diff --git a/test/webdriver.spec.ts b/test/webdriver.spec.ts
index 08a8f0002e95fa8ec09dc1b240c027c04e86cea7..80bfd17f35eab5f9d6f84961ee47287950892078 100644
--- a/test/webdriver.spec.ts
+++ b/test/webdriver.spec.ts
@@ -18,11 +18,6 @@
  */
 import { test }   from 'ava'
 
-// import {
-//   Browser
-//   , By
-// }                 from 'selenium-webdriver'
-
 import {
   Bridge,
   Browser,
@@ -54,8 +49,8 @@ test.serial('WebDriver process create & quit test', async t => {
 
     pids = await browser.getBrowserPidList()
     t.is(pids.length, 0, 'no driver process after quit')
-  } catch (err) {
-    t.fail(err.message || err)
+  } catch (e) {
+    t.fail(e.message || e)
   }
 })