diff --git a/packages/web-component-tester/test/integration/browser.ts b/packages/web-component-tester/test/integration/browser.ts
index e600e83c5..2f83f6aa4 100644
--- a/packages/web-component-tester/test/integration/browser.ts
+++ b/packages/web-component-tester/test/integration/browser.ts
@@ -184,8 +184,8 @@ function runsIntegrationSuite(
     describer = describe.only;
   }
   describer(suiteName, function() {
-    let log: string[] = [];
-    let testResults: TestResults = new TestResults();
+    const log: string[] = [];
+    const testResults: TestResults = new TestResults();
 
     before(async function() {
       const suiteRoot = await makeProperTestDir(dirName);
@@ -581,4 +581,4 @@ if (testLocalBrowsers) {
          }
        });
   });
-}
\ No newline at end of file
+}