message: Use replace let with const in a couple of places in the tests.
diff: @@ -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);
  