diff --git a/WebDriver/Driver.php b/WebDriver/Driver.php
index 027f382..e2f141f 100644
--- a/WebDriver/Driver.php
+++ b/WebDriver/Driver.php
@@ -127,7 +127,7 @@ public function running_at_browserstack() {
   }
   
   public function running_at_testingbot() {
-    return (strpost($this->server_url, "testingbot.com") !== false);
+    return (strpos($this->server_url, "testingbot.com") !== false);
   }
 
   public function sauce_url() {