style: format code with black
diff --git a/erpnext/controllers/tests/test_item_variant.py b/erpnext/controllers/tests/test_item_variant.py
index 5c6e06a..68c8d2c 100644
--- a/erpnext/controllers/tests/test_item_variant.py
+++ b/erpnext/controllers/tests/test_item_variant.py
@@ -12,11 +12,12 @@
 
 class TestItemVariant(unittest.TestCase):
 	def test_tables_in_template_copied_to_variant(self):
-		fields = [{'field_name': 'quality_inspection_template'}]
+		fields = [{"field_name": "quality_inspection_template"}]
 		set_item_variant_settings(fields)
 		variant = make_item_variant()
 		self.assertEqual(variant.get("quality_inspection_template"), "_Test QC Template")
 
+
 def create_variant_with_tables(item, args):
 	if isinstance(args, str):
 		args = json.loads(args)
@@ -27,14 +28,11 @@
 	template.save()
 
 	variant = frappe.new_doc("Item")
-	variant.variant_based_on = 'Item Attribute'
+	variant.variant_based_on = "Item Attribute"
 	variant_attributes = []
 
 	for d in template.attributes:
-		variant_attributes.append({
-			"attribute": d.attribute,
-			"attribute_value": args.get(d.attribute)
-		})
+		variant_attributes.append({"attribute": d.attribute, "attribute_value": args.get(d.attribute)})
 
 	variant.set("attributes", variant_attributes)
 	copy_attributes_to_variant(template, variant)
@@ -42,6 +40,7 @@
 
 	return variant
 
+
 def make_item_variant():
 	frappe.delete_doc_if_exists("Item", "_Test Variant Item-XSL", force=1)
 	variant = create_variant_with_tables("_Test Variant Item", '{"Test Size": "Extra Small"}')
@@ -50,6 +49,7 @@
 	variant.save()
 	return variant
 
+
 def make_quality_inspection_template():
 	qc_template = "_Test QC Template"
 	if frappe.db.exists("Quality Inspection Template", qc_template):
@@ -59,10 +59,13 @@
 	qc.quality_inspection_template_name = qc_template
 
 	create_quality_inspection_parameter("Moisture")
-	qc.append('item_quality_inspection_parameter', {
-		"specification": "Moisture",
-		"value": "< 5%",
-	})
+	qc.append(
+		"item_quality_inspection_parameter",
+		{
+			"specification": "Moisture",
+			"value": "< 5%",
+		},
+	)
 
 	qc.insert()
 	return qc.name
diff --git a/erpnext/controllers/tests/test_mapper.py b/erpnext/controllers/tests/test_mapper.py
index e755876..919bcda 100644
--- a/erpnext/controllers/tests/test_mapper.py
+++ b/erpnext/controllers/tests/test_mapper.py
@@ -10,14 +10,14 @@
 
 class TestMapper(unittest.TestCase):
 	def test_map_docs(self):
-		'''Test mapping of multiple source docs on a single target doc'''
+		"""Test mapping of multiple source docs on a single target doc"""
 
 		make_test_records("Item")
-		items = ['_Test Item', '_Test Item 2', '_Test FG Item']
+		items = ["_Test Item", "_Test Item 2", "_Test FG Item"]
 
 		# Make source docs (quotations) and a target doc (sales order)
-		qtn1, item_list_1 = self.make_quotation(items, '_Test Customer')
-		qtn2, item_list_2 = self.make_quotation(items, '_Test Customer')
+		qtn1, item_list_1 = self.make_quotation(items, "_Test Customer")
+		qtn2, item_list_2 = self.make_quotation(items, "_Test Customer")
 		so, item_list_3 = self.make_sales_order()
 
 		# Map source docs to target with corresponding mapper method
@@ -26,20 +26,20 @@
 
 		# Assert that all inserted items are present in updated sales order
 		src_items = item_list_1 + item_list_2 + item_list_3
-		self.assertEqual(set(d for d in src_items),
-			set(d.item_code for d in updated_so.items))
-
+		self.assertEqual(set(d for d in src_items), set(d.item_code for d in updated_so.items))
 
 	def make_quotation(self, item_list, customer):
 
-		qtn = frappe.get_doc({
-			"doctype": "Quotation",
-			"quotation_to": "Customer",
-			"party_name": customer,
-			"order_type": "Sales",
-			"transaction_date" : nowdate(),
-			"valid_till" : add_months(nowdate(), 1)
-		})
+		qtn = frappe.get_doc(
+			{
+				"doctype": "Quotation",
+				"quotation_to": "Customer",
+				"party_name": customer,
+				"order_type": "Sales",
+				"transaction_date": nowdate(),
+				"valid_till": add_months(nowdate(), 1),
+			}
+		)
 		for item in item_list:
 			qtn.append("items", {"qty": "2", "item_code": item})
 
@@ -47,21 +47,23 @@
 		return qtn, item_list
 
 	def make_sales_order(self):
-		item = frappe.get_doc({
-			"base_amount": 1000.0,
-			"base_rate": 100.0,
-			"description": "CPU",
-			"doctype": "Sales Order Item",
-			"item_code": "_Test Item",
-			"item_name": "CPU",
-			"parentfield": "items",
-			"qty": 10.0,
-			"rate": 100.0,
-			"warehouse": "_Test Warehouse - _TC",
-			"stock_uom": "_Test UOM",
-			"conversion_factor": 1.0,
-			"uom": "_Test UOM"
-		})
-		so = frappe.get_doc(frappe.get_test_records('Sales Order')[0])
+		item = frappe.get_doc(
+			{
+				"base_amount": 1000.0,
+				"base_rate": 100.0,
+				"description": "CPU",
+				"doctype": "Sales Order Item",
+				"item_code": "_Test Item",
+				"item_name": "CPU",
+				"parentfield": "items",
+				"qty": 10.0,
+				"rate": 100.0,
+				"warehouse": "_Test Warehouse - _TC",
+				"stock_uom": "_Test UOM",
+				"conversion_factor": 1.0,
+				"uom": "_Test UOM",
+			}
+		)
+		so = frappe.get_doc(frappe.get_test_records("Sales Order")[0])
 		so.insert(ignore_permissions=True)
 		return so, [item.item_code]
diff --git a/erpnext/controllers/tests/test_qty_based_taxes.py b/erpnext/controllers/tests/test_qty_based_taxes.py
index 49b844b..2e9dfd2 100644
--- a/erpnext/controllers/tests/test_qty_based_taxes.py
+++ b/erpnext/controllers/tests/test_qty_based_taxes.py
@@ -5,104 +5,131 @@
 
 
 def uuid4():
-    return str(_uuid4())
+	return str(_uuid4())
+
 
 class TestTaxes(unittest.TestCase):
-    def setUp(self):
-        self.company = frappe.get_doc({
-            'doctype': 'Company',
-            'company_name': uuid4(),
-            'abbr': ''.join(s[0] for s in uuid4().split('-')),
-            'default_currency': 'USD',
-            'country': 'United States',
-        }).insert()
-        self.account = frappe.get_doc({
-            'doctype': 'Account',
-            'account_name': uuid4(),
-            'account_type': 'Tax',
-            'company': self.company.name,
-            'parent_account': 'Duties and Taxes - {self.company.abbr}'.format(self=self)
-        }).insert()
-        self.item_group = frappe.get_doc({
-            'doctype': 'Item Group',
-            'item_group_name': uuid4(),
-            'parent_item_group': 'All Item Groups',
-        }).insert()
-        self.item_tax_template = frappe.get_doc({
-            'doctype': 'Item Tax Template',
-            'title': uuid4(),
-            'company': self.company.name,
-            'taxes': [
-                {
-                    'tax_type': self.account.name,
-                    'tax_rate': 2,
-                }
-            ]
-        }).insert()
-        self.item = frappe.get_doc({
-            'doctype': 'Item',
-            'item_code': uuid4(),
-            'item_group': self.item_group.name,
-            'is_stock_item': 0,
-            'taxes': [
-                {
-                    'item_tax_template': self.item_tax_template.name,
-                    'tax_category': '',
-                }
-            ],
-        }).insert()
-        self.customer = frappe.get_doc({
-            'doctype': 'Customer',
-            'customer_name': uuid4(),
-            'customer_group': 'All Customer Groups',
-        }).insert()
-        self.supplier = frappe.get_doc({
-            'doctype': 'Supplier',
-            'supplier_name': uuid4(),
-            'supplier_group': 'All Supplier Groups',
-        }).insert()
+	def setUp(self):
+		self.company = frappe.get_doc(
+			{
+				"doctype": "Company",
+				"company_name": uuid4(),
+				"abbr": "".join(s[0] for s in uuid4().split("-")),
+				"default_currency": "USD",
+				"country": "United States",
+			}
+		).insert()
+		self.account = frappe.get_doc(
+			{
+				"doctype": "Account",
+				"account_name": uuid4(),
+				"account_type": "Tax",
+				"company": self.company.name,
+				"parent_account": "Duties and Taxes - {self.company.abbr}".format(self=self),
+			}
+		).insert()
+		self.item_group = frappe.get_doc(
+			{
+				"doctype": "Item Group",
+				"item_group_name": uuid4(),
+				"parent_item_group": "All Item Groups",
+			}
+		).insert()
+		self.item_tax_template = frappe.get_doc(
+			{
+				"doctype": "Item Tax Template",
+				"title": uuid4(),
+				"company": self.company.name,
+				"taxes": [
+					{
+						"tax_type": self.account.name,
+						"tax_rate": 2,
+					}
+				],
+			}
+		).insert()
+		self.item = frappe.get_doc(
+			{
+				"doctype": "Item",
+				"item_code": uuid4(),
+				"item_group": self.item_group.name,
+				"is_stock_item": 0,
+				"taxes": [
+					{
+						"item_tax_template": self.item_tax_template.name,
+						"tax_category": "",
+					}
+				],
+			}
+		).insert()
+		self.customer = frappe.get_doc(
+			{
+				"doctype": "Customer",
+				"customer_name": uuid4(),
+				"customer_group": "All Customer Groups",
+			}
+		).insert()
+		self.supplier = frappe.get_doc(
+			{
+				"doctype": "Supplier",
+				"supplier_name": uuid4(),
+				"supplier_group": "All Supplier Groups",
+			}
+		).insert()
 
-    def test_taxes(self):
-        self.created_docs = []
-        for dt in ['Purchase Order', 'Purchase Receipt', 'Purchase Invoice',
-                'Quotation', 'Sales Order', 'Delivery Note', 'Sales Invoice']:
-            doc = frappe.get_doc({
-                'doctype': dt,
-                'company': self.company.name,
-                'supplier': self.supplier.name,
-                'currency': "USD",
-                'schedule_date': frappe.utils.nowdate(),
-                'delivery_date': frappe.utils.nowdate(),
-                'customer': self.customer.name,
-                'buying_price_list' if dt.startswith('Purchase') else 'selling_price_list'
-                : 'Standard Buying' if dt.startswith('Purchase') else 'Standard Selling',
-                'items': [
-                    {
-                        'item_code': self.item.name,
-                        'qty': 300,
-                        'rate': 100,
-                    }
-                ],
-                'taxes': [
-                    {
-                        'charge_type': 'On Item Quantity',
-                        'account_head': self.account.name,
-                        'description': 'N/A',
-                        'rate': 0,
-                    },
-                ],
-            })
-            doc.run_method('set_missing_values')
-            doc.run_method('calculate_taxes_and_totals')
-            doc.insert()
-            self.assertEqual(doc.taxes[0].tax_amount, 600)
-            self.created_docs.append(doc)
+	def test_taxes(self):
+		self.created_docs = []
+		for dt in [
+			"Purchase Order",
+			"Purchase Receipt",
+			"Purchase Invoice",
+			"Quotation",
+			"Sales Order",
+			"Delivery Note",
+			"Sales Invoice",
+		]:
+			doc = frappe.get_doc(
+				{
+					"doctype": dt,
+					"company": self.company.name,
+					"supplier": self.supplier.name,
+					"currency": "USD",
+					"schedule_date": frappe.utils.nowdate(),
+					"delivery_date": frappe.utils.nowdate(),
+					"customer": self.customer.name,
+					"buying_price_list"
+					if dt.startswith("Purchase")
+					else "selling_price_list": "Standard Buying"
+					if dt.startswith("Purchase")
+					else "Standard Selling",
+					"items": [
+						{
+							"item_code": self.item.name,
+							"qty": 300,
+							"rate": 100,
+						}
+					],
+					"taxes": [
+						{
+							"charge_type": "On Item Quantity",
+							"account_head": self.account.name,
+							"description": "N/A",
+							"rate": 0,
+						},
+					],
+				}
+			)
+			doc.run_method("set_missing_values")
+			doc.run_method("calculate_taxes_and_totals")
+			doc.insert()
+			self.assertEqual(doc.taxes[0].tax_amount, 600)
+			self.created_docs.append(doc)
 
-    def tearDown(self):
-        for doc in self.created_docs:
-            doc.delete()
-        self.item.delete()
-        self.item_group.delete()
-        self.item_tax_template.delete()
-        self.account.delete()
-        self.company.delete()
+	def tearDown(self):
+		for doc in self.created_docs:
+			doc.delete()
+		self.item.delete()
+		self.item_group.delete()
+		self.item_tax_template.delete()
+		self.account.delete()
+		self.company.delete()
diff --git a/erpnext/controllers/tests/test_transaction_base.py b/erpnext/controllers/tests/test_transaction_base.py
index f4d3f97..1471543 100644
--- a/erpnext/controllers/tests/test_transaction_base.py
+++ b/erpnext/controllers/tests/test_transaction_base.py
@@ -5,18 +5,28 @@
 
 class TestUtils(unittest.TestCase):
 	def test_reset_default_field_value(self):
-		doc = frappe.get_doc({
-			"doctype": "Purchase Receipt",
-			"set_warehouse": "Warehouse 1",
-		})
+		doc = frappe.get_doc(
+			{
+				"doctype": "Purchase Receipt",
+				"set_warehouse": "Warehouse 1",
+			}
+		)
 
 		# Same values
-		doc.items = [{"warehouse": "Warehouse 1"}, {"warehouse": "Warehouse 1"}, {"warehouse": "Warehouse 1"}]
+		doc.items = [
+			{"warehouse": "Warehouse 1"},
+			{"warehouse": "Warehouse 1"},
+			{"warehouse": "Warehouse 1"},
+		]
 		doc.reset_default_field_value("set_warehouse", "items", "warehouse")
 		self.assertEqual(doc.set_warehouse, "Warehouse 1")
 
 		# Mixed values
-		doc.items = [{"warehouse": "Warehouse 1"}, {"warehouse": "Warehouse 2"}, {"warehouse": "Warehouse 1"}]
+		doc.items = [
+			{"warehouse": "Warehouse 1"},
+			{"warehouse": "Warehouse 2"},
+			{"warehouse": "Warehouse 1"},
+		]
 		doc.reset_default_field_value("set_warehouse", "items", "warehouse")
 		self.assertEqual(doc.set_warehouse, None)
 
@@ -30,9 +40,13 @@
 			from_warehouse="_Test Warehouse - _TC",
 			to_warehouse="_Test Warehouse 1 - _TC",
 			items=[
-				frappe._dict(item_code="_Test Item", qty=1, basic_rate=200, s_warehouse="_Test Warehouse - _TC"),
-				frappe._dict(item_code="_Test FG Item", qty=4, t_warehouse="_Test Warehouse 1 - _TC", is_finished_item=1)
-			]
+				frappe._dict(
+					item_code="_Test Item", qty=1, basic_rate=200, s_warehouse="_Test Warehouse - _TC"
+				),
+				frappe._dict(
+					item_code="_Test FG Item", qty=4, t_warehouse="_Test Warehouse 1 - _TC", is_finished_item=1
+				),
+			],
 		)
 		se.save()
 
@@ -43,18 +57,20 @@
 		se.delete()
 
 	def test_reset_default_field_value_in_transfer_stock_entry(self):
-		doc = frappe.get_doc({
-			"doctype": "Stock Entry",
-			"purpose": "Material Receipt",
-			"from_warehouse": "Warehouse 1",
-			"to_warehouse": "Warehouse 2",
-		})
+		doc = frappe.get_doc(
+			{
+				"doctype": "Stock Entry",
+				"purpose": "Material Receipt",
+				"from_warehouse": "Warehouse 1",
+				"to_warehouse": "Warehouse 2",
+			}
+		)
 
 		# Same values
 		doc.items = [
 			{"s_warehouse": "Warehouse 1", "t_warehouse": "Warehouse 2"},
 			{"s_warehouse": "Warehouse 1", "t_warehouse": "Warehouse 2"},
-			{"s_warehouse": "Warehouse 1", "t_warehouse": "Warehouse 2"}
+			{"s_warehouse": "Warehouse 1", "t_warehouse": "Warehouse 2"},
 		]
 
 		doc.reset_default_field_value("from_warehouse", "items", "s_warehouse")
@@ -66,10 +82,10 @@
 		doc.items = [
 			{"s_warehouse": "Warehouse 1", "t_warehouse": "Warehouse 2"},
 			{"s_warehouse": "Warehouse 3", "t_warehouse": "Warehouse 2"},
-			{"s_warehouse": "Warehouse 1", "t_warehouse": "Warehouse 2"}
+			{"s_warehouse": "Warehouse 1", "t_warehouse": "Warehouse 2"},
 		]
 
 		doc.reset_default_field_value("from_warehouse", "items", "s_warehouse")
 		doc.reset_default_field_value("to_warehouse", "items", "t_warehouse")
 		self.assertEqual(doc.from_warehouse, None)
-		self.assertEqual(doc.to_warehouse, "Warehouse 2")
\ No newline at end of file
+		self.assertEqual(doc.to_warehouse, "Warehouse 2")