diff --git a/tdrive/backend/node/src/core/platform/services/diagnostics/providers/process.ts b/tdrive/backend/node/src/core/platform/services/diagnostics/providers/process.ts
index 35d085d4..eca74dfc 100644
--- a/tdrive/backend/node/src/core/platform/services/diagnostics/providers/process.ts
+++ b/tdrive/backend/node/src/core/platform/services/diagnostics/providers/process.ts
@@ -1,12 +1,17 @@
 import diagnostics from "../../../framework/api/diagnostics";
 
+export const e2eTestOverride = {
+  // Set to true to force fail to test diagnostic aggregation
+  forceFail: false,
+};
+
 export default () =>
   diagnostics.registerProviders({
     key: "process",
     tags: ["live", "ready"],
     async get() {
       return {
-        ok: true,
+        ok: !e2eTestOverride.forceFail,
         gc: !!global.gc,
         pid: process.pid,
         mem: process.memoryUsage(),
diff --git a/tdrive/backend/node/test/e2e/diagnostics/diagnostics.spec.ts b/tdrive/backend/node/test/e2e/diagnostics/diagnostics.spec.ts
index 685ac62b..b6c0536b 100644
--- a/tdrive/backend/node/test/e2e/diagnostics/diagnostics.spec.ts
+++ b/tdrive/backend/node/test/e2e/diagnostics/diagnostics.spec.ts
@@ -2,6 +2,7 @@ import "reflect-metadata";
 import { afterAll, beforeEach, describe, expect, it, jest } from "@jest/globals";
 import { init, TestPlatform } from "../setup";
 import { getConfig as getDiagnosticsConfig } from "../../../src/core/platform/framework/api/diagnostics";
+import { e2eTestOverride as processDiagnosticProviderE2EOverride } from "../../../src/core/platform/services/diagnostics/providers/process";
 
 describe("The diagnostics infrastucture", () => {
   let platform: TestPlatform;
@@ -48,4 +49,15 @@ describe("The diagnostics infrastucture", () => {
     expect(result.statusCode).toBe(200);
     expect(result.json().ok).toBe(true);
   });
+
+  it("should aggregate failure", async () => {
+    try {
+      processDiagnosticProviderE2EOverride.forceFail = true;
+      const result = await getDiagnosticTags("ready", diagnosticConfig.probeSecret!);
+      expect(result.statusCode).toBe(503);
+      expect(result.json().ok).toBe(false);
+    } finally {
+      processDiagnosticProviderE2EOverride.forceFail = false;
+    }
+  });
 });