diff --git a/layout/style/test/test_font_loading_api.html b/layout/style/test/test_font_loading_api.html
index f68dad85e0a6..044eda35fda6 100644
--- a/layout/style/test/test_font_loading_api.html
+++ b/layout/style/test/test_font_loading_api.html
@@ -406,9 +406,6 @@ function runTest() {
 
   }).then(function() {
 
-    // XXX Disabled this sub-test due to intermittent failures (bug 1076803).
-    return;
-
     // (TEST 18) Test passing valid url() source strings to the FontFace
     // constructor.
     var p = Promise.resolve();