diff --git a/tools/autotest.py b/tools/autotest.py
index 7a7b6a07..a7ef04c2 100755
--- a/tools/autotest.py
+++ b/tools/autotest.py
@@ -205,7 +205,13 @@ try:
 
 	wait.until(expected_conditions.presence_of_element_located((By.ID, 'content')))
 	driver.switch_to.frame(wait.until(expected_conditions.presence_of_element_located((By.ID, 'document'))))
-	wait.until(expected_conditions.presence_of_element_located((By.TAG_NAME, 'tf-app'))).shadow_root
+	# NoSuchShadowRootException
+	while True:
+		try:
+			tf_app = wait.until(expected_conditions.presence_of_element_located((By.TAG_NAME, 'tf-app'))).shadow_root
+			break
+		except:
+			pass
 	driver.switch_to.default_content()
 
 	driver.find_element(By.TAG_NAME, 'tf-navigation').shadow_root.find_element(By.ID, 'logout').click()