diff --git a/components/gfx/tests/font_context.rs b/components/gfx/tests/font_context.rs
index 2f3f12b97b9..3a3f73671ac 100644
--- a/components/gfx/tests/font_context.rs
+++ b/components/gfx/tests/font_context.rs
@@ -119,7 +119,10 @@ fn font_family(names: Vec<&str>) -> FontFamily {
         })
         .collect();
 
-    FontFamily(FontFamilyList::new(names.into_boxed_slice()))
+    FontFamily {
+        families: FontFamilyList::new(names.into_boxed_slice()),
+        is_system_font: false,
+    }
 }
 
 #[test]