diff --git a/packages/playwright/src/reporters/teleEmitter.ts b/packages/playwright/src/reporters/teleEmitter.ts
index eadd2b05a5..76fc1490a6 100644
--- a/packages/playwright/src/reporters/teleEmitter.ts
+++ b/packages/playwright/src/reporters/teleEmitter.ts
@@ -256,7 +256,7 @@ export class TeleReporterEmitter implements ReporterV2 {
       id: (step as any)[this._idSymbol],
       duration: step.duration,
       error: step.error,
-      attachments: step.attachments.map(a => result.attachments.indexOf(a)),
+      attachments: step.attachments.length ? step.attachments.map(a => result.attachments.indexOf(a)) : undefined,
       annotations: step.annotations.length ? step.annotations : undefined,
     };
   }
diff --git a/packages/playwright/src/worker/testTracing.ts b/packages/playwright/src/worker/testTracing.ts
index 15bb17db06..e154d6a649 100644
--- a/packages/playwright/src/worker/testTracing.ts
+++ b/packages/playwright/src/worker/testTracing.ts
@@ -278,6 +278,8 @@ export class TestTracing {
 }
 
 function serializeAttachments(attachments: Attachment[]): trace.AfterActionTraceEvent['attachments'] {
+  if (attachments.length === 0)
+    return undefined;
   return attachments.filter(a => a.name !== 'trace').map(a => {
     return {
       name: a.name,
diff --git a/tests/playwright-test/playwright.trace.spec.ts b/tests/playwright-test/playwright.trace.spec.ts
index 045ad6d419..88995c6f1c 100644
--- a/tests/playwright-test/playwright.trace.spec.ts
+++ b/tests/playwright-test/playwright.trace.spec.ts
@@ -761,7 +761,7 @@ test('should not throw when screenshot on failure fails', async ({ runInlineTest
   expect(result.exitCode).toBe(0);
   expect(result.passed).toBe(1);
   const trace = await parseTrace(testInfo.outputPath('test-results', 'a-has-download-page', 'trace.zip'));
-  const attachedScreenshots = trace.actions.flatMap(a => a.attachments);
+  const attachedScreenshots = trace.actions.filter(a => a.attachments).flatMap(a => a.attachments);
   // One screenshot for the page, no screenshot for the download page since it should have failed.
   expect(attachedScreenshots.length).toBe(1);
 });