diff --git a/tests/test_class_repository.py b/tests/test_class_repository.py
index 45dcd29..2e457c3 100644
--- a/tests/test_class_repository.py
+++ b/tests/test_class_repository.py
@@ -231,11 +231,26 @@ class TestClassRepository:
             db.session.add(class_group)
             db.session.commit()
             
-            students = [
-                Student(first_name="Jean", last_name="Dupont", class_group_id=class_group.id),
-                Student(first_name="Marie", last_name="Martin", class_group_id=class_group.id),
-            ]
-            db.session.add_all(students)
+            # Créer les étudiants (sans class_group_id dans le système temporel)
+            student1 = Student(first_name="Jean", last_name="Dupont")
+            student2 = Student(first_name="Marie", last_name="Martin")
+            db.session.add_all([student1, student2])
+            db.session.commit()
+            
+            # Créer les inscriptions temporelles
+            from models import StudentEnrollment
+            from datetime import date
+            enrollment1 = StudentEnrollment(
+                student_id=student1.id,
+                class_group_id=class_group.id,
+                enrollment_date=date(2023, 9, 1)
+            )
+            enrollment2 = StudentEnrollment(
+                student_id=student2.id, 
+                class_group_id=class_group.id,
+                enrollment_date=date(2023, 9, 1)
+            )
+            db.session.add_all([enrollment1, enrollment2])
             db.session.commit()
             
             # Test