diff --git a/packages/playwright/src/worker/testInfo.ts b/packages/playwright/src/worker/testInfo.ts
index fa71ac1b15..8d93429136 100644
--- a/packages/playwright/src/worker/testInfo.ts
+++ b/packages/playwright/src/worker/testInfo.ts
@@ -455,7 +455,10 @@ export class TestInfoImpl implements TestInfo {
       title: `Attach ${escapeWithQuotes(name, '"')}`,
       category: 'test.attach',
     });
-    this._attach(await normalizeAndSaveAttachment(this.outputPath(), name, options), step.stepId);
+    this._attach(
+        await normalizeAndSaveAttachment(this.outputPath(), name, options),
+        step.group ? undefined : step.stepId
+    );
     step.complete({});
   }
 
diff --git a/tests/playwright-test/reporter-attachment.spec.ts b/tests/playwright-test/reporter-attachment.spec.ts
index 50d6d1ee0c..65a536e77f 100644
--- a/tests/playwright-test/reporter-attachment.spec.ts
+++ b/tests/playwright-test/reporter-attachment.spec.ts
@@ -322,3 +322,30 @@ test('render text attachment with multiple lines', async ({ runInlineTest }) =>
   expect(text).toContain('    ────────────────────────────────────────────────────────────────────────────────────────────────');
   expect(result.exitCode).toBe(1);
 });
+
+test('attaching inside boxed fixture should not log error', { annotation: { type: 'issue', description: 'https://github.com/microsoft/playwright/issues/37147' } }, async ({ runInlineTest }) => {
+  const result = await runInlineTest({
+    'a.test.ts': `
+      import { test as base } from '@playwright/test';
+
+      const test = base.extend<{ myFixture: void }>({
+        myFixture: [async ({}, use, testInfo) => {
+          await testInfo.attach('my attachment', {
+            body: 'foo',
+            contentType: 'text/plain',
+          });
+          await use();
+        }, { box: true }],
+      });
+
+      test('my test', ({ myFixture }) => {
+        expect(1).toBe(0);
+      });
+    `,
+  }, { reporter: 'line' }, {});
+  const text = result.output;
+  expect(text).toContain('    attachment #1: my attachment (text/plain) ──────────────────────────────────────────────────────');
+  expect(text).toContain('    foo');
+  expect(text).toContain('    ────────────────────────────────────────────────────────────────────────────────────────────────');
+  expect(result.exitCode).toBe(1);
+});
diff --git a/tests/playwright-test/ui-mode-test-attachments.spec.ts b/tests/playwright-test/ui-mode-test-attachments.spec.ts
index 6d466acec5..4984afd9fc 100644
--- a/tests/playwright-test/ui-mode-test-attachments.spec.ts
+++ b/tests/playwright-test/ui-mode-test-attachments.spec.ts
@@ -173,6 +173,35 @@ test('should link from attachment step to attachments view', async ({ runUITest
   await expect(attachment).toBeInViewport();
 });
 
+test('attachments from inside boxed fixture should be visible', { annotation: { type: 'issue', description: 'https://github.com/microsoft/playwright/issues/37147' } }, async ({ runUITest }) => {
+  const { page } = await runUITest({
+    'a.test.ts': `
+      import { test as base } from '@playwright/test';
+
+      const test = base.extend<{ myFixture: void }>({
+        myFixture: [async ({}, use, testInfo) => {
+          await testInfo.attach('my attachment', {
+            body: 'foo',
+            contentType: 'text/plain',
+          });
+          await use();
+        }, { box: true }],
+      });
+
+      test('my test', ({ myFixture }) => {});
+    `,
+  }, { reporter: 'line' }, {});
+  await page.getByText('my test').click();
+  await page.getByTitle('Run all').click();
+  await expect(page.getByTestId('status-line')).toHaveText('1/1 passed (100%)');
+
+  await page.getByRole('treeitem', { name: 'attach "my attachment"' }).getByLabel('Open Attachment').click();
+  await expect(page.getByRole('tabpanel', { name: 'Attachments' })).toMatchAriaSnapshot(`
+    - tabpanel:
+      - button /my attachment/
+  `);
+});
+
 function readAllFromStream(stream: NodeJS.ReadableStream): Promise<Buffer> {
   return new Promise(resolve => {
     const chunks: Buffer[] = [];