diff --git a/app/voltastics_test.ts b/app/voltastics_test.ts
index 7fe120f0eaf97be3d17c664ed958dc7b9bafed81..7d180c823fbbe709a4647b5e52b113b1dc01c5be 100644
--- a/app/voltastics_test.ts
+++ b/app/voltastics_test.ts
@@ -149,7 +149,7 @@ const queryCategories = async (
 };
 
 const voltasticsConfigMock: VoltasticsConfig = {
-  baseUrl: "https://backend.voltastics.com/api",
+  baseUrl: "https://test.com/api",
   apiToken: "ABC123",
 };
 
@@ -178,7 +178,7 @@ describe("voltastics", () => {
       });
 
       const expectedUrl = new URL(
-        "https://backend.voltastics.com/api/searchengagement?limit=10&offset=20&city=Hamburg",
+        "https://test.com/api/searchengagement?limit=10&offset=20&city=Hamburg",
       );
 
       const expectedHeaders = { headers: { "x-voltastics-token": "ABC123" } };
@@ -193,7 +193,7 @@ describe("voltastics", () => {
       await fetchEngagements(serverConfigMock)({ limit: 10, offset: 20 });
 
       const expectedUrl = new URL(
-        "https://backend.voltastics.com/api/searchengagement?limit=10&offset=20&city=ALL_CITIES",
+        "https://test.com/api/searchengagement?limit=10&offset=20&city=ALL_CITIES",
       );
 
       const expectedHeaders = { headers: { "x-voltastics-token": "ABC123" } };
@@ -255,7 +255,7 @@ describe("voltastics", () => {
       });
 
       const expectedUrl = new URL(
-        "https://backend.voltastics.com/api/engagement?id=92403",
+        "https://test.com/api/engagement?id=92403",
       );
       const expectedHeaders = { headers: { "x-voltastics-token": "ABC123" } };
 
diff --git a/app/voltastics_test_data.ts b/app/voltastics_test_data.ts
index 36d87b24dd45e01e26a5ced59d56838130ebb908..3b71c15d19c45f9729f453aaff7572f32ae6ad8b 100644
--- a/app/voltastics_test_data.ts
+++ b/app/voltastics_test_data.ts
@@ -14,7 +14,7 @@ export const apiSearchEngagement1: ApiSearchEngagement = {
   id: 92403,
 
   image:
-    "https://backend.voltastics.de/search/image?id=92403-ehrenamtliche-reisebegleiter-innen-fur-menschen-mit-beeintrachtigungen-gesucht",
+    "https://test.com/search/image?id=92403-ehrenamtliche-reisebegleiter-innen-fur-menschen-mit-beeintrachtigungen-gesucht",
   latitude: null,
   link:
     "https://www.aktion-mensch.de/was-du-tun-kannst/ehrenamt/engagement-plattform#/lokale-angebote/6cf87740-ea8f-4f1d-a725-86afb75053a1?utm_source=voltastics",
@@ -39,7 +39,7 @@ export const apiSearchEngagement1: ApiSearchEngagement = {
 export const apiSearchEngagement2: ApiSearchEngagement = {
   id: 75434,
   image:
-    "https://backend.voltastics.de/search/image?id=75434-ehrenamt-im-ambulanten-kinderhospizdienst-hhansestrolche",
+    "https://test.com/search/image?id=75434-ehrenamt-im-ambulanten-kinderhospizdienst-hhansestrolche",
   latitude: null,
   link:
     "https://www.aktion-mensch.de/was-du-tun-kannst/ehrenamt/engagement-plattform#/lokale-angebote/f55690cd-e982-4f28-afa6-a9f1b87d8c11?utm_source=voltastics",