UPD: improved tests.

dav_base/tests/generic.py

@@ -1,14 +1,12 @@
 import datetime
 import os
 import sys
-import time
 import urllib
 from unittest import skip, SkipTest
 from django.contrib.staticfiles.testing import StaticLiveServerTestCase
 from django.test import SimpleTestCase, TestCase, tag
 from django.urls import reverse
 from selenium import webdriver
-from selenium.common.exceptions import TimeoutException
 from selenium.webdriver.support.ui import WebDriverWait
 from selenium.webdriver.support import expected_conditions as EC
 
@@ -237,7 +235,7 @@ class ScreenshotTestCase(SeleniumTestCase):
             title = location
 
         base_name = u'{timestamp}-{prefix}{sequence}{title}.png'.format(
-            timestamp=datetime.datetime.now().strftime('%Y%m%d-%H%M%S'),
+            timestamp=datetime.datetime.now().strftime('%Y%m%d-%H%M%S.%f'),
             prefix=self.screenshot_prefix,
             sequence=sequence,
             title=title,