diff --git a/lostplaces/lostplaces_app/admin.py b/lostplaces/lostplaces_app/admin.py
index 5d53ab7..dc52e86 100644
--- a/lostplaces/lostplaces_app/admin.py
+++ b/lostplaces/lostplaces_app/admin.py
@@ -6,15 +6,15 @@
 from django.contrib import admin
 from django.contrib.auth import get_user_model
 from django.contrib.auth.admin import UserAdmin
-from .models import *
+from lostplaces_app.models import *
 
-from .forms import ExplorerCreationForm, ExplorerChangeForm
+from lostplaces_app.forms import ExplorerCreationForm, ExplorerChangeForm
 
 # Register your models here.
 
 class VoucherAdmin(admin.ModelAdmin):
-    fields = ['code', 'expires', 'created']
-    readonly_fields = ['created']
+    fields = ['code', 'expires_when', 'created_when']
+    readonly_fields = ['created_when']
 
 admin.site.register(Explorer)
 admin.site.register(Voucher, VoucherAdmin)
diff --git a/lostplaces/lostplaces_app/models.py b/lostplaces/lostplaces_app/models.py
index 8e1885a..b40462b 100644
--- a/lostplaces/lostplaces_app/models.py
+++ b/lostplaces/lostplaces_app/models.py
@@ -33,7 +33,7 @@ class Explorer(models.Model):
     )
 
     def __str__(self):
-        return self.user.name
+        return self.user.username
         
 @receiver(post_save, sender=User)
 def create_user_profile(sender, instance, created, **kwargs):
@@ -54,11 +54,11 @@ class Voucher(models.Model):
     """
 
     code = models.CharField(unique=True, max_length=30)
-    created = models.DateTimeField(auto_now_add=True)
-    expires = models.DateField()
+    created_when = models.DateTimeField(auto_now_add=True)
+    expires_when = models.DateTimeField()
 
     def __str__(self):
-        return "Voucher " + str(self.pk)
+        return "Voucher " + str(self.code)
 
 
 class Place (models.Model):
diff --git a/lostplaces/lostplaces_app/tests/models/test_voucher_model.py b/lostplaces/lostplaces_app/tests/models/test_voucher_model.py
index ffc0c93..b343f0b 100644
--- a/lostplaces/lostplaces_app/tests/models/test_voucher_model.py
+++ b/lostplaces/lostplaces_app/tests/models/test_voucher_model.py
@@ -2,6 +2,7 @@ import datetime
 
 from django.test import TestCase
 from django.db import models
+from django.utils import timezone
 
 from lostplaces_app.models import Voucher
 from lostplaces_app.tests.models import ModelTestCase
@@ -14,9 +15,9 @@ class VoucheTestCase(ModelTestCase, TestCase):
     def setUpTestData(cls):
         Voucher.objects.create(
         code='ayDraJCCwfhcFiYmSR5GrcjcchDfcahv',
-        expires=datetime.datetime.now() + datetime.timedelta(days=1)
+        expires_when=timezone.now() + datetime.timedelta(days=1)
     )
-
+    
     def test_voucher_code(self):
         self._test_char_field(
             'code',
@@ -45,4 +46,4 @@ class VoucheTestCase(ModelTestCase, TestCase):
             msg='Expecting %s.__str__ to contain the voucher code' % (
                 self.model_name
             )
-        )
\ No newline at end of file
+        )
diff --git a/lostplaces/lostplaces_app/urls.py b/lostplaces/lostplaces_app/urls.py
index fabf191..2e7262d 100644
--- a/lostplaces/lostplaces_app/urls.py
+++ b/lostplaces/lostplaces_app/urls.py
@@ -1,5 +1,5 @@
 from django.urls import path
-from .views import (
+from lostplaces_app.views import (
     HomeView, 
     PlaceDetailView, 
     PlaceListView,