diff --git a/erpnext/accounts/doctype/subscription/subscription.py b/erpnext/accounts/doctype/subscription/subscription.py
index 0933c7e..fbdaf1b 100644
--- a/erpnext/accounts/doctype/subscription/subscription.py
+++ b/erpnext/accounts/doctype/subscription/subscription.py
@@ -238,6 +238,10 @@
 		Creates a `Sales Invoice`, submits it and returns it
 		"""
 		invoice = frappe.new_doc('Sales Invoice')
+		
+		if not invoice.company:
+			invoice.company = frappe.db.get_value('Global Defaults', None, 'default_company')
+
 		invoice.set_posting_time = 1
 		invoice.posting_date = self.current_invoice_start
 		invoice.customer = self.customer
diff --git a/erpnext/healthcare/doctype/clinical_procedure/test_clinical_procedure.py b/erpnext/healthcare/doctype/clinical_procedure/test_clinical_procedure.py
index 207351f..100addc 100644
--- a/erpnext/healthcare/doctype/clinical_procedure/test_clinical_procedure.py
+++ b/erpnext/healthcare/doctype/clinical_procedure/test_clinical_procedure.py
@@ -18,6 +18,7 @@
 		self.assertEquals(frappe.db.get_value('Item', procedure_template.item, 'disabled'), 1)
 
 	def test_consumables(self):
+		frappe.db.set_value('Global Defaults', None, 'default_company', '_Test Company')
 		patient, medical_department, practitioner = create_healthcare_docs()
 		procedure_template = create_clinical_procedure_template()
 		procedure_template.allow_stock_consumption = 1
@@ -38,6 +39,7 @@
 		result = procedure.complete_procedure()
 		# check consumption
 		self.assertTrue(frappe.db.exists('Stock Entry', result))
+		frappe.db.set_value('Global Defaults', None, 'default_company', None)
 
 
 def create_consumable():
diff --git a/erpnext/healthcare/doctype/patient/test_patient.py b/erpnext/healthcare/doctype/patient/test_patient.py
index 9274b6f..dfe61bd 100644
--- a/erpnext/healthcare/doctype/patient/test_patient.py
+++ b/erpnext/healthcare/doctype/patient/test_patient.py
@@ -15,6 +15,7 @@
 		self.assertTrue(frappe.db.get_value('Patient', patient, 'customer'))
 
 	def test_patient_registration(self):
+		frappe.db.set_value('Global Defaults', None, 'default_company', '_Test Company')
 		frappe.db.sql("""delete from `tabPatient`""")
 		settings = frappe.get_single('Healthcare Settings')
 		settings.collect_registration_fee = 1
@@ -32,3 +33,4 @@
 
 		settings.collect_registration_fee = 0
 		settings.save()
+		frappe.db.set_value('Global Defaults', None, 'default_company', None)
diff --git a/erpnext/healthcare/doctype/patient_medical_record/test_patient_medical_record.py b/erpnext/healthcare/doctype/patient_medical_record/test_patient_medical_record.py
index e5a5e4c..4de90bc 100644
--- a/erpnext/healthcare/doctype/patient_medical_record/test_patient_medical_record.py
+++ b/erpnext/healthcare/doctype/patient_medical_record/test_patient_medical_record.py
@@ -13,6 +13,7 @@
 		frappe.db.set_value('Healthcare Settings', None, 'automate_appointment_invoicing', 1)
 
 	def test_medical_record(self):
+		frappe.db.set_value('Global Defaults', None, 'default_company', '_Test Company')
 		patient, medical_department, practitioner = create_healthcare_docs()
 		appointment = create_appointment(patient, practitioner, nowdate(), invoice=1)
 		encounter = create_encounter(appointment)
@@ -38,6 +39,7 @@
 		# check for lab test
 		medical_rec = frappe.db.exists('Patient Medical Record', {'status': 'Open', 'reference_name': lab_test.name})
 		self.assertTrue(medical_rec)
+		frappe.db.set_value('Global Defaults', None, 'default_company', None)
 
 
 def create_procedure(appointment):
diff --git a/erpnext/hr/doctype/employee/test_employee.py b/erpnext/hr/doctype/employee/test_employee.py
index eff382d..755393e 100644
--- a/erpnext/hr/doctype/employee/test_employee.py
+++ b/erpnext/hr/doctype/employee/test_employee.py
@@ -55,7 +55,7 @@
 			"roles": [{"doctype": "Has Role", "role": "Employee"}]
 		}).insert()
 
-	if not frappe.db.get_value("Employee", { "user_id": user, "company": company or erpnext.get_default_company() }):
+	if not frappe.db.get_value("Employee", { "user_id": user, "company": company or erpnext.get_default_company() or 'Wind Power LLC' }):
 		employee = frappe.get_doc({
 			"doctype": "Employee",
 			"naming_series": "EMP-",
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 d53f6a7..4dc77cc 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
@@ -20,7 +20,7 @@
 		declaration = frappe.get_doc({
 			"doctype": "Employee Tax Exemption Declaration",
 			"employee": frappe.get_value("Employee", {"user_id":"employee@taxexepmtion.com"}, "name"),
-			"company": erpnext.get_default_company(),
+			"company": erpnext.get_default_company() or 'Wind Power LLC',
 			"payroll_period": "_Test Payroll Period",
 			"declarations": [
 				dict(exemption_sub_category = "_Test Sub Category",
@@ -37,7 +37,7 @@
 		declaration = frappe.get_doc({
 			"doctype": "Employee Tax Exemption Declaration",
 			"employee": frappe.get_value("Employee", {"user_id":"employee@taxexepmtion.com"}, "name"),
-			"company":  erpnext.get_default_company(),
+			"company":  erpnext.get_default_company()  or 'Wind Power LLC',
 			"payroll_period": "_Test Payroll Period",
 			"declarations": [
 				dict(exemption_sub_category = "_Test Sub Category",
@@ -52,7 +52,7 @@
 		duplicate_declaration = frappe.get_doc({
 			"doctype": "Employee Tax Exemption Declaration",
 			"employee": frappe.get_value("Employee", {"user_id":"employee@taxexepmtion.com"}, "name"),
-			"company":  erpnext.get_default_company(),
+			"company":  erpnext.get_default_company()  or 'Wind Power LLC',
 			"payroll_period": "_Test Payroll Period",
 			"declarations": [
 				dict(exemption_sub_category = "_Test Sub Category",
@@ -68,7 +68,7 @@
 		declaration = frappe.get_doc({
 			"doctype": "Employee Tax Exemption Declaration",
 			"employee": frappe.get_value("Employee", {"user_id":"employee@taxexepmtion.com"}, "name"),
-			"company":  erpnext.get_default_company(),
+			"company":  erpnext.get_default_company()  or 'Wind Power LLC',
 			"payroll_period": "_Test Payroll Period",
 			"declarations": [
 				dict(exemption_sub_category = "_Test Sub Category",
diff --git a/erpnext/hr/doctype/leave_period/test_leave_period.py b/erpnext/hr/doctype/leave_period/test_leave_period.py
index 1762cf9..06e5836 100644
--- a/erpnext/hr/doctype/leave_period/test_leave_period.py
+++ b/erpnext/hr/doctype/leave_period/test_leave_period.py
@@ -45,7 +45,7 @@
 
 def create_leave_period(from_date, to_date, company=None):
 	leave_period = frappe.db.get_value('Leave Period',
-		dict(company=company or erpnext.get_default_company(),
+		dict(company=company or erpnext.get_default_company()  or 'Wind Power LLC',
 			from_date=from_date,
 			to_date=to_date,
 			is_active=1), 'name')
@@ -54,7 +54,7 @@
 
 	leave_period = frappe.get_doc({
 		"doctype": "Leave Period",
-		"company": company or erpnext.get_default_company(),
+		"company": company or erpnext.get_default_company() or 'Wind Power LLC',
 		"from_date": from_date,
 		"to_date": to_date,
 		"is_active": 1
diff --git a/erpnext/hr/doctype/payroll_entry/test_payroll_entry.py b/erpnext/hr/doctype/payroll_entry/test_payroll_entry.py
index 49671d5..52fb69f 100644
--- a/erpnext/hr/doctype/payroll_entry/test_payroll_entry.py
+++ b/erpnext/hr/doctype/payroll_entry/test_payroll_entry.py
@@ -26,7 +26,7 @@
 		frappe.db.set_value("HR Settings", None, "email_salary_slip_to_employee", 0)
 
 	def test_payroll_entry(self): # pylint: disable=no-self-use
-		company = erpnext.get_default_company()
+		company = erpnext.get_default_company()  or 'Wind Power LLC'
 		for data in frappe.get_all('Salary Component', fields = ["name"]):
 			if not frappe.db.get_value('Salary Component Account',
 				{'parent': data.name, 'company': company}, 'name'):
@@ -109,7 +109,7 @@
 	args = frappe._dict(args)
 
 	payroll_entry = frappe.new_doc("Payroll Entry")
-	payroll_entry.company = args.company or erpnext.get_default_company()
+	payroll_entry.company = args.company or erpnext.get_default_company() or 'Wind Power LLC'
 	payroll_entry.start_date = args.start_date or "2016-11-01"
 	payroll_entry.end_date = args.end_date or "2016-11-30"
 	payroll_entry.payment_account = get_payment_account()
@@ -133,7 +133,7 @@
 
 def get_payment_account():
 	return frappe.get_value('Account',
-		{'account_type': 'Cash', 'company': erpnext.get_default_company(),'is_group':0}, "name")
+		{'account_type': 'Cash', 'company': erpnext.get_default_company() or 'Wind Power LLC', 'is_group':0}, "name")
 
 def make_holiday(holiday_list_name):
 	if not frappe.db.exists('Holiday List', holiday_list_name):
diff --git a/erpnext/hr/doctype/salary_slip/test_salary_slip.py b/erpnext/hr/doctype/salary_slip/test_salary_slip.py
index cd73b94..ac91aec 100644
--- a/erpnext/hr/doctype/salary_slip/test_salary_slip.py
+++ b/erpnext/hr/doctype/salary_slip/test_salary_slip.py
@@ -26,7 +26,7 @@
 
 		self.make_holiday_list()
 
-		frappe.db.set_value("Company", erpnext.get_default_company(), "default_holiday_list", "Salary Slip Test Holiday List")
+		frappe.db.set_value("Company", erpnext.get_default_company() or 'Wind Power LLC', "default_holiday_list", "Salary Slip Test Holiday List")
 		frappe.db.set_value("HR Settings", None, "email_salary_slip_to_employee", 0)
 
 	def tearDown(self):
@@ -175,7 +175,7 @@
 		self.assertEqual(ss.net_pay, (flt(ss.gross_pay) - (flt(ss.total_deduction) + flt(ss.total_loan_repayment))))
 
 	def test_payroll_frequency(self):
-		fiscal_year = get_fiscal_year(nowdate(), company=erpnext.get_default_company())[0]
+		fiscal_year = get_fiscal_year(nowdate(), company=erpnext.get_default_company() or 'Wind Power LLC')[0]
 		month = "%02d" % getdate(nowdate()).month
 		m = get_month_details(fiscal_year, month)
 
@@ -295,7 +295,7 @@
 		frappe.db.rollback()
 
 	def make_holiday_list(self):
-		fiscal_year = get_fiscal_year(nowdate(), company=erpnext.get_default_company())
+		fiscal_year = get_fiscal_year(nowdate(), company=erpnext.get_default_company() or 'Wind Power LLC')
 		if not frappe.db.get_value("Holiday List", "Salary Slip Test Holiday List"):
 			holiday_list = frappe.get_doc({
 				"doctype": "Holiday List",
@@ -499,7 +499,7 @@
 		"doctype": "Employee Tax Exemption Declaration",
 		"employee": employee,
 		"payroll_period": payroll_period,
-		"company": erpnext.get_default_company()
+		"company": erpnext.get_default_company() or 'Wind Power LLC'
 	})
 	declaration.append("declarations", {
 		"exemption_sub_category": "_Test Sub Category",
@@ -588,7 +588,7 @@
 	frappe.get_doc({
 		"doctype": "Additional Salary",
 		"employee": employee,
-		"company": erpnext.get_default_company(),
+		"company": erpnext.get_default_company() or 'Wind Power LLC',
 		"salary_component": "Performance Bonus",
 		"payroll_date": salary_date,
 		"amount": amount,
diff --git a/erpnext/hr/doctype/salary_structure/test_salary_structure.py b/erpnext/hr/doctype/salary_structure/test_salary_structure.py
index e465d04..17087d1 100644
--- a/erpnext/hr/doctype/salary_structure/test_salary_structure.py
+++ b/erpnext/hr/doctype/salary_structure/test_salary_structure.py
@@ -21,7 +21,7 @@
 			frappe.db.sql("delete from `tab%s`" % dt)
 
 		self.make_holiday_list()
-		frappe.db.set_value("Company", erpnext.get_default_company(), "default_holiday_list", "Salary Structure Test Holiday List")
+		frappe.db.set_value("Company", erpnext.get_default_company() or 'Wind Power LLC', "default_holiday_list", "Salary Structure Test Holiday List")
 		make_employee("test_employee@salary.com")
 		make_employee("test_employee_2@salary.com")
 
@@ -145,7 +145,7 @@
 	salary_structure_assignment.variable = 5000
 	salary_structure_assignment.from_date = from_date or add_months(nowdate(), -1)
 	salary_structure_assignment.salary_structure = salary_structure
-	salary_structure_assignment.company = company or erpnext.get_default_company()
+	salary_structure_assignment.company = company or erpnext.get_default_company() or 'Wind Power LLC'
 	salary_structure_assignment.save(ignore_permissions=True)
 	salary_structure_assignment.submit()
 	return salary_structure_assignment