--- a/layout/style/test/test_garbage_at_end_of_declarations.html
+++ b/layout/style/test/test_garbage_at_end_of_declarations.html
@@ -31,16 +31,17 @@
  * ensures that we don't accept garbage.
  *
  * Despite that, I'm checking it in anyway, since it caught an infinite
  * loop in the patch for bug 435441.
  */
 
 var gElement = document.getElementById("testnode");
 var gDeclaration = gElement.style;
+var gUnsetValueEnabled = SpecialPowers.getBoolPref("layout.css.unset-value.enabled");
 
 /*
  * This lists properties where garbage identifiers are allowed at the
  * end, with values in property_database.js that are exceptions that
  * should be tested anyway.  "inherit", "initial" and "unset" are always
  * tested.
  */
 var gAllowsExtra = {
@@ -114,17 +115,17 @@ function test_property(property)
          ["expected garbage ignored after '", property, ": ", value,
           "'"].join(""));
     }
   }
 
   var idx;
   test_value("inherit");
   test_value("initial");
-  if (SpecialPowers.getBoolPref("layout.css.unset-value.enabled"))
+  if (gUnsetValueEnabled)
     test_value("unset");
   for (idx in info.initial_values)
     test_value(info.initial_values[idx]);
   for (idx in info.other_values)
     test_value(info.other_values[idx]);
 }
 
 // To avoid triggering the slow script dialog, we have to test one

--- a/layout/style/test/test_value_storage.html
+++ b/layout/style/test/test_value_storage.html
@@ -88,17 +88,16 @@ var gElement = document.getElementById("
 var gDeclaration = gElement.style;
 var gComputedStyle = window.getComputedStyle(gElement, "");
 
 var gPrereqDeclaration =
   document.getElementById("prereqsheet").sheet.cssRules[0].style;
 
 function test_property(property)
 {
-  ok(SpecialPowers.getBoolPref("layout.css.variables.enabled"), "pref not set #2");
   var info = gCSSProperties[property];
 
   var test_computed = !("backend_only" in info);
 
   // can all properties be removed from the style?
   function test_remove_all_properties(property, value) {
     var i, p = [];
     for (i = 0; i < gDeclaration.length; i++) p.push(gDeclaration[i]);