diff --git a/gregui/tests/api/views/test_identity.py b/gregui/tests/api/views/test_identity.py
index 3c59514d1f18ff110223fd11c9d36f058a7565e0..efb1907eb3568036e6ef8e09ac7acbc1d2f19791 100644
--- a/gregui/tests/api/views/test_identity.py
+++ b/gregui/tests/api/views/test_identity.py
@@ -40,7 +40,7 @@ def test_identity_check_nonexisting_fnr(
     """Verify that identitycheck endpoint checks iga when queried"""
     settings.IGA_CHECK = True
     requests_mock.get(
-        "http://example.com/cerebrum/v1/search/persons/external-ids?id_type=NO_BIRTHNO&external_id=12345612345",
+        "http://example.com/cerebrum/v1/search/persons/external-ids?id_type=norwegianNationalId&external_id=12345612345",
         json={"external_ids": []},
     )
     log_in(user_sponsor)
@@ -56,7 +56,7 @@ def test_identity_check_existing_fnr(
     """Verify that identitycheck endpoint checks iga when queried"""
     settings.IGA_CHECK = True
     requests_mock.get(
-        "http://example.com/cerebrum/v1/search/persons/external-ids?id_type=NO_BIRTHNO&external_id=12345612345",
+        "http://example.com/cerebrum/v1/search/persons/external-ids?id_type=norwegianNationalId&external_id=12345612345",
         json={
             "external_ids": [
                 {
diff --git a/iga/tests/test_uio.py b/iga/tests/test_uio.py
index 24cd55d7be905c5799b394b7723383485d33037a..d81e6cb7da998752832cbe999184d8bc750815e5 100644
--- a/iga/tests/test_uio.py
+++ b/iga/tests/test_uio.py
@@ -5,7 +5,7 @@ from ..uio import UioCerebrum
 
 def test_uio_search_hit(requests_mock):
     requests_mock.get(
-        "http://example.com/cerebrum/v1/search/persons/external-ids?id_type=NO_BIRTHNO&external_id=123",
+        "http://example.com/cerebrum/v1/search/persons/external-ids?id_type=norwegianNationalId&external_id=123",
         json={
             "external_ids": [
                 {
@@ -18,7 +18,7 @@ def test_uio_search_hit(requests_mock):
         },
     )
     requests_mock.get(
-        "http://example.com/cerebrum/v1/search/persons/external-ids?id_type=PASSNR&external_id=12345",
+        "http://example.com/cerebrum/v1/search/persons/external-ids?id_type=passportNumber&external_id=12345",
         json={
             "external_ids": [
                 {
@@ -60,11 +60,11 @@ def test_uio_search_hit(requests_mock):
 def test_uio_search_miss(requests_mock):
     """Verify no matches returns empty list"""
     requests_mock.get(
-        "http://example.com/cerebrum/v1/search/persons/external-ids?id_type=NO_BIRTHNO&external_id=123",
+        "http://example.com/cerebrum/v1/search/persons/external-ids?id_type=norwegianNationalId&external_id=123",
         json={"external_ids": []},
     )
     requests_mock.get(
-        "http://example.com/cerebrum/v1/search/persons/external-ids?id_type=PASSNR&external_id=12345",
+        "http://example.com/cerebrum/v1/search/persons/external-ids?id_type=passportNumber&external_id=12345",
         json={"external_ids": []},
     )
 
diff --git a/iga/uio.py b/iga/uio.py
index 93abc939d04c4a6a01489f2ea23fd9bf27d97406..6bb9ddb2cc6d72e2d82ae839eedd527154e06113 100644
--- a/iga/uio.py
+++ b/iga/uio.py
@@ -13,8 +13,8 @@ class UioCerebrum(IgaImplementation):
     def __init__(self, config) -> None:
         self.client = CerebrumClient(**config)
         self.idtype2cerebrum = {
-            Identity.IdentityType.NORWEGIAN_NATIONAL_ID_NUMBER: "NO_BIRTHNO",
-            Identity.IdentityType.PASSPORT_NUMBER: "PASSNR",
+            Identity.IdentityType.NORWEGIAN_NATIONAL_ID_NUMBER: "norwegianNationalId",
+            Identity.IdentityType.PASSPORT_NUMBER: "passportNumber",
         }
 
     def extid_search(