diff --git a/testing/web-platform/tests/css/css-shadow-parts/pseudo-classes-after-part.html b/testing/web-platform/tests/css/css-shadow-parts/pseudo-classes-after-part.html
index 12aacd2730e15..78c6eea215723 100644
--- a/testing/web-platform/tests/css/css-shadow-parts/pseudo-classes-after-part.html
+++ b/testing/web-platform/tests/css/css-shadow-parts/pseudo-classes-after-part.html
@@ -239,20 +239,6 @@
 mypart
 )
 :
-closed
-"
-)
-;
-test_valid_selector
-(
-"
-:
-:
-part
-(
-mypart
-)
-:
 default
 "
 )
diff --git a/testing/web-platform/tests/css/selectors/open-closed-pseudo.html b/testing/web-platform/tests/css/selectors/open-pseudo.html
similarity index 70%
rename from testing/web-platform/tests/css/selectors/open-closed-pseudo.html
rename to testing/web-platform/tests/css/selectors/open-pseudo.html
index 2514a81112a72..148209e347437 100644
--- a/testing/web-platform/tests/css/selectors/open-closed-pseudo.html
+++ b/testing/web-platform/tests/css/selectors/open-pseudo.html
@@ -170,31 +170,6 @@
 '
 )
 ;
-assert_true
-(
-dialog
-.
-matches
-(
-'
-:
-closed
-'
-)
-'
-:
-closed
-should
-match
-when
-the
-dialog
-is
-closed
-.
-'
-)
-;
 assert_false
 (
 dialog
@@ -227,33 +202,6 @@
 (
 )
 ;
-assert_false
-(
-dialog
-.
-matches
-(
-'
-:
-closed
-'
-)
-'
-:
-closed
-should
-not
-match
-after
-dialog
-.
-open
-(
-)
-.
-'
-)
-;
 assert_true
 (
 dialog
@@ -292,33 +240,6 @@
 (
 )
 ;
-assert_false
-(
-dialog
-.
-matches
-(
-'
-:
-closed
-'
-)
-'
-:
-closed
-should
-not
-match
-after
-dialog
-.
-showModal
-(
-)
-.
-'
-)
-;
 assert_true
 (
 dialog
@@ -360,9 +281,6 @@
 support
 :
 open
-and
-:
-closed
 .
 '
 )
@@ -386,31 +304,6 @@
 '
 )
 ;
-assert_true
-(
-details
-.
-matches
-(
-'
-:
-closed
-'
-)
-'
-:
-closed
-should
-match
-when
-the
-details
-is
-closed
-.
-'
-)
-;
 assert_false
 (
 details
@@ -443,32 +336,6 @@
 =
 true
 ;
-assert_false
-(
-details
-.
-matches
-(
-'
-:
-closed
-'
-)
-'
-:
-closed
-should
-not
-match
-when
-the
-details
-is
-open
-.
-'
-)
-;
 assert_true
 (
 details
@@ -503,9 +370,6 @@
 support
 :
 open
-and
-:
-closed
 .
 '
 )
@@ -530,31 +394,6 @@
 '
 )
 ;
-assert_true
-(
-select
-.
-matches
-(
-'
-:
-closed
-'
-)
-'
-:
-closed
-should
-match
-when
-the
-select
-is
-closed
-.
-'
-)
-;
 assert_false
 (
 select
@@ -596,32 +435,6 @@
 requestAnimationFrame
 )
 ;
-assert_false
-(
-select
-.
-matches
-(
-'
-:
-closed
-'
-)
-'
-:
-closed
-should
-not
-match
-when
-the
-select
-is
-open
-.
-'
-)
-;
 assert_true
 (
 select
@@ -656,9 +469,6 @@
 support
 :
 open
-and
-:
-closed
 .
 '
 )
diff --git a/testing/web-platform/tests/html/semantics/forms/the-select-element/select-pseudo-light-dismiss-invalidation.tentative.html b/testing/web-platform/tests/html/semantics/forms/the-select-element/select-pseudo-light-dismiss-invalidation.tentative.html
index 5344c25ab6364..31a9e7bace349 100644
--- a/testing/web-platform/tests/html/semantics/forms/the-select-element/select-pseudo-light-dismiss-invalidation.tentative.html
+++ b/testing/web-platform/tests/html/semantics/forms/the-select-element/select-pseudo-light-dismiss-invalidation.tentative.html
@@ -159,7 +159,11 @@
 }
 select
 :
-closed
+not
+(
+:
+open
+)
 {
 background
 -
@@ -252,7 +256,11 @@
 should
 match
 :
-closed
+not
+(
+:
+open
+)
 at
 the
 start
@@ -330,7 +338,11 @@
 should
 match
 :
-closed
+not
+(
+:
+open
+)
 after
 clicking
 an
@@ -406,7 +418,11 @@
 should
 match
 :
-closed
+not
+(
+:
+open
+)
 after
 light
 dismiss