diff --git a/backend/tests/test_assets/assignments/assignments.testdata.ts b/backend/tests/test_assets/assignments/assignments.testdata.ts
index 5ac2923b..200d9df2 100644
--- a/backend/tests/test_assets/assignments/assignments.testdata.ts
+++ b/backend/tests/test_assets/assignments/assignments.testdata.ts
@@ -5,6 +5,7 @@ import { Language } from '@dwengo-1/common/util/language';
 
 export function makeTestAssignemnts(em: EntityManager, classes: Class[]): Assignment[] {
     const assignment01 = em.create(Assignment, {
+        id: 21000,
         within: classes[0],
         title: 'dire straits',
         description: 'reading',
@@ -14,6 +15,7 @@ export function makeTestAssignemnts(em: EntityManager, classes: Class[]): Assign
     });
 
     const assignment02 = em.create(Assignment, {
+        id: 21001,
         within: classes[1],
         title: 'tool',
         description: 'reading',
@@ -23,6 +25,7 @@ export function makeTestAssignemnts(em: EntityManager, classes: Class[]): Assign
     });
 
     const assignment03 = em.create(Assignment, {
+        id: 21002,
         within: classes[0],
         title: 'delete',
         description: 'will be deleted',
@@ -32,6 +35,7 @@ export function makeTestAssignemnts(em: EntityManager, classes: Class[]): Assign
     });
 
     const assignment04 = em.create(Assignment, {
+        id: 21003,
         within: classes[0],
         title: 'another assignment',
         description: 'with a description',
diff --git a/backend/tests/test_assets/assignments/groups.testdata.ts b/backend/tests/test_assets/assignments/groups.testdata.ts
index c82887bb..34ca140d 100644
--- a/backend/tests/test_assets/assignments/groups.testdata.ts
+++ b/backend/tests/test_assets/assignments/groups.testdata.ts
@@ -10,7 +10,7 @@ export function makeTestGroups(em: EntityManager, students: Student[], assignmen
      */
     const group01 = em.create(Group, {
         assignment: assignments[0],
-        groupNumber: 1,
+        groupNumber: 21001,
         members: students.slice(0, 2),
     });
 
@@ -20,7 +20,7 @@ export function makeTestGroups(em: EntityManager, students: Student[], assignmen
      */
     const group02 = em.create(Group, {
         assignment: assignments[0],
-        groupNumber: 2,
+        groupNumber: 21002,
         members: students.slice(2, 4),
     });
 
@@ -30,7 +30,7 @@ export function makeTestGroups(em: EntityManager, students: Student[], assignmen
      */
     const group03 = em.create(Group, {
         assignment: assignments[0],
-        groupNumber: 3,
+        groupNumber: 21003,
         members: students.slice(4, 6),
     });
 
@@ -40,7 +40,7 @@ export function makeTestGroups(em: EntityManager, students: Student[], assignmen
      */
     const group04 = em.create(Group, {
         assignment: assignments[1],
-        groupNumber: 4,
+        groupNumber: 21004,
         members: students.slice(3, 4),
     });
 
@@ -50,7 +50,7 @@ export function makeTestGroups(em: EntityManager, students: Student[], assignmen
      */
     const group05 = em.create(Group, {
         assignment: assignments[3],
-        groupNumber: 1,
+        groupNumber: 21001,
         members: students.slice(0, 2),
     });
 
diff --git a/backend/tool/seed.ts b/backend/tool/seed.ts
index 423eca84..78d6dd70 100644
--- a/backend/tool/seed.ts
+++ b/backend/tool/seed.ts
@@ -35,9 +35,6 @@ export async function seedDatabase(): Promise<void> {
     const classes = makeTestClasses(em, students, teachers);
     const assignments = makeTestAssignemnts(em, classes);
 
-    /* Wegens een probleem met het aanmaken van groups werd deze code even in commentaar gezet */
-
-    /*
     const groups = makeTestGroups(em, students, assignments);
 
     assignments[0].groups = new Collection<Group>(groups.slice(0, 3));
@@ -52,7 +49,6 @@ export async function seedDatabase(): Promise<void> {
     const questions = makeTestQuestions(em, students, groups);
     const answers = makeTestAnswers(em, teachers, questions);
     const submissions = makeTestSubmissions(em, students, groups);
-    */
 
     // Persist all entities
     await em.persistAndFlush([
@@ -62,7 +58,6 @@ export async function seedDatabase(): Promise<void> {
         ...learningPaths,
         ...classes,
         ...assignments,
-        /*
         ...groups,
         ...teacherInvitations,
         ...classJoinRequests,
@@ -70,7 +65,6 @@ export async function seedDatabase(): Promise<void> {
         ...questions,
         ...answers,
         ...submissions,
-        */
     ]);
 
     logger.info('Development database seeded successfully!');