--- a/servo/components/style/matching.rs
+++ b/servo/components/style/matching.rs
@@ -1007,38 +1007,38 @@ pub trait MatchMethods : TElement {
         // Animation restyle hints are processed prior to other restyle
         // hints in the animation-only traversal.
         //
         // Non-animation restyle hints will be processed in a subsequent
         // normal traversal.
         if replacements.intersects(RestyleReplacements::for_animations()) {
             debug_assert!(context.shared.traversal_flags.for_animation_only());
 
-            if replacements.contains(RESTYLE_SMIL) {
+            if replacements.intersects(RESTYLE_SMIL) {
                 replace_rule_node(CascadeLevel::SMILOverride,
                                   self.get_smil_override(),
                                   primary_rules);
             }
 
             let mut replace_rule_node_for_animation = |level: CascadeLevel,
                                                        primary_rules: &mut StrongRuleNode| {
                 let animation_rule = self.get_animation_rule_by_cascade(level);
                 replace_rule_node(level,
                                   animation_rule.as_ref(),
                                   primary_rules);
             };
 
             // Apply Transition rules and Animation rules if the corresponding restyle hint
             // is contained.
-            if replacements.contains(RESTYLE_CSS_TRANSITIONS) {
+            if replacements.intersects(RESTYLE_CSS_TRANSITIONS) {
                 replace_rule_node_for_animation(CascadeLevel::Transitions,
                                                 primary_rules);
             }
 
-            if replacements.contains(RESTYLE_CSS_ANIMATIONS) {
+            if replacements.intersects(RESTYLE_CSS_ANIMATIONS) {
                 replace_rule_node_for_animation(CascadeLevel::Animations,
                                                 primary_rules);
             }
         }
 
         false
     }