--- a/dom/animation/EffectCompositor.cpp
+++ b/dom/animation/EffectCompositor.cpp
@@ -991,18 +991,18 @@ EffectCompositor::PreTraverse()
 bool
 EffectCompositor::PreTraverse(dom::Element* aElement, nsIAtom* aPseudoTagOrNull)
 {
   MOZ_ASSERT(NS_IsMainThread());
   MOZ_ASSERT(mPresContext->RestyleManager()->IsServo());
 
   bool found = false;
   if (aPseudoTagOrNull &&
-      aPseudoTagOrNull != nsGkAtoms::cssPseudoElementBeforeProperty &&
-      aPseudoTagOrNull != nsGkAtoms::cssPseudoElementAfterProperty) {
+      aPseudoTagOrNull != nsCSSPseudoElements::before &&
+      aPseudoTagOrNull != nsCSSPseudoElements::after) {
     return found;
   }
 
   CSSPseudoElementType pseudoType =
     nsCSSPseudoElements::GetPseudoType(aPseudoTagOrNull,
                                        CSSEnabledState::eForAllContent);
 
   PseudoElementHashEntry::KeyType key = { aElement, pseudoType };

--- a/layout/style/ServoBindings.cpp
+++ b/layout/style/ServoBindings.cpp
@@ -453,18 +453,18 @@ Gecko_UpdateAnimations(RawGeckoElementBo
   }
 }
 
 bool
 Gecko_ElementHasCSSAnimations(RawGeckoElementBorrowed aElement,
                               nsIAtom* aPseudoTagOrNull)
 {
   if (aPseudoTagOrNull &&
-      aPseudoTagOrNull != nsGkAtoms::cssPseudoElementBeforeProperty &&
-      aPseudoTagOrNull != nsGkAtoms::cssPseudoElementAfterProperty) {
+      aPseudoTagOrNull != nsCSSPseudoElements::before &&
+      aPseudoTagOrNull != nsCSSPseudoElements::after) {
     return false;
   }
 
   CSSPseudoElementType pseudoType =
     nsCSSPseudoElements::GetPseudoType(aPseudoTagOrNull,
                                        CSSEnabledState::eForAllContent);
   nsAnimationManager::CSSAnimationCollection* collection =
     nsAnimationManager::CSSAnimationCollection