diff --git a/css/css-pseudo/WEB_FEATURES.yml b/css/css-pseudo/WEB_FEATURES.yml
index 48685b15329f23..be5ef9df0342e7 100644
--- a/css/css-pseudo/WEB_FEATURES.yml
+++ b/css/css-pseudo/WEB_FEATURES.yml
@@ -35,3 +35,19 @@ features:
 - name: text-stroke-fill
   files:
   - highlight-styling-003.html
+- name: selection
+  files:
+  - active-selection-*
+  - selection-*
+  - svg-text-selection-*
+  - textpath-selection-011.html
+  - highlight-custom-properties-dynamic-001.html
+  - highlight-painting-001.html
+  - highlight-painting-002.html
+  - highlight-painting-005-crash.html
+  - highlight-styling-001.html
+  - highlight-styling-002.html
+  - highlight-styling-004.html
+  - highlight-styling-005.html
+  - highlight-z-index-001.html
+  - highlight-z-index-002.html
diff --git a/css/css-pseudo/highlight-cascade/WEB_FEATURES.yml b/css/css-pseudo/highlight-cascade/WEB_FEATURES.yml
index 5b481b086645e9..980a4aaa6a6bc8 100644
--- a/css/css-pseudo/highlight-cascade/WEB_FEATURES.yml
+++ b/css/css-pseudo/highlight-cascade/WEB_FEATURES.yml
@@ -3,3 +3,23 @@ features:
   files:
   - highlight-cascade-001.html
   - highlight-paired-cascade-005.html
+- name: selection
+  files:
+  - cascade-highlight-001.html
+  - cascade-highlight-002.html
+  - cascade-highlight-004.html
+  - cascade-highlight-005.html
+  - highlight-cascade-003.html
+  - highlight-cascade-004.html
+  - highlight-cascade-005.html
+  - highlight-cascade-006.xhtml
+  - highlight-cascade-007.html
+  - highlight-cascade-008.html
+  - highlight-cascade-009.html
+  - highlight-cascade-011.html
+  - highlight-paired-cascade-001.html
+  - highlight-paired-cascade-002.html
+  - highlight-paired-cascade-003.html
+  - highlight-paired-cascade-006.html
+  - highlight-currentcolor-root-implicit-default-001.html
+  - highlight-currentcolor-root-implicit-default-002.html
diff --git a/css/selectors/WEB_FEATURES.yml b/css/selectors/WEB_FEATURES.yml
index 8eca551c0c255c..93f442f8d7fbf2 100644
--- a/css/selectors/WEB_FEATURES.yml
+++ b/css/selectors/WEB_FEATURES.yml
@@ -87,3 +87,6 @@ features:
 - name: where
   files:
   - pseudo-where-crash.html
+- name: selection
+  files:
+  - selection-image-001.html
diff --git a/css/selectors/old-tests/WEB_FEATURES.yml b/css/selectors/old-tests/WEB_FEATURES.yml
index bf9d5e856e126c..117c596ae5186b 100644
--- a/css/selectors/old-tests/WEB_FEATURES.yml
+++ b/css/selectors/old-tests/WEB_FEATURES.yml
@@ -13,3 +13,6 @@ features:
   files:
   - "css3-modsel-22.xml"
   - "css3-modsel-67.xml"
+- name: selection
+  files:
+  - css3-modsel-159.xml