diff --git a/components/script/dom/domtokenlist.rs b/components/script/dom/domtokenlist.rs
index b4be05e2f3b..c3834ceeddd 100644
--- a/components/script/dom/domtokenlist.rs
+++ b/components/script/dom/domtokenlist.rs
@@ -158,9 +158,9 @@ impl DOMTokenListMethods for DOMTokenList {
             } else {
                 atoms.remove(pos);
             }
+            // Step 5.
+            self.element.set_atomic_tokenlist_attribute(&self.local_name, atoms);
         }
-        // Step 5.
-        self.element.set_atomic_tokenlist_attribute(&self.local_name, atoms);
         Ok(())
     }
 
diff --git a/tests/wpt/metadata/custom-elements/reactions/DOMTokenList.html.ini b/tests/wpt/metadata/custom-elements/reactions/DOMTokenList.html.ini
deleted file mode 100644
index 5056f704f45..00000000000
--- a/tests/wpt/metadata/custom-elements/reactions/DOMTokenList.html.ini
+++ /dev/null
@@ -1,5 +0,0 @@
-[DOMTokenList.html]
-  type: testharness
-  [replace on DOMTokenList must not enqueue an attributeChanged reaction when the token to replace does not exist in the attribute]
-    expected: FAIL
-