diff --git a/erpnext/accounts/doctype/journal_entry/test_journal_entry.py b/erpnext/accounts/doctype/journal_entry/test_journal_entry.py
index 0b30f9f..23ad1ee 100644
--- a/erpnext/accounts/doctype/journal_entry/test_journal_entry.py
+++ b/erpnext/accounts/doctype/journal_entry/test_journal_entry.py
@@ -234,6 +234,42 @@
 		for gle in gl_entries:
 			self.assertEqual(expected_values[gle.account]["cost_center"], gle.cost_center)
 
+	def test_jv_with_project(self):
+		from erpnext.projects.doctype.project.test_project import make_project
+		project = make_project({
+			'project_name': 'Journal Entry Project',
+			'project_template_name': 'Test Project Template',
+			'start_date': '2020-01-01'
+		})
+
+		jv = make_journal_entry("_Test Cash - _TC", "_Test Bank - _TC", 100, save=False)
+		for d in jv.accounts:
+			d.project = project.project_name
+		jv.voucher_type = "Bank Entry"
+		jv.multi_currency = 0
+		jv.cheque_no = "112233"
+		jv.cheque_date = nowdate()
+		jv.insert()
+		jv.submit()
+
+		expected_values = {
+			"_Test Cash - _TC": {
+				"project": project.project_name
+			},
+			"_Test Bank - _TC": {
+				"project": project.project_name
+			}
+		}
+
+		gl_entries = frappe.db.sql("""select account, project, debit, credit
+			from `tabGL Entry` where voucher_type='Journal Entry' and voucher_no=%s
+			order by account asc""", jv.name, as_dict=1)
+
+		self.assertTrue(gl_entries)
+
+		for gle in gl_entries:
+			self.assertEqual(expected_values[gle.account]["project"], gle.project)
+
 	def test_jv_account_and_party_balance_with_cost_centre(self):
 		from erpnext.accounts.doctype.cost_center.test_cost_center import create_cost_center
 		from erpnext.accounts.utils import get_balance_on
diff --git a/erpnext/accounts/doctype/purchase_invoice/test_purchase_invoice.py b/erpnext/accounts/doctype/purchase_invoice/test_purchase_invoice.py
index c234331..af0eddf 100644
--- a/erpnext/accounts/doctype/purchase_invoice/test_purchase_invoice.py
+++ b/erpnext/accounts/doctype/purchase_invoice/test_purchase_invoice.py
@@ -840,7 +840,45 @@
 
 		for gle in gl_entries:
 			self.assertEqual(expected_values[gle.account]["cost_center"], gle.cost_center)
+	
+	def test_purchase_invoice_with_project_link(self):
+		from erpnext.projects.doctype.project.test_project import make_project
 
+		project = make_project({
+			'project_name': 'Purchase Invoice Project',
+			'project_template_name': 'Test Project Template',
+			'start_date': '2020-01-01'
+		})
+		item_project = make_project({
+			'project_name': 'Purchase Invoice Item Project',
+			'project_template_name': 'Test Project Template',
+			'start_date': '2019-06-01'
+		})
+
+		pi = make_purchase_invoice(credit_to="Creditors - _TC" ,do_not_save=1)
+		pi.items[0].project = item_project.project_name
+		pi.project = project.project_name
+
+		pi.submit()
+
+		expected_values = {
+			"Creditors - _TC": {
+				"project": project.project_name
+			},
+			"_Test Account Cost for Goods Sold - _TC": {
+				"project": item_project.project_name
+			}
+		}
+
+		gl_entries = frappe.db.sql("""select account, cost_center, project, account_currency, debit, credit,
+			debit_in_account_currency, credit_in_account_currency
+			from `tabGL Entry` where voucher_type='Purchase Invoice' and voucher_no=%s
+			order by account asc""", pi.name, as_dict=1)
+		
+		self.assertTrue(gl_entries)
+		
+		for gle in gl_entries:
+			self.assertEqual(expected_values[gle.account]["project"], gle.project)
 
 def unlink_payment_on_cancel_of_invoice(enable=1):
 	accounts_settings = frappe.get_doc("Accounts Settings")
diff --git a/erpnext/accounts/doctype/sales_invoice/test_sales_invoice.py b/erpnext/accounts/doctype/sales_invoice/test_sales_invoice.py
index 6636025..cb2d8c3 100644
--- a/erpnext/accounts/doctype/sales_invoice/test_sales_invoice.py
+++ b/erpnext/accounts/doctype/sales_invoice/test_sales_invoice.py
@@ -1659,6 +1659,45 @@
 
 		for gle in gl_entries:
 			self.assertEqual(expected_values[gle.account]["cost_center"], gle.cost_center)
+	
+	def test_sales_invoice_with_project_link(self):
+		from erpnext.projects.doctype.project.test_project import make_project
+
+		project = make_project({
+			'project_name': 'Sales Invoice Project',
+			'project_template_name': 'Test Project Template',
+			'start_date': '2020-01-01'
+		})
+		item_project = make_project({
+			'project_name': 'Sales Invoice Item Project',
+			'project_template_name': 'Test Project Template',
+			'start_date': '2019-06-01'
+		})
+
+		sales_invoice = create_sales_invoice(do_not_save=1)
+		sales_invoice.items[0].project = item_project.project_name
+		sales_invoice.project = project.project_name
+
+		sales_invoice.submit()
+
+		expected_values = {
+			"Debtors - _TC": {
+				"project": project.project_name
+			},
+			"Sales - _TC": {
+				"project": item_project.project_name
+			}
+		}
+
+		gl_entries = frappe.db.sql("""select account, cost_center, project, account_currency, debit, credit,
+			debit_in_account_currency, credit_in_account_currency
+			from `tabGL Entry` where voucher_type='Sales Invoice' and voucher_no=%s
+			order by account asc""", sales_invoice.name, as_dict=1)
+		
+		self.assertTrue(gl_entries)
+		
+		for gle in gl_entries:
+			self.assertEqual(expected_values[gle.account]["project"], gle.project)
 
 	def test_sales_invoice_without_cost_center(self):
 		cost_center = "_Test Cost Center - _TC"
diff --git a/erpnext/projects/doctype/project/test_project.py b/erpnext/projects/doctype/project/test_project.py
index 06c62b6..0c4f6f1 100644
--- a/erpnext/projects/doctype/project/test_project.py
+++ b/erpnext/projects/doctype/project/test_project.py
@@ -7,7 +7,7 @@
 test_records = frappe.get_test_records('Project')
 test_ignore = ["Sales Order"]
 
-from erpnext.projects.doctype.project_template.test_project_template import get_project_template
+from erpnext.projects.doctype.project_template.test_project_template import get_project_template, make_project_template
 from erpnext.projects.doctype.project.project import set_project_status
 
 from frappe.utils import getdate
@@ -43,4 +43,24 @@
 		expected_start_date = '2019-01-01'
 	)).insert()
 
+	return project
+
+def make_project(args):
+	args = frappe._dict(args)
+	if args.project_template_name:
+		template = make_project_template(args.project_template_name)
+	else:
+		template = get_project_template()
+
+	project = frappe.get_doc(dict(
+		doctype = 'Project',
+		project_name = args.project_name,
+		status = 'Open',
+		project_template = template.name,
+		expected_start_date = args.start_date
+	))
+
+	if not frappe.db.exists("Project", args.project_name):
+		project.insert()
+
 	return project
\ No newline at end of file
diff --git a/erpnext/projects/doctype/project_template/test_project_template.py b/erpnext/projects/doctype/project_template/test_project_template.py
index efcb2ea..2c5831a 100644
--- a/erpnext/projects/doctype/project_template/test_project_template.py
+++ b/erpnext/projects/doctype/project_template/test_project_template.py
@@ -26,4 +26,23 @@
 			]
 		)).insert()
 
-	return frappe.get_doc('Project Template', 'Test Project Template')
\ No newline at end of file
+	return frappe.get_doc('Project Template', 'Test Project Template')
+
+def make_project_template(project_template_name, project_tasks=[]):
+	if not frappe.db.exists('Project Template', project_template_name):
+		frappe.get_doc(dict(
+			doctype = 'Project Template',
+			name = project_template_name,
+			tasks = project_tasks or [
+				dict(subject='Task 1', description='Task 1 description',
+					start=0, duration=3),
+				dict(subject='Task 2', description='Task 2 description',
+					start=0, duration=2),
+				dict(subject='Task 3', description='Task 3 description',
+					start=2, duration=4),
+				dict(subject='Task 4', description='Task 4 description',
+					start=3, duration=2),
+			]
+		)).insert()
+
+	return frappe.get_doc('Project Template', project_template_name)
\ No newline at end of file