diff --git a/server/vbv_lernwelt/dashboard/tests/test_views.py b/server/vbv_lernwelt/dashboard/tests/test_views.py
index c98d5ae1..277bbf5b 100644
--- a/server/vbv_lernwelt/dashboard/tests/test_views.py
+++ b/server/vbv_lernwelt/dashboard/tests/test_views.py
@@ -1,4 +1,6 @@
 from django.test import TestCase
+from django.urls import reverse
+from rest_framework.test import APITestCase
 
 from vbv_lernwelt.assignment.models import (
     Assignment,
@@ -9,7 +11,11 @@ from vbv_lernwelt.core.constants import (
     TEST_COURSE_SESSION_BERN_ID,
     TEST_COURSE_SESSION_ZURICH_ID,
     TEST_STUDENT1_USER_ID,
+    TEST_STUDENT2_USER_ID,
+    TEST_STUDENT3_USER_ID,
     TEST_SUPERVISOR1_USER_ID,
+    TEST_TRAINER1_USER_ID,
+    TEST_TRAINER2_USER_ID,
 )
 from vbv_lernwelt.core.create_default_users import create_default_users
 from vbv_lernwelt.core.models import User
@@ -541,3 +547,79 @@ class ExportXlsTestCase(TestCase):
             [(TEST_COURSE_SESSION_ZURICH_ID, [circle_fahrzeug.id, circle_reisen.id])],
             allowed_circles,
         )
+
+
+class PersonsTestCase(APITestCase):
+    def setUp(self):
+        create_default_users()
+        create_test_course(include_uk=True, include_vv=False, with_sessions=True)
+
+        self.student1 = User.objects.get(id=TEST_STUDENT1_USER_ID)
+        self.csu1_student1 = CourseSessionUser.objects.get(
+            user=self.student1, course_session__id=TEST_COURSE_SESSION_BERN_ID
+        )
+        self.student2 = User.objects.get(id=TEST_STUDENT2_USER_ID)
+        self.csu1_student2 = CourseSessionUser.objects.get(
+            user=self.student2, course_session__id=TEST_COURSE_SESSION_ZURICH_ID
+        )
+
+    def test_get_course_sessions_with_roles_for_trainer(self):
+        trainer = User.objects.get(id=TEST_TRAINER1_USER_ID)
+        self.client.force_login(trainer)
+
+        url = reverse(
+            "get_dashboard_persons",
+        )
+
+        response = self.client.get(url)
+
+        self.assertEqual(response.status_code, 200)
+        self.assertEqual(len(response.data), 4)
+        user_ids = [str(user["user_id"]) for user in response.data]
+        self.assertCountEqual(
+            user_ids,
+            [
+                TEST_TRAINER1_USER_ID,
+                TEST_STUDENT1_USER_ID,
+                TEST_STUDENT2_USER_ID,
+                TEST_STUDENT3_USER_ID,
+            ],
+        )
+        user1_index = user_ids.index(TEST_STUDENT1_USER_ID)
+        self.assertEqual(
+            response.data[user1_index]["course_sessions"][0]["id"],
+            str(CourseSession.objects.get(id=TEST_COURSE_SESSION_BERN_ID).id),
+        )
+
+    def test_get_course_sessions_with_roles_for_supervisor(self):
+        supervisor = User.objects.get(id=TEST_SUPERVISOR1_USER_ID)
+        self.client.force_login(supervisor)
+
+        url = reverse(
+            "get_dashboard_persons",
+        )
+
+        response = self.client.get(url)
+
+        self.assertEqual(response.status_code, 200)
+        self.assertEqual(len(response.data), 5)
+        user_ids = [str(user["user_id"]) for user in response.data]
+        self.assertCountEqual(
+            user_ids,
+            [
+                TEST_TRAINER1_USER_ID,
+                TEST_STUDENT1_USER_ID,
+                TEST_STUDENT2_USER_ID,
+                TEST_STUDENT3_USER_ID,
+                TEST_TRAINER2_USER_ID,
+            ],
+        )
+        user2_index = user_ids.index(TEST_STUDENT2_USER_ID)
+        user2_cs = response.data[user2_index]["course_sessions"]
+        self.assertEqual(len(user2_cs), 2)
+
+        user2_cs_ids = [cs["id"] for cs in user2_cs]
+        self.assertCountEqual(
+            user2_cs_ids,
+            [str(TEST_COURSE_SESSION_ZURICH_ID), str(TEST_COURSE_SESSION_BERN_ID)],
+        )
diff --git a/server/vbv_lernwelt/dashboard/views.py b/server/vbv_lernwelt/dashboard/views.py
index 33962032..1cdf533a 100644
--- a/server/vbv_lernwelt/dashboard/views.py
+++ b/server/vbv_lernwelt/dashboard/views.py
@@ -173,6 +173,7 @@ def _create_person_list_with_roles(user):
             "email": user_object.email,
             "avatar_url_small": user_object.avatar_url_small,
             "avatar_url": user_object.avatar_url,
+            "course_sessions": [],
         }
 
     course_sessions = get_course_sessions_with_roles_for_user(user)
@@ -185,10 +186,12 @@ def _create_person_list_with_roles(user):
             )
             my_role = user_role(cs.roles)
             for csu in course_session_users:
-                person_data = create_user_dict(csu.user)
-                person_data["course_sessions"] = [
+                person_data = result_persons.get(
+                    csu.user.id, create_user_dict(csu.user)
+                )
+                person_data["course_sessions"].append(
                     _create_course_session_dict(cs, my_role, csu.role)
-                ]
+                )
                 result_persons[csu.user.id] = person_data
 
     # add persons where request.user is mentor