diff --git a/layout/reftests/w3c-css/submitted/multicol3/moz-multicol3-column-balancing-break-inside-avoid-1-ref.html b/layout/reftests/w3c-css/submitted/multicol3/moz-multicol3-column-balancing-break-inside-avoid-1-ref.html
index e9b326b22550..c39deb12f00b 100644
--- a/layout/reftests/w3c-css/submitted/multicol3/moz-multicol3-column-balancing-break-inside-avoid-1-ref.html
+++ b/layout/reftests/w3c-css/submitted/multicol3/moz-multicol3-column-balancing-break-inside-avoid-1-ref.html
@@ -10,10 +10,10 @@
         html,body {
             color:black; background-color:white; font-size:16px; padding:0; margin:0;
         }
-	
+
   .colset {
-    -moz-column-count: 3;
-    -moz-column-gap: 0;
+    column-count: 3;
+    column-gap: 0;
     border: solid silver;
     width: 9em;
   }
diff --git a/layout/reftests/w3c-css/submitted/multicol3/moz-multicol3-column-balancing-break-inside-avoid-1.html b/layout/reftests/w3c-css/submitted/multicol3/moz-multicol3-column-balancing-break-inside-avoid-1.html
index 79405c9a2ae4..f18a9ceefa19 100644
--- a/layout/reftests/w3c-css/submitted/multicol3/moz-multicol3-column-balancing-break-inside-avoid-1.html
+++ b/layout/reftests/w3c-css/submitted/multicol3/moz-multicol3-column-balancing-break-inside-avoid-1.html
@@ -12,10 +12,10 @@
         html,body {
             color:black; background-color:white; font-size:16px; padding:0; margin:0;
         }
-	
+
   .colset {
-    -moz-column-count: 3;
-    -moz-column-gap: 0;
+    column-count: 3;
+    column-gap: 0;
     border: solid silver;
     width: 9em;
   }
diff --git a/layout/reftests/w3c-css/submitted/multicol3/multicol-height-002.xht b/layout/reftests/w3c-css/submitted/multicol3/multicol-height-002.xht
index 460c2d43a123..aaf544cb16bb 100644
--- a/layout/reftests/w3c-css/submitted/multicol3/multicol-height-002.xht
+++ b/layout/reftests/w3c-css/submitted/multicol3/multicol-height-002.xht
@@ -13,9 +13,9 @@
     * { margin: 0; }
     div {
       border: double blue 12px;
-      -moz-column-count:2;
-      -moz-column-gap:0;
-      -moz-column-fill: balance;
+      column-count:2;
+      column-gap:0;
+      column-fill: balance;
       height: 150%;
     }
     div > p {
diff --git a/testing/web-platform/tests/css/vendor-imports/mozilla/mozilla-central-reftests/sync-tests.sh b/testing/web-platform/tests/css/vendor-imports/mozilla/mozilla-central-reftests/sync-tests.sh
index 400d83db63c1..813646b5fe73 100755
--- a/testing/web-platform/tests/css/vendor-imports/mozilla/mozilla-central-reftests/sync-tests.sh
+++ b/testing/web-platform/tests/css/vendor-imports/mozilla/mozilla-central-reftests/sync-tests.sh
@@ -23,6 +23,6 @@ fi
 
 rsync -avz --delete --filter=". ./sync-tests-filter" "$MOZTREE"/layout/reftests/w3c-css/submitted/ ./
 sed -i -e 's/^\(\(fails\|needs-focus\|random\|skip\|asserts\|slow\|require-or\|silentfail\|pref\|test-pref\|ref-pref\|fuzzy\)[^ ]* *\?\)\+//;/^default-preferences /d;s/ \?# \?\(TC: \)\?[bB]ug.*//;s/ # Initial mulet triage:.*//' $(find . -name reftest.list)
-sed -i -e 's/-moz-column/column/g;s/-moz-crisp-edges/pixelated/g' $(find . -regex ".*\.\(xht\|xhtml\|html\|css\)")
+sed -i -e 's/-moz-crisp-edges/pixelated/g' $(find . -regex ".*\.\(xht\|xhtml\|html\|css\)")
 git add -A .
 git commit -m"Sync Mozilla tests as of https://hg.mozilla.org/mozilla-central/rev/$MOZREV ." .