diff --git a/apps/system-e2e/src/tests/islandis/application-system/acceptance/mocks/parentalLeave.mock.ts b/apps/system-e2e/src/tests/islandis/application-system/acceptance/mocks/parentalLeave.mock.ts
index 8b122fee172a..0190192a4648 100644
--- a/apps/system-e2e/src/tests/islandis/application-system/acceptance/mocks/parentalLeave.mock.ts
+++ b/apps/system-e2e/src/tests/islandis/application-system/acceptance/mocks/parentalLeave.mock.ts
@@ -23,7 +23,7 @@ export const loadParentalLeaveXroadMocks = async () => {
       fulltNafn: 'Gervimaður Afríka',
       kynkodi: '1',
       bannmerking: false,
-      faedingardagur: new Date('1930-01-01T00:00:00'),
+      faedingardagur: '1930-01-01T00:00:00',
       logheimili: {
         heiti: 'Engihjalli 3',
         postnumer: '200',
@@ -52,7 +52,7 @@ export const loadParentalLeaveXroadMocks = async () => {
       fulltNafn: 'Stubbur Maack',
       kynkodi: '3',
       bannmerking: false,
-      faedingardagur: new Date('2011-11-11T00:00:00'),
+      faedingardagur: '2011-11-11T00:00:00',
       logheimili: {
         heiti: 'Engihjalli 3',
         postnumer: '200',
@@ -81,7 +81,7 @@ export const loadParentalLeaveXroadMocks = async () => {
       fulltNafn: 'Gervimaður útlönd',
       kynkodi: '1',
       bannmerking: false,
-      faedingardagur: new Date('1930-01-01T00:00:00'),
+      faedingardagur: '1930-01-01T00:00:00',
       logheimili: {
         heiti: 'Engihjalli 3',
         postnumer: '200',