diff --git a/frontend/e2e/specs/real/flow-run.spec.ts b/frontend/e2e/specs/real/flow-run.spec.ts
index e7235953..bff2eff2 100644
--- a/frontend/e2e/specs/real/flow-run.spec.ts
+++ b/frontend/e2e/specs/real/flow-run.spec.ts
@@ -4,7 +4,9 @@ import { readTerminalBuffer } from '../../helpers/terminal.ts';
 
 test.describe('real backend flow run', { tag: '@real' }, () => {
     test('runs a flow end-to-end through the mock LLM', async ({ page }) => {
-        test.setTimeout(240_000);
+        // Above the sum of the step timeouts below (60+30+90+90+90+60 = 420s); at 240s a legitimately
+        // slow-but-passing real run was killed mid-step with a generic timeout, masking the real state.
+        test.setTimeout(450_000);
 
         const pageErrors: string[] = [];