diff --git a/css/css-transitions/WEB_FEATURES.yml b/css/css-transitions/WEB_FEATURES.yml
index 4da279daa391f5..fd831030523d7d 100644
--- a/css/css-transitions/WEB_FEATURES.yml
+++ b/css/css-transitions/WEB_FEATURES.yml
@@ -2,3 +2,6 @@ features:
 - name: starting-style
   files:
   - starting-style-*
+- name: transition-behavior
+  files:
+  - transition-behavior.html
diff --git a/css/css-transitions/parsing/WEB_FEATURES.yml b/css/css-transitions/parsing/WEB_FEATURES.yml
index 4da279daa391f5..fd831030523d7d 100644
--- a/css/css-transitions/parsing/WEB_FEATURES.yml
+++ b/css/css-transitions/parsing/WEB_FEATURES.yml
@@ -2,3 +2,6 @@ features:
 - name: starting-style
   files:
   - starting-style-*
+- name: transition-behavior
+  files:
+  - transition-behavior.html