diff --git a/tools/chrome_proxy/webdriver/proxy_connection.py b/tools/chrome_proxy/webdriver/proxy_connection.py
index e46545e87d4068..d9f8fd0c7af40c 100644
--- a/tools/chrome_proxy/webdriver/proxy_connection.py
+++ b/tools/chrome_proxy/webdriver/proxy_connection.py
@@ -23,7 +23,7 @@ def VerifyWarmupHistogram(self, test_driver, is_secure_proxy):
         histogram_part)
       histogram = test_driver.GetBrowserHistogram(histogram_name)
       if histogram:
-        self.assertEqual(1, histogram['count'])
+        self.assertLessEqual(1, histogram['count'])
         is_histogram_found = True
     self.assertTrue(is_histogram_found)