diff --git a/erpnext/assets/doctype/asset_depreciation_schedule/test_asset_depreciation_schedule.py b/erpnext/assets/doctype/asset_depreciation_schedule/test_asset_depreciation_schedule.py
index 107d38057a2..c9fa0ba59da 100644
--- a/erpnext/assets/doctype/asset_depreciation_schedule/test_asset_depreciation_schedule.py
+++ b/erpnext/assets/doctype/asset_depreciation_schedule/test_asset_depreciation_schedule.py
@@ -75,6 +75,116 @@ class TestAssetDepreciationSchedule(FrappeTestCase):
 		]
 		self.assertEqual(schedules, expected_schedules)
 
+	def test_schedule_for_slm_for_existing_asset_daily_pro_rata_enabled(self):
+		frappe.db.set_single_value("Accounts Settings", "calculate_depr_using_total_days", 1)
+		asset = create_asset(
+			calculate_depreciation=1,
+			depreciation_method="Straight Line",
+			available_for_use_date="2023-10-10",
+			is_existing_asset=1,
+			opening_number_of_booked_depreciations=9,
+			opening_accumulated_depreciation=265,
+			depreciation_start_date="2024-07-31",
+			total_number_of_depreciations=24,
+			frequency_of_depreciation=1,
+			gross_purchase_amount=731,
+			daily_prorata_based=1,
+		)
+
+		expected_schedules = [
+			["2024-07-31", 31.0, 296.0],
+			["2024-08-31", 31.0, 327.0],
+			["2024-09-30", 30.0, 357.0],
+			["2024-10-31", 31.0, 388.0],
+			["2024-11-30", 30.0, 418.0],
+			["2024-12-31", 31.0, 449.0],
+			["2025-01-31", 31.0, 480.0],
+			["2025-02-28", 28.0, 508.0],
+			["2025-03-31", 31.0, 539.0],
+			["2025-04-30", 30.0, 569.0],
+			["2025-05-31", 31.0, 600.0],
+			["2025-06-30", 30.0, 630.0],
+			["2025-07-31", 31.0, 661.0],
+			["2025-08-31", 31.0, 692.0],
+			["2025-09-30", 30.0, 722.0],
+			["2025-10-10", 9.0, 731.0],
+		]
+		schedules = [
+			[cstr(d.schedule_date), flt(d.depreciation_amount, 2), d.accumulated_depreciation_amount]
+			for d in get_depr_schedule(asset.name, "Draft")
+		]
+		self.assertEqual(schedules, expected_schedules)
+		frappe.db.set_single_value("Accounts Settings", "calculate_depr_using_total_days", 0)
+
+	def test_schedule_for_slm_for_existing_asset(self):
+		asset = create_asset(
+			calculate_depreciation=1,
+			depreciation_method="Straight Line",
+			available_for_use_date="2023-10-10",
+			is_existing_asset=1,
+			opening_number_of_booked_depreciations=9,
+			opening_accumulated_depreciation=265.30,
+			depreciation_start_date="2024-07-31",
+			total_number_of_depreciations=24,
+			frequency_of_depreciation=1,
+			gross_purchase_amount=731,
+		)
+
+		expected_schedules = [
+			["2024-07-31", 30.46, 295.76],
+			["2024-08-31", 30.46, 326.22],
+			["2024-09-30", 30.46, 356.68],
+			["2024-10-31", 30.46, 387.14],
+			["2024-11-30", 30.46, 417.6],
+			["2024-12-31", 30.46, 448.06],
+			["2025-01-31", 30.46, 478.52],
+			["2025-02-28", 30.46, 508.98],
+			["2025-03-31", 30.46, 539.44],
+			["2025-04-30", 30.46, 569.9],
+			["2025-05-31", 30.46, 600.36],
+			["2025-06-30", 30.46, 630.82],
+			["2025-07-31", 30.46, 661.28],
+			["2025-08-31", 30.46, 691.74],
+			["2025-09-30", 30.46, 722.2],
+			["2025-10-10", 8.8, 731.0],
+		]
+		schedules = [
+			[cstr(d.schedule_date), flt(d.depreciation_amount, 2), d.accumulated_depreciation_amount]
+			for d in get_depr_schedule(asset.name, "Draft")
+		]
+		self.assertEqual(schedules, expected_schedules)
+
+	def test_schedule_sl_method_for_existing_asset_with_frequency_of_3_months(self):
+		asset = create_asset(
+			calculate_depreciation=1,
+			depreciation_method="Straight Line",
+			available_for_use_date="2023-11-01",
+			is_existing_asset=1,
+			opening_number_of_booked_depreciations=4,
+			opening_accumulated_depreciation=223.15,
+			depreciation_start_date="2024-12-31",
+			total_number_of_depreciations=12,
+			frequency_of_depreciation=3,
+			gross_purchase_amount=731,
+		)
+
+		expected_schedules = [
+			["2024-12-31", 60.92, 284.07],
+			["2025-03-31", 60.92, 344.99],
+			["2025-06-30", 60.92, 405.91],
+			["2025-09-30", 60.92, 466.83],
+			["2025-12-31", 60.92, 527.75],
+			["2026-03-31", 60.92, 588.67],
+			["2026-06-30", 60.92, 649.59],
+			["2026-09-30", 60.92, 710.51],
+			["2026-11-01", 20.49, 731.0],
+		]
+		schedules = [
+			[cstr(d.schedule_date), flt(d.depreciation_amount, 2), d.accumulated_depreciation_amount]
+			for d in get_depr_schedule(asset.name, "Draft")
+		]
+		self.assertEqual(schedules, expected_schedules)
+
 	# Enable Checkbox to Calculate depreciation using total days in depreciation period
 	def test_daily_prorata_based_depr_after_enabling_configuration(self):
 		frappe.db.set_single_value("Accounts Settings", "calculate_depr_using_total_days", 1)