diff --git a/packages/playwright/src/reporters/list.ts b/packages/playwright/src/reporters/list.ts
index 01ec7825ae..f87a7d4fe8 100644
--- a/packages/playwright/src/reporters/list.ts
+++ b/packages/playwright/src/reporters/list.ts
@@ -212,7 +212,7 @@ class ListReporter extends BaseReporter {
   private _appendLine(text: string, prefix: string) {
     const line = prefix + this.fitToScreen(text, prefix);
     if (process.env.PW_TEST_DEBUG_REPORTERS) {
-      process.stdout.write(this._lastRow + ' : ' + line + '\n');
+      process.stdout.write('#' + this._lastRow + ' : ' + line + '\n');
     } else {
       process.stdout.write(line);
       process.stdout.write('\n');
@@ -223,7 +223,7 @@ class ListReporter extends BaseReporter {
   private _updateLine(row: number, text: string, prefix: string) {
     const line = prefix + this.fitToScreen(text, prefix);
     if (process.env.PW_TEST_DEBUG_REPORTERS)
-      process.stdout.write(row + ' : ' + line + '\n');
+      process.stdout.write('#' + row + ' : ' + line + '\n');
     else
       this._updateLineForTTY(row, line);
   }
diff --git a/tests/playwright-test/reporter-list.spec.ts b/tests/playwright-test/reporter-list.spec.ts
index 49f0f2a744..576c84d55c 100644
--- a/tests/playwright-test/reporter-list.spec.ts
+++ b/tests/playwright-test/reporter-list.spec.ts
@@ -72,22 +72,22 @@ for (const useIntermediateMergeReport of [false, true] as const) {
         `,
       }, { reporter: 'list' }, { PW_TEST_DEBUG_REPORTERS: '1', PLAYWRIGHT_LIST_PRINT_STEPS: '1', PLAYWRIGHT_FORCE_TTY: '80' });
       const text = result.output;
-      const lines = text.split('\n').filter(l => l.match(/^\d :/)).map(l => l.replace(/[.\d]+m?s/, 'Xms'));
+      const lines = text.split('\n').filter(l => l.match(/^#.* :/)).map(l => l.replace(/[.\d]+m?s/, 'Xms'));
       lines.pop(); // Remove last item that contains [v] and time in ms.
       expect(lines).toEqual([
-        '0 :      1 a.test.ts:3:15 › passes',
-        '1 :      1.1 passes › outer 1.0',
-        '2 :      1.2 passes › outer 1.0 › inner 1.1',
-        '2 :      1.2 passes › outer 1.0 › inner 1.1 (Xms)',
-        '3 :      1.3 passes › outer 1.0 › inner 1.2',
-        '3 :      1.3 passes › outer 1.0 › inner 1.2 (Xms)',
-        '1 :      1.1 passes › outer 1.0 (Xms)',
-        '4 :      1.4 passes › outer 2.0',
-        '5 :      1.5 passes › outer 2.0 › inner 2.1',
-        '5 :      1.5 passes › outer 2.0 › inner 2.1 (Xms)',
-        '6 :      1.6 passes › outer 2.0 › inner 2.2',
-        '6 :      1.6 passes › outer 2.0 › inner 2.2 (Xms)',
-        '4 :      1.4 passes › outer 2.0 (Xms)',
+        '#0 :      1 a.test.ts:3:15 › passes',
+        '#1 :      1.1 passes › outer 1.0',
+        '#2 :      1.2 passes › outer 1.0 › inner 1.1',
+        '#2 :      1.2 passes › outer 1.0 › inner 1.1 (Xms)',
+        '#3 :      1.3 passes › outer 1.0 › inner 1.2',
+        '#3 :      1.3 passes › outer 1.0 › inner 1.2 (Xms)',
+        '#1 :      1.1 passes › outer 1.0 (Xms)',
+        '#4 :      1.4 passes › outer 2.0',
+        '#5 :      1.5 passes › outer 2.0 › inner 2.1',
+        '#5 :      1.5 passes › outer 2.0 › inner 2.1 (Xms)',
+        '#6 :      1.6 passes › outer 2.0 › inner 2.2',
+        '#6 :      1.6 passes › outer 2.0 › inner 2.2 (Xms)',
+        '#4 :      1.4 passes › outer 2.0 (Xms)',
       ]);
     });
 
@@ -107,22 +107,22 @@ for (const useIntermediateMergeReport of [false, true] as const) {
       });`,
       }, { reporter: 'list' }, { PW_TEST_DEBUG_REPORTERS: '1', PLAYWRIGHT_FORCE_TTY: '80' });
       const text = result.output;
-      const lines = text.split('\n').filter(l => l.match(/^\d :/)).map(l => l.replace(/[.\d]+m?s/, 'Xms'));
+      const lines = text.split('\n').filter(l => l.match(/^#.* :/)).map(l => l.replace(/[.\d]+m?s/, 'Xms'));
       lines.pop(); // Remove last item that contains [v] and time in ms.
       expect(lines).toEqual([
-        '0 :      1 a.test.ts:3:11 › passes',
-        '0 :      1 a.test.ts:4:20 › passes › outer 1.0',
-        '0 :      1 a.test.ts:5:22 › passes › outer 1.0 › inner 1.1',
-        '0 :      1 a.test.ts:4:20 › passes › outer 1.0',
-        '0 :      1 a.test.ts:6:22 › passes › outer 1.0 › inner 1.2',
-        '0 :      1 a.test.ts:4:20 › passes › outer 1.0',
-        '0 :      1 a.test.ts:3:11 › passes',
-        '0 :      1 a.test.ts:8:20 › passes › outer 2.0',
-        '0 :      1 a.test.ts:9:22 › passes › outer 2.0 › inner 2.1',
-        '0 :      1 a.test.ts:8:20 › passes › outer 2.0',
-        '0 :      1 a.test.ts:10:22 › passes › outer 2.0 › inner 2.2',
-        '0 :      1 a.test.ts:8:20 › passes › outer 2.0',
-        '0 :      1 a.test.ts:3:11 › passes',
+        '#0 :      1 a.test.ts:3:11 › passes',
+        '#0 :      1 a.test.ts:4:20 › passes › outer 1.0',
+        '#0 :      1 a.test.ts:5:22 › passes › outer 1.0 › inner 1.1',
+        '#0 :      1 a.test.ts:4:20 › passes › outer 1.0',
+        '#0 :      1 a.test.ts:6:22 › passes › outer 1.0 › inner 1.2',
+        '#0 :      1 a.test.ts:4:20 › passes › outer 1.0',
+        '#0 :      1 a.test.ts:3:11 › passes',
+        '#0 :      1 a.test.ts:8:20 › passes › outer 2.0',
+        '#0 :      1 a.test.ts:9:22 › passes › outer 2.0 › inner 2.1',
+        '#0 :      1 a.test.ts:8:20 › passes › outer 2.0',
+        '#0 :      1 a.test.ts:10:22 › passes › outer 2.0 › inner 2.2',
+        '#0 :      1 a.test.ts:8:20 › passes › outer 2.0',
+        '#0 :      1 a.test.ts:3:11 › passes',
       ]);
     });
 
@@ -143,15 +143,15 @@ for (const useIntermediateMergeReport of [false, true] as const) {
         `,
       }, { reporter: 'list' }, { PW_TEST_DEBUG_REPORTERS: '1', PLAYWRIGHT_LIST_PRINT_STEPS: '1' });
       const text = result.output;
-      const lines = text.split('\n').filter(l => l.match(/^\d :/)).map(l => l.replace(/[.\d]+m?s/, 'Xms'));
+      const lines = text.split('\n').filter(l => l.match(/^#.* :/)).map(l => l.replace(/[.\d]+m?s/, 'Xms'));
       lines.pop(); // Remove last item that contains [v] and time in ms.
       expect(lines).toEqual([
-        '0 :      1.1 a.test.ts:5:26 › passes › outer 1.0 › inner 1.1 (Xms)',
-        '1 :      1.2 a.test.ts:6:26 › passes › outer 1.0 › inner 1.2 (Xms)',
-        '2 :      1.3 a.test.ts:4:24 › passes › outer 1.0 (Xms)',
-        '3 :      1.4 a.test.ts:9:26 › passes › outer 2.0 › inner 2.1 (Xms)',
-        '4 :      1.5 a.test.ts:10:26 › passes › outer 2.0 › inner 2.2 (Xms)',
-        '5 :      1.6 a.test.ts:8:24 › passes › outer 2.0 (Xms)',
+        '#0 :      1.1 a.test.ts:5:26 › passes › outer 1.0 › inner 1.1 (Xms)',
+        '#1 :      1.2 a.test.ts:6:26 › passes › outer 1.0 › inner 1.2 (Xms)',
+        '#2 :      1.3 a.test.ts:4:24 › passes › outer 1.0 (Xms)',
+        '#3 :      1.4 a.test.ts:9:26 › passes › outer 2.0 › inner 2.1 (Xms)',
+        '#4 :      1.5 a.test.ts:10:26 › passes › outer 2.0 › inner 2.2 (Xms)',
+        '#5 :      1.6 a.test.ts:8:24 › passes › outer 2.0 (Xms)',
       ]);
     });
 
@@ -185,13 +185,13 @@ for (const useIntermediateMergeReport of [false, true] as const) {
         `,
       }, { reporter: 'list', retries: '1' }, { PW_TEST_DEBUG_REPORTERS: '1', PLAYWRIGHT_FORCE_TTY: '80' });
       const text = result.output;
-      const lines = text.split('\n').filter(l => l.startsWith('0 :') || l.startsWith('1 :')).map(l => l.replace(/\d+(\.\d+)?m?s/, 'XXms'));
+      const lines = text.split('\n').filter(l => l.startsWith('#0 :') || l.startsWith('#1 :')).map(l => l.replace(/\d+(\.\d+)?m?s/, 'XXms'));
 
       expect(lines).toEqual([
-        `0 :      1 a.test.ts:3:15 › flaky`,
-        `0 :   ${NEGATIVE_STATUS_MARK} 1 a.test.ts:3:15 › flaky (XXms)`,
-        `1 :      2 a.test.ts:3:15 › flaky (retry #1)`,
-        `1 :   ${POSITIVE_STATUS_MARK} 2 a.test.ts:3:15 › flaky (retry #1) (XXms)`,
+        `#0 :      1 a.test.ts:3:15 › flaky`,
+        `#0 :   ${NEGATIVE_STATUS_MARK} 1 a.test.ts:3:15 › flaky (XXms)`,
+        `#1 :      2 a.test.ts:3:15 › flaky (retry #1)`,
+        `#1 :   ${POSITIVE_STATUS_MARK} 2 a.test.ts:3:15 › flaky (retry #1) (XXms)`,
       ]);
     });