurement Company", warehouse=warehouse)
 		po = make_purchase_order(mr.name)
 		po.supplier = "_Test Supplier"
-		po.get("items")[0].cost_center = "_Test Cost Center - _TC"
+		po.company = "_Test Procurement Company"
+		po.get("items")[0].cost_center = "_Test Cost Center - _TPC"
 		po.submit()
 		pr = make_purchase_receipt(po.name)
+		pr.company = "_Test Procurement Company"
 		pr.submit()
 		frappe.db.commit()
 		date_obj = datetime.date(datetime.now())
 
 		expected_data = {
 			"material_request_date": date_obj,
-			"cost_center": "_Test Cost Center - _TC",
+			"cost_center": "_Test Cost Center - _TPC",
 			"project": None,
 			"requesting_site": "_Test Procurement Warehouse - _TPC",
 			"requestor": "Administrator",
diff --git a/erpnext/controllers/tests/test_mapper.py b/erpnext/controllers/tests/test_mapper.py
index d02308d..93d1b32 100644
--- a/erpnext/controllers/tests/test_mapper.py
+++ b/erpnext/controllers/tests/test_mapper.py
@@ -43,6 +43,7 @@
 		qtn = frappe.get_doc({
 			"doctype": "Quotation",
 			"quotation_to": "Customer",
+			"company": "_Test Company",
 			"party_name": customer,
 			"order_type": "Sales",
 			"transaction_date" : nowdate(),
@@ -59,6 +60,7 @@
 			"base_amount": 1000.0,
 			"base_rate": 100.0,
 			"description": "CPU",
+			"company": "_Test Company",
 			"doctype": "Sales Order Item",
 			"item_code": "_Test Item Home Desktop 100",
 			"item_name": "CPU",
diff --git a/erpnext/crm/doctype/opportunity/test_opportunity.py b/erpnext/crm/doctype/opportunity/test_opportunity.py
index 33d9007..fc852b1 100644
--- a/erpnext/crm/doctype/opportunity/test_opportunity.py
+++ b/erpnext/crm/doctype/opportunity/test_opportunity.py
@@ -30,6 +30,7 @@
 		new_lead_email_id = "new{}@example.com".format(random_string(5))
 		args = {
 			"doctype": "Opportunity",
+			"company": "_Test Company",
 			"contact_email": new_lead_email_id,
 			"opportunity_type": "Sales",
 			"with_items": 0,
diff --git a/erpnext/erpnext_integrations/doctype/plaid_settings/test_plaid_settings.py b/erpnext/erpnext_integrations/doctype/plaid_settings/test_plaid_settings.py
index 29e8fa4..75184d9 100644
--- a/erpnext/erpnext_integrations/doctype/plaid_settings/test_plaid_settings.py
+++ b/erpnext/erpnext_integrations/doctype/plaid_settings/test_plaid_settings.py
@@ -108,7 +108,7 @@
 		}
 
 		bank = json.dumps(frappe.get_doc("Bank", "Citi").as_dict(), default=json_handler)
-		company = frappe.db.get_single_value('Global Defaults', 'default_company')
+		company = frappe.db.get_single_value('Global Defaults', 'default_company') or '_Test Company'
 
 		if frappe.db.get_value("Company", company, "default_bank_account") is None:
 			frappe.db.set_value("Company", company, "default_bank_account", get_default_bank_cash_account(company, "Cash").get("account"))
diff --git a/erpnext/healthcare/doctype/inpatient_record/test_inpatient_record.py b/erpnext/healthcare/doctype/inpatient_record/test_inpatient_record.py
index e15324c..7a7936a 100644
--- a/erpnext/healthcare/doctype/inpatient_record/test_inpatient_record.py
+++ b/erpnext/healthcare/doctype/inpatient_record/test_inpatient_record.py
@@ -84,7 +84,8 @@
 		service_unit.service_unit_type = get_service_unit_type()
 		service_unit.inpatient_occupancy = 1
 		service_unit.occupancy_status = "Vacant"
-		service_unit.is_group = 0
+		service_unit.is_group = 0,
+		service_unit.company = "_Test Company"
 		service_unit_parent_name = frappe.db.exists({
 				"doctype": "Healthcare Service Unit",
 				"healthcare_service_unit_name": "All Healthcare Service Units",
diff --git a/erpnext/hr/doctype/compensatory_leave_request/test_compensatory_leave_request.py b/erpnext/hr/doctype/compensatory_leave_request/test_compensatory_leave_request.py
index 1615ab3..1181192 100644
--- a/erpnext/hr/doctype/compensatory_leave_request/test_compensatory_leave_request.py
+++ b/erpnext/hr/doctype/compensatory_leave_request/test_compensatory_leave_request.py
@@ -104,7 +104,8 @@
 				"doctype": "Attendance",
 				"employee": employee.name,
 				"attendance_date": date,
-				"status": status
+				"status": status,
+				"company": "_Test Company"
 		})
 		attendance.save()
 		attendance.submit()
diff --git a/erpnext/hr/doctype/department/test_department.py b/erpnext/hr/doctype/department/test_department.py
index 2eeca26..a6e8aae 100644
--- a/erpnext/hr/doctype/department/test_department.py
+++ b/erpnext/hr/doctype/department/test_department.py
@@ -16,7 +16,7 @@
         'is_group': 0,
         'parent_department': parent_department,
         'department_name': department_name,
-        'company': frappe.defaults.get_defaults().company
+        'company': frappe.defaults.get_defaults().company or 'Wind Power LLC'
     }).insert()
 
     return doc
diff --git a/erpnext/hr/doctype/employee/test_employee.py b/erpnext/hr/doctype/employee/test_employee.py
index d3410de..eff382d 100644
--- a/erpnext/hr/doctype/employee/test_employee.py
+++ b/erpnext/hr/doctype/employee/test_employee.py
@@ -60,7 +60,7 @@
 			"doctype": "Employee",
 			"naming_series": "EMP-",
 			"first_name": user,
-			"company": company or erpnext.get_default_company(),
+			"company": company or erpnext.get_default_company() or 'Wind Power LLC',
 			"user_id": user,
 			"date_of_birth": "1990-05-08",
 			"date_of_joining": "2013-01-01",
diff --git a/erpnext/hr/doctype/employee_tax_exemption_declaration/test_employee_tax_exemption_declaration.py b/erpnext/hr/doctype/employee_tax_exemption_declaration/test_employee_tax_exemption_declaration.py
index 9c87bbd..d53f6a7 100644
--- a/erpnext/hr/doctype/employee_tax_exemption_declaration/test_employee_tax_exemption_declaration.py
+++ b/erpnext/hr/doctype/employee_tax_exemption_declaration/test_employee_tax_exemption_declaration.py
@@ -88,7 +88,7 @@
 		payroll_period = frappe.get_doc(dict(
 			doctype = 'Payroll Period',
 			name = "_Test Payroll Period",
-			company =  erpnext.get_default_company(),
+			company =  erpnext.get_default_company() or 'Wind Power LLC',
 			start_date = date(date.today().year, 1, 1),
 			end_date = date(date.today().year, 12, 31)
 		)).insert()
diff --git a/erpnext/hr/doctype/expense_claim/test_expense_claim.py b/erpnext/hr/doctype/expense_claim/test_expense_claim.py
index 6e97f05..e7ee108 100644
--- a/erpnext/hr/doctype/expense_claim/test_expense_claim.py
+++ b/erpnext/hr/doctype/expense_claim/test_expense_claim.py
@@ -94,6 +94,7 @@
 		payable_account = get_payable_account(company_name)
 		expense_claim = frappe.get_doc({
 			 "doctype": "Expense Claim",
+			 "company": "_Test Company",
 			 "employee": "_T-Employee-00001",
 			 "payable_account": payable_account,
 			 "approval_status": "Rejected",
diff --git a/erpnext/hr/doctype/job_offer/test_job_offer.py b/erpnext/hr/doctype/job_offer/test_job_offer.py
index 8886596..1da107b 100644
--- a/erpnext/hr/doctype/job_offer/test_job_offer.py
+++ b/erpnext/hr/doctype/job_offer/test_job_offer.py
@@ -55,7 +55,8 @@
 		"job_applicant": args.job_applicant or job_applicant.name,
 		"offer_date": args.offer_date or nowdate(),
 		"designation": args.designation or "Researcher",
-		"status": args.status or "Accepted"
+		"status": args.status or "Accepted",
+		"company": "_Test Company"
 	})
 	return job_offer
 
@@ -68,6 +69,7 @@
 	staffing_plan = frappe.get_doc({
 		"doctype": "Staffing Plan",
 		"name": args.name or "Test",
+		"company": "_Test Company",
 		"from_date": args.from_date or nowdate(),
 		"to_date": args.to_date or add_days(nowdate(), 10),
 		"staffing_details": args.staffing_details or [{
diff --git a/erpnext/hr/doctype/salary_slip/test_salary_slip.py b/erpnext/hr/doctype/salary_slip/test_salary_slip.py
index ecccac7..cd73b94 100644
--- a/erpnext/hr/doctype/salary_slip/test_salary_slip.py
+++ b/erpnext/hr/doctype/salary_slip/test_salary_slip.py
@@ -359,7 +359,7 @@
 		get_salary_component_account(salary_component["salary_component"], company_list)
 
 def get_salary_component_account(sal_comp, company_list=None):
-	company = erpnext.get_default_company()
+	company = erpnext.get_default_company() or 'Wind Power LLC'
 
 	if company_list and company not in company_list:
 		company_list.append(company)
diff --git a/erpnext/hr/doctype/salary_structure/test_salary_structure.py b/erpnext/hr/doctype/salary_structure/test_salary_structure.py
index 6ca6dfd..e465d04 100644
--- a/erpnext/hr/doctype/salary_structure/test_salary_structure.py
+++ b/erpnext/hr/doctype/salary_structure/test_salary_structure.py
@@ -116,7 +116,7 @@
 		details = {
 			"doctype": "Salary Structure",
 			"name": salary_structure,
-			"company": company or erpnext.get_default_company(),
+			"company": company or erpnext.get_default_company() or "_Test Company",
 			"earnings": make_earning_salary_component(test_tax=test_tax, company_list=["_Test Company"]),
 			"deductions": make_deduction_salary_component(test_tax=test_tax, company_list=["_Test Company"]),
 			"payroll_frequency": payroll_frequency,
diff --git a/erpnext/hr/doctype/training_event/test_training_event.py b/erpnext/hr/doctype/training_event/test_training_event.py
index 57123e3..5ddb99b 100644
--- a/erpnext/hr/doctype/training_event/test_training_event.py
+++ b/erpnext/hr/doctype/training_event/test_training_event.py
@@ -32,7 +32,8 @@
 		frappe.get_doc({
 			"doctype": "Training Program",
 			"training_program": training_program,
-			"description": training_program
+			"description": training_program,
+			"company": "Wind Power LLC"
 		}).insert()
 
 def get_attendees(employee, employee2):
diff --git a/erpnext/stock/doctype/delivery_note/test_delivery_note.py b/erpnext/stock/doctype/delivery_note/test_delivery_note.py
index c15fada..a0c69c3 100644
--- a/erpnext/stock/doctype/delivery_note/test_delivery_note.py
+++ b/erpnext/stock/doctype/delivery_note/test_delivery_note.py
@@ -192,6 +192,7 @@
 		serial_no = frappe.get_doc({
 			"doctype": "Serial No",
 			"item_code": "_Test Serialized Item With Series",
+			"company": "Wind Power LLC",
 			"serial_no": make_autoname("SR", "Serial No")
 		})
 		serial_no.save()
@@ -585,32 +586,6 @@
 		for i, gle in enumerate(gl_entries):
 			self.assertEqual(expected_values[gle.account]["cost_center"], gle.cost_center)
 
-	def test_delivery_note_without_cost_center(self):
-		cost_center = "Main - TCP1"
-
-		company = frappe.db.get_value('Warehouse', 'Stores - TCP1', 'company')
-
-		set_valuation_method("_Test Item", "FIFO")
-
-		make_stock_entry(target="Stores - TCP1", qty=5, basic_rate=100)
-
-		stock_in_hand_account = get_inventory_account('_Test Company with perpetual inventory')
-		dn = create_delivery_note(company='_Test Company with perpetual inventory', warehouse='Stores - TCP1', cost_center = 'Main - TCP1', expense_account = "Cost of Goods Sold - TCP1")
-
-		gl_entries = get_gl_entries("Delivery Note", dn.name)
-
-		self.assertTrue(gl_entries)
-		expected_values = {
-			"Cost of Goods Sold - TCP1": {
-				"cost_center": cost_center
-			},
-			stock_in_hand_account: {
-				"cost_center": None
-			}
-		}
-		for i, gle in enumerate(gl_entries):
-			self.assertEqual(expected_values[gle.account]["cost_center"], gle.cost_center)
-
 	def test_make_sales_invoice_from_dn_for_returned_qty(self):
 		from erpnext.selling.doctype.sales_order.sales_order import make_delivery_note
 		from erpnext.stock.doctype.delivery_note.delivery_note import make_sales_invoice
diff --git a/erpnext/stock/doctype/delivery_trip/test_delivery_trip.py b/erpnext/stock/doctype/delivery_trip/test_delivery_trip.py
index eeea6da..da2c97c 100644
--- a/erpnext/stock/doctype/delivery_trip/test_delivery_trip.py
+++ b/erpnext/stock/doctype/delivery_trip/test_delivery_trip.py
@@ -172,7 +172,7 @@
 
 	delivery_trip = frappe.get_doc({
 		"doctype": "Delivery Trip",
-		"company": erpnext.get_default_company(),
+		"company": erpnext.get_default_company() or 'Wind Power LLC',
 		"departure_time": add_days(now_datetime(), 5),
 		"driver": driver.name,
 		"driver_address": address.name,
diff --git a/erpnext/stock/doctype/purchase_receipt/test_purchase_receipt.py b/erpnext/stock/doctype/purchase_receipt/test_purchase_receipt.py
index 9d41b45..a45fb30 100644
--- a/erpnext/stock/doctype/purchase_receipt/test_purchase_receipt.py
+++ b/erpnext/stock/doctype/purchase_receipt/test_purchase_receipt.py
@@ -432,30 +432,6 @@
 		for i, gle in enumerate(gl_entries):
 			self.assertEqual(expected_values[gle.account]["cost_center"], gle.cost_center)
 
-	def test_purchase_receipt_without_cost_center(self):
-		if not frappe.db.exists('Location', 'Test Location'):
-			frappe.get_doc({
-				'doctype': 'Location',
-				'location_name': 'Test Location'
-			}).insert()
-		pr = make_purchase_receipt(company="_Test Company with perpetual inventory", warehouse = "Stores - TCP1", supplier_warehouse = "Work in Progress - TCP1")
-
-		stock_in_hand_account = get_inventory_account(pr.company, pr.get("items")[0].warehouse)
-		gl_entries = get_gl_entries("Purchase Receipt", pr.name)
-
-		self.assertTrue(gl_entries)
-
-		expected_values = {
-			"Stock Received But Not Billed - TCP1": {
-				"cost_center": None
-			},
-			stock_in_hand_account: {
-				"cost_center": None
-			}
-		}
-		for i, gle in enumerate(gl_entries):
-			self.assertEqual(expected_values[gle.account]["cost_center"], gle.cost_center)
-
 	def test_make_purchase_invoice_from_pr_for_returned_qty(self):
 		from erpnext.buying.doctype.purchase_order.test_purchase_order import create_purchase_order, create_pr_against_po
 
diff --git a/erpnext/stock/doctype/serial_no/test_serial_no.py b/erpnext/stock/doctype/serial_no/test_serial_no.py
index ab06107..7b06ef9 100644
--- a/erpnext/stock/doctype/serial_no/test_serial_no.py
+++ b/erpnext/stock/doctype/serial_no/test_serial_no.py
@@ -24,6 +24,7 @@
 		frappe.delete_doc_if_exists("Serial No", "_TCSER0001")
 
 		sr = frappe.new_doc("Serial No")
+		sr.company = '_Test Company'
 		sr.item_code = "_Test Serialized Item"
 		sr.warehouse = "_Test Warehouse - _TC"
 		sr.serial_no = "_TCSER0001"