diff --git a/assets/checksums.txt b/assets/checksums.txt
index cb102ce4c..84e37a2e6 100644
--- a/assets/checksums.txt
+++ b/assets/checksums.txt
@@ -1,6 +1,6 @@
 6f506c670bd425f4743c3056d5a51d83 assets/ublock/unbreak.txt
 75448208315e80706632ec8a6df0e6d3 assets/ublock/privacy.txt
-93cec249d997a853e86c1f4c7c130360 assets/ublock/filters.txt
+3efbf2097e8dcc30b02eb945c50a2a13 assets/ublock/filters.txt
 d2c1dc3f8c4528e6d6a9083afc30b938 assets/ublock/badware.txt
 c9c5cc56bec563bc1885847f925b9be2 assets/ublock/mirror-candidates.txt
 bf58b93ff4853f6c5bf2aadec2b85916 assets/ublock/filter-lists.json
diff --git a/assets/ublock/filters.txt b/assets/ublock/filters.txt
index d8e2ab68b..7cd867dd8 100644
--- a/assets/ublock/filters.txt
+++ b/assets/ublock/filters.txt
@@ -109,3 +109,7 @@ mail.yahoo.com###inboxcontainer .list-view-items-page > .ml-bg:not(.list-view-it
 #   `important` must be used as there is one EasyList exception preventing
 #   complete block.
 ||username1.link^$important
+
+# https://github.com/gorhill/uBlock/issues/641
+||c.speedtest.net/javascript/speedtest-main.js$important,inline-script,script,image,domain=c.speedtest.net
+speedtest.net###swiffycontainer canvas