diff --git a/packages/block-library/src/audio/theme.scss b/packages/block-library/src/audio/theme.scss
index eda394fd6a3d5..ef0520dbce0b2 100644
--- a/packages/block-library/src/audio/theme.scss
+++ b/packages/block-library/src/audio/theme.scss
@@ -2,6 +2,6 @@
 	@include caption-style-theme();
 }
 
-:where(.wp-block-audio) {
+:root :where(.wp-block-audio) {
 	margin: 0 0 1em 0;
 }
diff --git a/packages/block-library/src/cover/style.scss b/packages/block-library/src/cover/style.scss
index d14f606fc0226..7155101ae7c31 100644
--- a/packages/block-library/src/cover/style.scss
+++ b/packages/block-library/src/cover/style.scss
@@ -1,5 +1,5 @@
 // Lowest specificity styles are used to ensure that the default styles for the cover block can be overridden by global styles.
-:where(.wp-block-cover-image, .wp-block-cover) {
+:root :where(.wp-block-cover-image, .wp-block-cover) {
 	min-height: 430px;
 	padding: 1em;
 }
diff --git a/packages/block-library/src/embed/theme.scss b/packages/block-library/src/embed/theme.scss
index 57ece1dcd43ca..92d4f0566b1a3 100644
--- a/packages/block-library/src/embed/theme.scss
+++ b/packages/block-library/src/embed/theme.scss
@@ -2,6 +2,6 @@
 	@include caption-style-theme();
 }
 
-:where(.wp-block-embed) {
+:root :where(.wp-block-embed) {
 	margin: 0 0 1em 0;
 }
diff --git a/packages/block-library/src/image/theme.scss b/packages/block-library/src/image/theme.scss
index 459036511335a..096a8374a91f6 100644
--- a/packages/block-library/src/image/theme.scss
+++ b/packages/block-library/src/image/theme.scss
@@ -2,6 +2,6 @@
 	@include caption-style-theme();
 }
 
-:where(.wp-block-image) {
+:root :where(.wp-block-image) {
 	margin: 0 0 1em 0;
 }
diff --git a/packages/block-library/src/pullquote/theme.scss b/packages/block-library/src/pullquote/theme.scss
index 0dc7943a77051..5ef3f5a636cd1 100644
--- a/packages/block-library/src/pullquote/theme.scss
+++ b/packages/block-library/src/pullquote/theme.scss
@@ -1,4 +1,4 @@
-:where(.wp-block-pullquote) {
+:root :where(.wp-block-pullquote) {
 	border-top: 4px solid currentColor;
 	border-bottom: 4px solid currentColor;
 	margin-bottom: 1.75em;
diff --git a/packages/block-library/src/quote/theme.scss b/packages/block-library/src/quote/theme.scss
index aaf63b899771b..903628c280cd0 100644
--- a/packages/block-library/src/quote/theme.scss
+++ b/packages/block-library/src/quote/theme.scss
@@ -1,4 +1,4 @@
-:where(.wp-block-quote) {
+:root :where(.wp-block-quote) {
 	border-left: 0.25em solid currentColor;
 	margin: 0 0 1.75em 0;
 	padding-left: 1em;
diff --git a/packages/block-library/src/table/theme.scss b/packages/block-library/src/table/theme.scss
index 19dc71c8857bd..e6a5477dce819 100644
--- a/packages/block-library/src/table/theme.scss
+++ b/packages/block-library/src/table/theme.scss
@@ -9,6 +9,6 @@
 	}
 }
 
-:where(.wp-block-table) {
+:root :where(.wp-block-table) {
 	margin: 0 0 1em 0;
 }
diff --git a/packages/block-library/src/template-part/theme.scss b/packages/block-library/src/template-part/theme.scss
index 2f1d3a0a513cb..fd503bbe9b8a4 100644
--- a/packages/block-library/src/template-part/theme.scss
+++ b/packages/block-library/src/template-part/theme.scss
@@ -1,5 +1,5 @@
 // Same as the group block styles.
-:where(.wp-block-template-part) {
+:root :where(.wp-block-template-part) {
 	&.has-background {
 		// Matches paragraph Block padding
 		padding: $block-bg-padding--v $block-bg-padding--h;
diff --git a/packages/block-library/src/video/theme.scss b/packages/block-library/src/video/theme.scss
index c5399582bbb28..84d50a76bcc14 100644
--- a/packages/block-library/src/video/theme.scss
+++ b/packages/block-library/src/video/theme.scss
@@ -2,6 +2,6 @@
 	@include caption-style-theme();
 }
 
-:where(.wp-block-video) {
+:root :where(.wp-block-video) {
 	margin: 0 0 1em 0;
 }