diff --git a/apps/e2e/tests/impersonation.spec.ts b/apps/e2e/tests/impersonation.spec.ts
index b1abb26..b30dc19 100644
--- a/apps/e2e/tests/impersonation.spec.ts
+++ b/apps/e2e/tests/impersonation.spec.ts
@@ -31,10 +31,21 @@ test.describe("ImpersonationBanner", () => {
     await page.route("**/api/impersonation/sessions/session-1/audit-log", (route) =>
       route.fulfill({ json: { logs: [] } })
     );
-    // Portal session endpoints needed when CustomerPortal fetches client profile after session is established
-    // FIX: nest session data under 'session' key so CustomerPortal.tsx can read data.session
+    // Portal session endpoint: CustomerPortal.tsx expects a FLAT ImpersonationSession object
     await page.route("POST **/api/portal/dev-session", (route) =>
-      route.fulfill({ json: { session: { id: "session-1", client: { id: "client-1", name: "Carol Client" } } } })
+      route.fulfill({
+        json: {
+          id: "session-1",
+          staffId: "staff-1",
+          clientId: "client-1",
+          reason: null,
+          status: "active",
+          startedAt: new Date().toISOString(),
+          endedAt: null,
+          expiresAt: new Date(Date.now() + 3600000).toISOString(),
+          createdAt: new Date().toISOString(),
+        },
+      })
     );
     await page.route("GET **/api/portal/me", (route) =>
       route.fulfill({ json: { id: "client-1", name: "Carol Client", email: "carol@test.com" } })