diff --git a/testing/web-platform/tests/html/dom/elements/global-attributes/dir-shadow-35-ref.html b/testing/web-platform/tests/html/dom/elements/global-attributes/dir-shadow-35-ref.html
index 8b9f8bf7b0970..09f3fcc795306 100644
--- a/testing/web-platform/tests/html/dom/elements/global-attributes/dir-shadow-35-ref.html
+++ b/testing/web-platform/tests/html/dom/elements/global-attributes/dir-shadow-35-ref.html
@@ -295,10 +295,10 @@
 value
 for
 the
-span
+slot
 is
 :
-rtl
+ltr
 /
 ltr
 .
diff --git a/testing/web-platform/tests/html/dom/elements/global-attributes/dir-shadow-35.html b/testing/web-platform/tests/html/dom/elements/global-attributes/dir-shadow-35.html
index c8f11ebfc163b..0745437e77ca0 100644
--- a/testing/web-platform/tests/html/dom/elements/global-attributes/dir-shadow-35.html
+++ b/testing/web-platform/tests/html/dom/elements/global-attributes/dir-shadow-35.html
@@ -320,7 +320,7 @@
 value
 for
 the
-span
+slot
 is
 :
 <
diff --git a/testing/web-platform/tests/html/dom/elements/global-attributes/dir-shadow-41-ref.html b/testing/web-platform/tests/html/dom/elements/global-attributes/dir-shadow-41-ref.html
index 0c640d9258d83..54b9adcf7b419 100644
--- a/testing/web-platform/tests/html/dom/elements/global-attributes/dir-shadow-41-ref.html
+++ b/testing/web-platform/tests/html/dom/elements/global-attributes/dir-shadow-41-ref.html
@@ -233,7 +233,7 @@
 >
 dir
 =
-ltr
+rtl
 on
 a
 div
@@ -243,7 +243,7 @@
 tree
 dir
 =
-rtl
+ltr
 on
 the
 shadow
@@ -271,7 +271,7 @@
 dir
 =
 "
-rtl
+ltr
 "
 >
 <
@@ -279,16 +279,11 @@
 dir
 =
 "
-ltr
+rtl
 "
 >
 <
 span
-dir
-=
-"
-rtl
-"
 >
 <
 /
diff --git a/testing/web-platform/tests/html/dom/elements/global-attributes/dir-shadow-41.html b/testing/web-platform/tests/html/dom/elements/global-attributes/dir-shadow-41.html
index f9c7c041b5de9..c9ee31bc58d78 100644
--- a/testing/web-platform/tests/html/dom/elements/global-attributes/dir-shadow-41.html
+++ b/testing/web-platform/tests/html/dom/elements/global-attributes/dir-shadow-41.html
@@ -272,7 +272,7 @@
 >
 dir
 =
-ltr
+rtl
 on
 a
 div
@@ -282,7 +282,7 @@
 tree
 dir
 =
-rtl
+ltr
 on
 the
 shadow
@@ -310,7 +310,7 @@
 dir
 =
 "
-rtl
+ltr
 "
 >
 <
@@ -386,7 +386,7 @@
 dir
 =
 "
-ltr
+rtl
 "
 >
 <
@@ -427,7 +427,7 @@
 [
 dir
 =
-ltr
+rtl
 ]
 "
 )
@@ -450,7 +450,7 @@
 [
 dir
 =
-ltr
+rtl
 ]
 "
 )
@@ -475,7 +475,7 @@
 [
 dir
 =
-ltr
+rtl
 ]
 "
 )
diff --git a/testing/web-platform/tests/html/dom/elements/global-attributes/lang-attribute-shadow.window.js b/testing/web-platform/tests/html/dom/elements/global-attributes/lang-attribute-shadow.window.js
index e1e6e20e7623c..191ef5bd33e23 100644
--- a/testing/web-platform/tests/html/dom/elements/global-attributes/lang-attribute-shadow.window.js
+++ b/testing/web-platform/tests/html/dom/elements/global-attributes/lang-attribute-shadow.window.js
@@ -416,8 +416,7 @@ on
 slot
 inherits
 from
-shadow
-host
+parent
 "
 light_tree
 :
@@ -502,7 +501,7 @@ expected
 "
 en
 -
-GB
+CA
 "
 >
 <