diff --git a/erpnext/hr/doctype/attendance/test_attendance.py b/erpnext/hr/doctype/attendance/test_attendance.py
index 118cc98..c74967d 100644
--- a/erpnext/hr/doctype/attendance/test_attendance.py
+++ b/erpnext/hr/doctype/attendance/test_attendance.py
@@ -1,10 +1,9 @@
 # Copyright (c) 2015, Frappe Technologies Pvt. Ltd. and Contributors and Contributors
 # See license.txt
 
-import unittest
-
 import frappe
-from frappe.utils import add_days, get_first_day, getdate, nowdate
+from frappe.tests.utils import FrappeTestCase
+from frappe.utils import add_days, get_first_day, getdate, now_datetime, nowdate
 
 from erpnext.hr.doctype.attendance.attendance import (
 	get_month_map,
@@ -16,7 +15,7 @@
 
 test_records = frappe.get_test_records('Attendance')
 
-class TestAttendance(unittest.TestCase):
+class TestAttendance(FrappeTestCase):
 	def test_mark_absent(self):
 		employee = make_employee("test_mark_absent@example.com")
 		date = nowdate()
@@ -74,12 +73,14 @@
 		self.assertNotIn(first_sunday, unmarked_days)
 
 	def test_unmarked_days_as_per_joining_and_relieving_dates(self):
-		first_day = get_first_day(getdate())
+		now = now_datetime()
+		previous_month = now.month - 1
+		first_day = now.replace(day=1).replace(month=previous_month).date()
 
 		doj = add_days(first_day, 1)
 		relieving_date = add_days(first_day, 5)
 		employee = make_employee('test_unmarked_days_as_per_doj@example.com', date_of_joining=doj,
-			date_of_relieving=relieving_date)
+			relieving_date=relieving_date)
 		frappe.db.delete('Attendance', {'employee': employee})
 
 		attendance_date = add_days(first_day, 2)
@@ -104,4 +105,4 @@
 	month_number = date.month
 	for month, number in get_month_map().items():
 		if number == month_number:
-			return month
\ No newline at end of file
+			return month
diff --git a/erpnext/hr/doctype/leave_application/test_leave_application.py b/erpnext/hr/doctype/leave_application/test_leave_application.py
index 6d27f4a..7b3aa49 100644
--- a/erpnext/hr/doctype/leave_application/test_leave_application.py
+++ b/erpnext/hr/doctype/leave_application/test_leave_application.py
@@ -792,4 +792,4 @@
 		order by holiday_date
 	""", (holiday_list, month_start_date, month_end_date))[0][0]
 
-	return first_sunday
\ No newline at end of file
+	return first_sunday
diff --git a/erpnext/projects/report/project_profitability/test_project_profitability.py b/erpnext/projects/report/project_profitability/test_project_profitability.py
index 1eb3d0d..3ca28c1 100644
--- a/erpnext/projects/report/project_profitability/test_project_profitability.py
+++ b/erpnext/projects/report/project_profitability/test_project_profitability.py
@@ -1,6 +1,5 @@
-import unittest
-
 import frappe
+from frappe.tests.utils import FrappeTestCase
 from frappe.utils import add_days, getdate
 
 from erpnext.hr.doctype.employee.test_employee import make_employee
@@ -12,7 +11,7 @@
 from erpnext.projects.report.project_profitability.project_profitability import execute
 
 
-class TestProjectProfitability(unittest.TestCase):
+class TestProjectProfitability(FrappeTestCase):
 	def setUp(self):
 		frappe.db.sql('delete from `tabTimesheet`')
 		emp = make_employee('test_employee_9@salary.com', company='_Test Company')
@@ -67,6 +66,3 @@
 
 		fractional_cost = self.salary_slip.base_gross_pay * utilization
 		self.assertEqual(fractional_cost, row.fractional_cost)
-
-	def tearDown(self):
-		frappe.db.rollback()