diff --git a/cof/management/commands/check_olddata.py b/cof/management/commands/check_olddata.py
index 8fdac0e4..dc1ccd47 100644
--- a/cof/management/commands/check_olddata.py
+++ b/cof/management/commands/check_olddata.py
@@ -31,21 +31,21 @@ class Command(BaseCommand):
     def check_users(self):
         self.stdout.write("* Utilisateurs... ", ending='')
 
-        self.u1 = User.objects.get(username='user1')
+        self.u1 = User.objects.get(username='cbds_user1')
         assert self.u1.profile.login_clipper == 'user1'
         assert self.g_staff in self.u1.groups.all()
         assert self.g_members in self.u1.groups.all()
         assert self.u1.has_perm('cof.buro')
         assert self.u1.has_perm('cof.member')
 
-        self.u2 = User.objects.get(username='user2')
+        self.u2 = User.objects.get(username='cbds_user2')
         assert self.u2.profile.login_clipper == 'user2'
         assert self.g_staff not in self.u2.groups.all()
         assert self.g_members in self.u2.groups.all()
         assert not self.u2.has_perm('cof.buro')
         assert self.u2.has_perm('cof.member')
 
-        self.u3 = User.objects.get(username='user3')
+        self.u3 = User.objects.get(username='cbds_user3')
         assert self.u3.profile.login_clipper == 'user3'
         assert self.g_staff not in self.u3.groups.all()
         assert self.g_members not in self.u3.groups.all()
diff --git a/cof/migrations/0008_py3.py b/cof/migrations/0008_py3.py
index 99aa2f9f..b758e996 100644
--- a/cof/migrations/0008_py3.py
+++ b/cof/migrations/0008_py3.py
@@ -34,13 +34,13 @@ def load_olddata(apps, schema_editor):
     )
 
     # Setup users.
-    u1 = load_user(apps, 'user1', is_cof=True)
+    u1 = load_user(apps, 'cbds_user1', is_cof=True)
     u1.profile.is_buro = True
     u1.profile.save()
 
-    u2 = load_user(apps, 'user2', is_cof=True)
+    u2 = load_user(apps, 'cbds_user2', is_cof=True)
 
-    u3 = load_user(apps, 'user3')
+    u3 = load_user(apps, 'cbds_user3')
 
     # Setup clubs.
     Club = apps.get_model('cof', 'Club')