diff --git a/accounts/models.py b/accounts/models.py
index 2e2f3f2..a12186b 100644
--- a/accounts/models.py
+++ b/accounts/models.py
@@ -19,7 +19,7 @@ class Instructor(models.Model):
     modified = models.DateTimeField(auto_now=True)
 
     def get_absolute_url(self):
-        return reverse('user-detail', kwargs={'pk': self.pk})
+        return reverse('account-detail', kwargs={'pk': self.pk})
 
     def __str__(self):
         return f'{self.user.first_name} {self.user.last_name}'
@@ -34,7 +34,7 @@ class Student(models.Model):
     modified = models.DateTimeField(auto_now=True)
 
     def get_absolute_url(self):
-        return reverse('user-detail', kwargs={'pk': self.pk})
+        return reverse('account-detail', kwargs={'pk': self.pk})
 
     def __str__(self):
         return f'{self.student_number}: {self.user.first_name} {self.user.last_name}'
diff --git a/accounts/templates/accounts/account_list.html b/accounts/templates/accounts/account_list.html
index 0008997..31fe62d 100644
--- a/accounts/templates/accounts/account_list.html
+++ b/accounts/templates/accounts/account_list.html
@@ -9,7 +9,7 @@
                 <tr>
                     <td>{{ user.username }}</td>
                     <td>{{user.first_name}} {{user.last_name}}</td>
-                    <td><a href="{% url 'user-detail' user.id %}">Update</a></td>
+                    <td><a href="{% url 'account-detail' user.id %}">Update</a></td>
                 </tr>
             {% empty %}
                 <tr><td>No users yet.</td></tr>
diff --git a/accounts/tests.py b/accounts/tests.py
index 7ce503c..84401bb 100644
--- a/accounts/tests.py
+++ b/accounts/tests.py
@@ -1,3 +1,108 @@
-from django.test import TestCase
+import json
+from django.test import TestCase, Client
+from django.urls import reverse
+from django.utils import timezone
+from django.contrib.auth.models import User
+from .models import Department, Instructor, Student
 
-# Create your tests here.
+class TestModels(TestCase):
+    def setUp(self):
+        self.peter = User.objects.create_user('Peter Templer', 'peter@testing.com', 'peterspassword321')
+        self.nick = User.objects.create_user('Nick Jenkins', 'nick@testing.com', 'nickspassword321')
+        self.department = Department.objects.create(name = "Blandings Castle")
+        self.student = Student.objects.create(
+            user = self.peter,
+            student_number = 357950,
+            department = self.department,
+        )
+        self.instructor = Instructor.objects.create(
+            user = self.nick,
+            department = self.department,
+        )
+        
+    def test_student_user_relationship(self):
+        self.assertEquals(self.peter, self.student.user)
+
+    def test_student_get_absolute_url(self):
+        url = self.student.get_absolute_url()
+        self.assertEquals(url, '/accounts/1/')
+
+    def test_instructor_user_relationship(self):
+        self.assertEquals(self.nick, self.instructor.user)
+
+    def test_instructor_get_absolute_url(self):
+        url = self.instructor.get_absolute_url()
+        self.assertEquals(url, '/accounts/1/')
+
+class TestViews(TestCase):
+    def setUp(self):
+        self.client = Client()
+        self.reverse_urls = {
+            'list': reverse('account-list'),
+            'create': reverse('account-create'),
+            'detail': reverse('account-detail', args=['1']),
+            'update': reverse('account-update', args=['1']),
+            'delete': reverse('account-delete', args=['1'])
+        }
+
+        self.peter = User.objects.create_user('Peter Templer', 'peter@testing.com', 'peterspassword321')
+        self.nick = User.objects.create_user('Nick Jenkins', 'nick@testing.com', 'nickspassword321')
+        self.department = Department.objects.create(name = "Blandings Castle")
+        self.student = Student.objects.create(
+            user = self.peter,
+            student_number = 357950,
+            department = self.department,
+        )
+        self.instructor = Instructor.objects.create(
+            user = self.nick,
+            department = self.department,
+        )
+        self.client.force_login(self.peter)
+
+    def test_students_list(self):
+        response = self.client.get(self.reverse_urls['list'])
+        self.assertEquals(response.status_code, 200)
+        self.assertTemplateUsed(response, 'accounts/account_list.html')
+
+    def test_students_create_GET(self):
+        response = self.client.get(self.reverse_urls['create'])
+        self.assertEquals(response.status_code, 200)
+        self.assertTemplateUsed(response, 'accounts/account_form.html')
+
+    def test_students_create_POST(self):
+        response = self.client.post(self.reverse_urls['create'], {
+            'user': self.peter.id,
+            'student_number': 357950,
+            'department': self.department,
+        }, follow=True)
+
+        self.assertRedirects(
+            response,
+            reverse('account-detail', args=[self.peter.id]),
+            status_code=302,
+            target_status_code=200,
+            fetch_redirect_response=True
+        )
+
+    def test_students_detail(self):
+        response = self.client.get(self.reverse_urls['detail'])
+        self.assertEquals(response.status_code, 200)
+        self.assertTemplateUsed(response, 'accounts/account_detail.html')
+
+    def test_students_update_GET(self):
+        response = self.client.get(self.reverse_urls['update'])
+        self.assertEquals(response.status_code, 200)
+        self.assertTemplateUsed(response, 'accounts/account_form.html')
+
+    def test_students_update_POST(self):
+        pass
+
+    def test_student_delete(self):
+        response = self.client.get(self.reverse_urls['delete'])
+        self.assertEquals(response.status_code, 200)
+        self.assertTemplateUsed(response, 'accounts/account_confirm_delete.html')
+
+    def test_student_delete(self):
+        response = self.client.delete(self.reverse_urls['delete'], json.dumps({ 'id': 1 }))
+
+        self.assertEquals(response.status_code, 302)
\ No newline at end of file
diff --git a/attendance/tests.py b/attendance/tests.py
index 7ce503c..b7e1499 100644
--- a/attendance/tests.py
+++ b/attendance/tests.py
@@ -1,3 +1,104 @@
-from django.test import TestCase
+from django.test import TestCase, Client
+from django.urls import reverse
+from django.utils import timezone
+from django.contrib.auth.models import User
+from accounts.models import Department, Instructor, Student
+from .models import Code, Period
+from .forms import AttendanceUpdateForm
+
+# Code
+# student
+# station_number
+# Period
+# student
+# station_number
+
+class CodeModelTests(TestCase):
+    def setUp(self):
+        self.peter = User.objects.create_user('Peter Templer', 'peter@testing.com', 'peterspassword321')
+        self.nick = User.objects.create_user('Nick Jenkins', 'nick@testing.com', 'nickspassword321')
+        self.department = Department.objects.create(name = "Blandings Castle")
+        self.student = Student.objects.create(
+            user = self.peter,
+            student_number = 357950,
+            department = self.department,
+        )
+        self.instructor = Instructor.objects.create(
+            user = self.nick,
+            department = self.department,
+        )
+
+        self.code = Code.objects.create(student=self.student, station_number=22)
+
+    def test_code_qr_code_str(self):
+        """test_qr_code_str() returns a string joining on ':' and contains student_number"""
+        self.assertEqual("357950:22", self.code.qr_code_str())
+
+class TestForms(TestCase):
+    def setUp(self):
+        pass
+
+    def test_attendance_update_form(self):
+        form = AttendanceUpdateForm(data={
+            'qr_string': '357950:22'
+        })
+
+        self.assertTrue(form.is_valid())
+
+class TestPeriodViews(TestCase):
+    def setUp(self):
+        self.client = Client()
+        self.reverse_urls = {
+            # 'list': reverse('period-list'),
+            # 'create': reverse('period-create'),
+            'detail': reverse('period-detail', args=['1']),
+            'update': reverse('period-update', args=['1']),
+            'delete': reverse('period-delete', args=['1'])
+        }
+        self.peter = User.objects.create_user('Peter Templer', 'peter@testing.com', 'peterspassword321')
+        self.nick = User.objects.create_user('Nick Jenkins', 'nick@testing.com', 'nickspassword321')
+        self.department = Department.objects.create(name = "Blandings Castle")
+        self.student = Student.objects.create(
+            user = self.peter,
+            student_number = 357950,
+            department = self.department,
+        )
+        self.instructor = Instructor.objects.create(
+            user = self.nick,
+            department = self.department,
+        )
+        self.period = Period.objects.create(
+            student = self.student,
+            station_number = 22,
+        )
+        self.client.force_login(self.peter)
+
+    # def test_period_create_GET(self):
+    #     response = self.client.get(self.reverse_urls['create'])
+    #     self.assertEquals(response.status_code, 200)
+    #     self.assertTemplateUsed(response, 'attendance/period_form.html')
+
+    # def test_period_create_POST(self):
+    #     response = self.client.post(self.reverse_urls['create'], {
+    #         'student': self.student.id,
+    #         'station_number': 22,
+    #     }, follow=True)
+
+        # self.assertRedirects(
+        #     response,
+        #     reverse('period-detail', args=[self.a_shift.id]),
+        #     status_code=302,
+        #     target_status_code=200,
+        #     fetch_redirect_response=True
+        # )
+
+    def test_period_detail(self):
+        response = self.client.get(self.reverse_urls['detail'])
+        self.assertEquals(response.status_code, 200)
+        self.assertTemplateUsed(response, 'attendance/period_detail.html')
+
+    def test_period_update_GET(self):
+        response = self.client.get(self.reverse_urls['update'])
+        self.assertEquals(response.status_code, 200)
+        self.assertTemplateUsed(response, 'attendance/period_form.html')
 
-# Create your tests here.
diff --git a/attendance/views.py b/attendance/views.py
index 22a31da..6943278 100644
--- a/attendance/views.py
+++ b/attendance/views.py
@@ -41,8 +41,10 @@ class AttendanceOverview(LoginRequiredMixin, TemplateView):
                 ).order_by('-clocked_in'
                 ).aggregate(total_duration=Sum('duration'))
 
+            hours = ""
             # Convert to hours floating point
-            hours = round((total_duration['total_duration'].total_seconds() / 3600), 2)
+            if hasattr(total_duration, 'total_duration'):
+                hours = round((total_duration['total_duration'].total_seconds() / 3600), 2)
 
             context['period_list'] = Period.objects.filter(
                 student=self.request.user.student