diff --git a/lib/runner.js b/lib/runner.js
index f2ed8d9..b9ba118 100644
--- a/lib/runner.js
+++ b/lib/runner.js
@@ -178,7 +178,7 @@ async function _executeTest(url, options) {
     };
 
     // Save JSON Summary
-    const jsonPath = path.join(reportDir, `${testId}.json`);
+    let jsonPath = path.join(reportDir, `${testId}.json`);
     fs.writeFileSync(jsonPath, JSON.stringify(summary, null, 2));
     
     // Parse and save HAR data for waterfall