diff --git a/packages/extension/src/extension.ts b/packages/extension/src/extension.ts
index dae2df4..bcad937 100644
--- a/packages/extension/src/extension.ts
+++ b/packages/extension/src/extension.ts
@@ -347,7 +347,7 @@ class VitestExtension {
       vscode.commands.registerCommand('vitest.openOutput', () => {
         log.openOutput()
       }),
-      vscode.commands.registerCommand('vitest.openTraceReport', (testItem?: vscode.TestItem) =>
+      vscode.commands.registerCommand('vitest.openTraceReport', (testItem: vscode.TestItem) =>
         this.traceReports.open(testItem),
       ),
       vscode.commands.registerCommand('vitest.runRelatedTests', async (uri?: vscode.Uri) => {
diff --git a/packages/extension/src/traceReport.ts b/packages/extension/src/traceReport.ts
index f2c40f0..39f0b2d 100644
--- a/packages/extension/src/traceReport.ts
+++ b/packages/extension/src/traceReport.ts
@@ -41,14 +41,8 @@ export class TraceReportManager {
     )
   }
 
-  async open(testItem: vscode.TestItem | undefined) {
-    const target = testItem && this.targets.get(testItem)
-    if (!target) {
-      await vscode.window.showInformationMessage(
-        'No trace report is available for this test. Run it with browser.traceView and the HTML reporter enabled.',
-      )
-      return
-    }
+  async open(testItem: vscode.TestItem) {
+    const target = this.targets.get(testItem)!
 
     const reportUri = vscode.Uri.file(target.reportPath)
     try {