diff --git a/layout/reftests/bugs/385569-1-ref.html b/layout/reftests/bugs/385569-1-ref.html
index 5f6e5e7e83e7..ec2297220c78 100644
--- a/layout/reftests/bugs/385569-1-ref.html
+++ b/layout/reftests/bugs/385569-1-ref.html
@@ -1,5 +1,15 @@
 <html>
 <head>
+<style>
+/* explicitly load a font that supports the "fi" ligature */
+@font-face {
+  font-family: test;
+  src: url(../fonts/mplus/mplus-1p-regular.ttf);
+}
+body {
+  font-family: test, serif;
+}
+</style>
 </head>
 
 <body>
diff --git a/layout/reftests/bugs/385569-1a.html b/layout/reftests/bugs/385569-1a.html
index 1fcd544f78be..bf19e467be8c 100644
--- a/layout/reftests/bugs/385569-1a.html
+++ b/layout/reftests/bugs/385569-1a.html
@@ -1,5 +1,15 @@
 <html>
 <head>
+<style>
+/* explicitly load a font that supports the "fi" ligature */
+@font-face {
+  font-family: test;
+  src: url(../fonts/mplus/mplus-1p-regular.ttf);
+}
+body {
+  font-family: test, serif;
+}
+</style>
 <script>
 function m()
 {
diff --git a/layout/reftests/bugs/385569-1b.html b/layout/reftests/bugs/385569-1b.html
index 6d4419daaecc..e6b0dd0eeaec 100644
--- a/layout/reftests/bugs/385569-1b.html
+++ b/layout/reftests/bugs/385569-1b.html
@@ -1,5 +1,15 @@
 <html>
 <head>
+<style>
+/* explicitly load a font that supports the "fi" ligature */
+@font-face {
+  font-family: test;
+  src: url(../fonts/mplus/mplus-1p-regular.ttf);
+}
+body {
+  font-family: test, serif;
+}
+</style>
 <script>
 function m()
 {
diff --git a/layout/reftests/bugs/reftest.list b/layout/reftests/bugs/reftest.list
index ea218efcc23b..95030b85c499 100644
--- a/layout/reftests/bugs/reftest.list
+++ b/layout/reftests/bugs/reftest.list
@@ -682,8 +682,8 @@ random-if(MOZ_WIDGET_TOOLKIT=="cocoa") == 379316-2.html 379316-2-ref.html # bug
 == 384762-1.html about:blank
 == 384876-1.html 384876-1-ref.html
 == 385533-1.html about:blank # assertion test
-== 385569-1a.html 385569-1-ref.html
-== 385569-1b.html 385569-1-ref.html
+HTTP(..) == 385569-1a.html 385569-1-ref.html
+HTTP(..) == 385569-1b.html 385569-1-ref.html
 == 385607-1.html 385607-1-ref.html
 == 385823-1.html 385823-1-ref.html
 == 385823-2a.html 385823-2-ref.html
