diff --git a/.github/workflows/tests_primary.yml b/.github/workflows/tests_primary.yml
index b117bb2267..a76dc9fd3c 100644
--- a/.github/workflows/tests_primary.yml
+++ b/.github/workflows/tests_primary.yml
@@ -131,11 +131,11 @@ jobs:
     - run: npx playwright install --with-deps
     - run: npm run ttest -- --shard ${{ matrix.shard }}
       env:
-        PWTEST_BOT_NAME: "${{ matrix.os }}-node${{ matrix.node-version }}"
+        PWTEST_BOT_NAME: "${{ matrix.os }}-node${{ matrix.node-version }}-${{ matrix.shard }}"
       if: matrix.os != 'ubuntu-latest'
     - run: xvfb-run npm run ttest --  --shard ${{ matrix.shard }}
       env:
-        PWTEST_BOT_NAME: "${{ matrix.os }}-node${{ matrix.node-version }}"
+        PWTEST_BOT_NAME: "${{ matrix.os }}-node${{ matrix.node-version }}-${{ matrix.shard }}"
       if: matrix.os == 'ubuntu-latest'
     - run: ./utils/upload_flakiness_dashboard.sh ./test-results/report.json
       if: always()
diff --git a/packages/playwright/src/reporters/blob.ts b/packages/playwright/src/reporters/blob.ts
index f15fe6f87d..192b639a5a 100644
--- a/packages/playwright/src/reporters/blob.ts
+++ b/packages/playwright/src/reporters/blob.ts
@@ -109,12 +109,14 @@ export class BlobReporter extends TeleReporterEmitter {
   }
 
   private _computeReportName(config: FullConfig) {
-    let reportName = this._options.fileName ?? 'report.zip';
+    if (this._options.fileName)
+      return this._options.fileName;
+    let reportName = 'report';
     if (config.shard) {
       const paddedNumber = `${config.shard.current}`.padStart(`${config.shard.total}`.length, '0');
-      reportName = `${reportName.slice(0, -4)}-${paddedNumber}.zip`;
+      reportName = `${reportName}-${paddedNumber}`;
     }
-    return reportName;
+    return `${reportName}.zip`;
   }
 
   override _serializeAttachments(attachments: TestResult['attachments']): JsonAttachment[] {