diff --git a/erpnext/healthcare/doctype/patient_appointment/patient_appointment.py b/erpnext/healthcare/doctype/patient_appointment/patient_appointment.py
index 34aa8650e19..0d98fff04ff 100755
--- a/erpnext/healthcare/doctype/patient_appointment/patient_appointment.py
+++ b/erpnext/healthcare/doctype/patient_appointment/patient_appointment.py
@@ -255,7 +255,8 @@ def create_sales_invoice(appointment_doc):
 	sales_invoice.customer = frappe.get_value("Patient", appointment_doc.patient, "customer")
 	sales_invoice.currency = frappe.get_value(
 		"Customer", sales_invoice.customer, "default_currency"
-	) or get_company_currency(appointment_doc.currency)
+	) or get_company_currency(appointment_doc.company)
+
 	sales_invoice.appointment = appointment_doc.name
 	sales_invoice.due_date = getdate()
 	sales_invoice.company = appointment_doc.company
diff --git a/erpnext/healthcare/doctype/patient_appointment/test_patient_appointment.py b/erpnext/healthcare/doctype/patient_appointment/test_patient_appointment.py
index 048547a9322..05e6b9cfe0d 100644
--- a/erpnext/healthcare/doctype/patient_appointment/test_patient_appointment.py
+++ b/erpnext/healthcare/doctype/patient_appointment/test_patient_appointment.py
@@ -379,6 +379,7 @@ def create_patient(
 	patient.mobile = mobile
 	patient.email = email
 	patient.customer = customer
+	patient.default_currency = "INR"
 	patient.invite_user = create_user
 	patient.save(ignore_permissions=True)
 
diff --git a/erpnext/projects/doctype/timesheet/test_timesheet.py b/erpnext/projects/doctype/timesheet/test_timesheet.py
index 57bfd5b6074..7298c037a70 100644
--- a/erpnext/projects/doctype/timesheet/test_timesheet.py
+++ b/erpnext/projects/doctype/timesheet/test_timesheet.py
@@ -84,7 +84,9 @@ class TestTimesheet(unittest.TestCase):
 		emp = make_employee("test_employee_6@salary.com")
 
 		timesheet = make_timesheet(emp, simulate=True, is_billable=1)
-		sales_invoice = make_sales_invoice(timesheet.name, "_Test Item", "_Test Customer")
+		sales_invoice = make_sales_invoice(
+			timesheet.name, "_Test Item", "_Test Customer", currency="INR"
+		)
 		sales_invoice.due_date = nowdate()
 		sales_invoice.submit()
 		timesheet = frappe.get_doc("Timesheet", timesheet.name)