diff --git a/src/openklant/components/contactgegevens/api/tests/test_apis.py b/src/openklant/components/contactgegevens/api/tests/test_apis.py
index caf65d2c..ab47d877 100644
--- a/src/openklant/components/contactgegevens/api/tests/test_apis.py
+++ b/src/openklant/components/contactgegevens/api/tests/test_apis.py
@@ -199,6 +199,19 @@ def test_update_partial_persoon(self):
         )
         self.assertEqual(data["land"], "5001")
 
+    def test_list_pagination_pagesize_param(self):
+        list_url = reverse("contactgegevens:persoon-list")
+        PersoonFactory.create_batch(10)
+
+        response = self.client.get(list_url, {"pageSize": 5})
+
+        self.assertEqual(response.status_code, status.HTTP_200_OK)
+
+        data = response.json()
+        self.assertEqual(data["count"], 10)
+        self.assertEqual(len(data["results"]), 5)
+        self.assertEqual(data["next"], f"http://testserver{list_url}?page=2&pageSize=5")
+
 
 class OrganisatiesTests(APITestCase):
     def test_create_organisatie(self):
@@ -365,3 +378,16 @@ def test_update_partial_organisatie(self):
             },
         )
         self.assertEqual(data["land"], "5001")
+
+    def test_list_pagination_pagesize_param(self):
+        list_url = reverse("contactgegevens:organisatie-list")
+        OrganisatieFactory.create_batch(10)
+
+        response = self.client.get(list_url, {"pageSize": 5})
+
+        self.assertEqual(response.status_code, status.HTTP_200_OK)
+
+        data = response.json()
+        self.assertEqual(data["count"], 10)
+        self.assertEqual(len(data["results"]), 5)
+        self.assertEqual(data["next"], f"http://testserver{list_url}?page=2&pageSize=5")
diff --git a/src/openklant/components/klantinteracties/api/tests/test_actoren.py b/src/openklant/components/klantinteracties/api/tests/test_actoren.py
index 4e6389e9..54d73160 100644
--- a/src/openklant/components/klantinteracties/api/tests/test_actoren.py
+++ b/src/openklant/components/klantinteracties/api/tests/test_actoren.py
@@ -22,6 +22,19 @@ def test_list_actor(self):
         data = response.json()
         self.assertEqual(len(data["results"]), 2)
 
+    def test_list_pagination_pagesize_param(self):
+        list_url = reverse("klantinteracties:actor-list")
+        ActorFactory.create_batch(10)
+
+        response = self.client.get(list_url, {"pageSize": 5})
+
+        self.assertEqual(response.status_code, status.HTTP_200_OK)
+
+        data = response.json()
+        self.assertEqual(data["count"], 10)
+        self.assertEqual(len(data["results"]), 5)
+        self.assertEqual(data["next"], f"http://testserver{list_url}?page=2&pageSize=5")
+
     def test_read_actor(self):
         actor = ActorFactory.create()
         detail_url = reverse(
diff --git a/src/openklant/components/klantinteracties/api/tests/test_digitaal_adres.py b/src/openklant/components/klantinteracties/api/tests/test_digitaal_adres.py
index 321fcf42..a922be81 100644
--- a/src/openklant/components/klantinteracties/api/tests/test_digitaal_adres.py
+++ b/src/openklant/components/klantinteracties/api/tests/test_digitaal_adres.py
@@ -25,6 +25,19 @@ def test_list_digitaal_adres(self):
         data = response.json()
         self.assertEqual(len(data["results"]), 2)
 
+    def test_list_pagination_pagesize_param(self):
+        list_url = reverse("klantinteracties:digitaaladres-list")
+        DigitaalAdresFactory.create_batch(10)
+
+        response = self.client.get(list_url, {"pageSize": 5})
+
+        self.assertEqual(response.status_code, status.HTTP_200_OK)
+
+        data = response.json()
+        self.assertEqual(data["count"], 10)
+        self.assertEqual(len(data["results"]), 5)
+        self.assertEqual(data["next"], f"http://testserver{list_url}?page=2&pageSize=5")
+
     def test_read_digitaal_adres(self):
         digitaal_adres = DigitaalAdresFactory.create()
         detail_url = reverse(
diff --git a/src/openklant/components/klantinteracties/api/tests/test_internetaken.py b/src/openklant/components/klantinteracties/api/tests/test_internetaken.py
index e76fac98..ce258ddb 100644
--- a/src/openklant/components/klantinteracties/api/tests/test_internetaken.py
+++ b/src/openklant/components/klantinteracties/api/tests/test_internetaken.py
@@ -27,6 +27,19 @@ def test_list_internetaak(self):
         data = response.json()
         self.assertEqual(len(data["results"]), 2)
 
+    def test_list_pagination_pagesize_param(self):
+        list_url = reverse("klantinteracties:internetaak-list")
+        InterneTaakFactory.create_batch(10)
+
+        response = self.client.get(list_url, {"pageSize": 5})
+
+        self.assertEqual(response.status_code, status.HTTP_200_OK)
+
+        data = response.json()
+        self.assertEqual(data["count"], 10)
+        self.assertEqual(len(data["results"]), 5)
+        self.assertEqual(data["next"], f"http://testserver{list_url}?page=2&pageSize=5")
+
     def test_read_internetaak(self):
         internetaak = InterneTaakFactory.create()
         detail_url = reverse(
diff --git a/src/openklant/components/klantinteracties/api/tests/test_klantcontacten.py b/src/openklant/components/klantinteracties/api/tests/test_klantcontacten.py
index d9f8dd94..54e9f340 100644
--- a/src/openklant/components/klantinteracties/api/tests/test_klantcontacten.py
+++ b/src/openklant/components/klantinteracties/api/tests/test_klantcontacten.py
@@ -34,6 +34,19 @@ def test_list_klantcontact(self):
             self.assertEqual(data["results"][0]["hadBetrokkenActoren"], [])
             self.assertEqual(data["results"][1]["hadBetrokkenActoren"], [])
 
+    def test_list_pagination_pagesize_param(self):
+        list_url = reverse("klantinteracties:klantcontact-list")
+        KlantcontactFactory.create_batch(10)
+
+        response = self.client.get(list_url, {"pageSize": 5})
+
+        self.assertEqual(response.status_code, status.HTTP_200_OK)
+
+        data = response.json()
+        self.assertEqual(data["count"], 10)
+        self.assertEqual(len(data["results"]), 5)
+        self.assertEqual(data["next"], f"http://testserver{list_url}?page=2&pageSize=5")
+
     def test_read_klantcontact(self):
         actor = ActorFactory.create(
             naam="Phil",
diff --git a/src/openklant/components/klantinteracties/api/tests/test_partijen.py b/src/openklant/components/klantinteracties/api/tests/test_partijen.py
index e2e07a1f..bae2e2f5 100644
--- a/src/openklant/components/klantinteracties/api/tests/test_partijen.py
+++ b/src/openklant/components/klantinteracties/api/tests/test_partijen.py
@@ -54,6 +54,19 @@ def test_list_partij(self):
                 ],
             )
 
+    def test_list_pagination_pagesize_param(self):
+        list_url = reverse("klantinteracties:partij-list")
+        PartijFactory.create_batch(10)
+
+        response = self.client.get(list_url, {"pageSize": 5})
+
+        self.assertEqual(response.status_code, status.HTTP_200_OK)
+
+        data = response.json()
+        self.assertEqual(data["count"], 10)
+        self.assertEqual(len(data["results"]), 5)
+        self.assertEqual(data["next"], f"http://testserver{list_url}?page=2&pageSize=5")
+
     def test_read_partij(self):
         partij = PartijFactory.create()
         detail_url = reverse(
diff --git a/src/openklant/components/klantinteracties/api/tests/test_rekeningnummers.py b/src/openklant/components/klantinteracties/api/tests/test_rekeningnummers.py
index edb9271c..c295cc14 100644
--- a/src/openklant/components/klantinteracties/api/tests/test_rekeningnummers.py
+++ b/src/openklant/components/klantinteracties/api/tests/test_rekeningnummers.py
@@ -22,6 +22,19 @@ def test_list_rekeningnummer(self):
         data = response.json()
         self.assertEqual(len(data["results"]), 2)
 
+    def test_list_pagination_pagesize_param(self):
+        list_url = reverse("klantinteracties:rekeningnummer-list")
+        RekeningnummerFactory.create_batch(10)
+
+        response = self.client.get(list_url, {"pageSize": 5})
+
+        self.assertEqual(response.status_code, status.HTTP_200_OK)
+
+        data = response.json()
+        self.assertEqual(data["count"], 10)
+        self.assertEqual(len(data["results"]), 5)
+        self.assertEqual(data["next"], f"http://testserver{list_url}?page=2&pageSize=5")
+
     def test_read_rekeningnummer(self):
         rekeningnummer = RekeningnummerFactory.create()
         detail_url = reverse(