diff --git a/frontend/tests/cox.spec.ts b/frontend/tests/cox.spec.ts
index 3ef645e..89da881 100644
--- a/frontend/tests/cox.spec.ts
+++ b/frontend/tests/cox.spec.ts
@@ -121,18 +121,69 @@ test.describe("cox can edit trips", () => {
   });
 
   test("call off trip", async () => {
+    // Someone registers...
+    await sharedPage.goto("/auth/logout");
+    await sharedPage.goto("/auth");
+    await sharedPage.getByPlaceholder("Name").click();
+    await sharedPage.getByPlaceholder("Name").fill("rower");
+    await sharedPage.getByPlaceholder("Name").press("Tab");
+    await sharedPage.getByPlaceholder("Passwort").fill("rower");
+    await sharedPage.getByPlaceholder("Passwort").press("Enter");
+
     await sharedPage.goto("/planned");
+    await sharedPage.getByRole('link', { name: 'Mitrudern' }).nth(1).click();
+
+    
+    // Login as cox again
+    await sharedPage.goto("/auth/logout");
+    await sharedPage.goto("/auth");
+    await sharedPage.getByPlaceholder("Name").click();
+    await sharedPage.getByPlaceholder("Name").fill("cox");
+    await sharedPage.getByPlaceholder("Name").press("Tab");
+    await sharedPage.getByPlaceholder("Passwort").fill("cox");
+    await sharedPage.getByPlaceholder("Passwort").press("Enter");
+
+    await sharedPage.goto("/planned");
+
+
+    // ... now I can cancel trip
     await sharedPage.getByRole("link", { name: "Details" }).nth(1).click();
-    await expect(sharedPage.locator("#sidebar")).toContainText(
-      "Freie Plätze: 3",
-    );
-    await sharedPage.getByRole("spinbutton").click();
-    await sharedPage.getByRole("spinbutton").fill("0");
-    await sharedPage.getByRole("button", { name: "Speichern" }).click();
+    await sharedPage.getByRole("button", { name: "Ausfahrt absagen" }).click();
     await expect(sharedPage.locator("body")).toContainText(
       "Ausfahrt erfolgreich aktualisiert.",
     );
     await expect(sharedPage.locator("body")).toContainText("(Absage cox)");
+
+
+    // Done with the test -> cancel the cancellation of the trip, otherwise the afterAll function below fails
+    await sharedPage.getByRole("link", { name: "Details" }).nth(1).click();
+    await sharedPage.getByRole("spinbutton").click();
+    await sharedPage.getByRole("spinbutton").fill("3");
+    await sharedPage.getByRole("button", { name: "Speichern" }).click();
+
+
+
+    // deregistering
+    await sharedPage.goto("/auth/logout");
+    await sharedPage.goto("/auth");
+    await sharedPage.getByPlaceholder("Name").click();
+    await sharedPage.getByPlaceholder("Name").fill("rower");
+    await sharedPage.getByPlaceholder("Name").press("Tab");
+    await sharedPage.getByPlaceholder("Passwort").fill("rower");
+    await sharedPage.getByPlaceholder("Passwort").press("Enter");
+
+    await sharedPage.goto("/planned");
+    await sharedPage.getByRole('link', { name: 'Abmelden' }).click();
+
+
+    // now cox can delete trip again in afterAll
+    await sharedPage.goto("/auth/logout");
+    await sharedPage.goto("/auth");
+    await sharedPage.getByPlaceholder("Name").click();
+    await sharedPage.getByPlaceholder("Name").fill("cox");
+    await sharedPage.getByPlaceholder("Name").press("Tab");
+    await sharedPage.getByPlaceholder("Passwort").fill("cox");
+    await sharedPage.getByPlaceholder("Passwort").press("Enter");
   });
 
   test.afterAll(async () => {