diff --git a/src/wp-includes/class-wp-theme-json.php b/src/wp-includes/class-wp-theme-json.php
index f73781b2b3..8a06d81d47 100644
--- a/src/wp-includes/class-wp-theme-json.php
+++ b/src/wp-includes/class-wp-theme-json.php
@@ -947,8 +947,7 @@ class WP_Theme_JSON {
 			if ( ! empty( $block_type->styles ) ) {
 				$style_selectors = array();
 				foreach ( $block_type->styles as $style ) {
-					// The style variation classname is duplicated in the selector to ensure that it overrides core block styles.
-					$style_selectors[ $style['name'] ] = static::append_to_selector( '.is-style-' . $style['name'] . '.is-style-' . $style['name'], static::$blocks_metadata[ $block_name ]['selector'] );
+					$style_selectors[ $style['name'] ] = static::append_to_selector( '.is-style-' . $style['name'], static::$blocks_metadata[ $block_name ]['selector'] );
 				}
 				static::$blocks_metadata[ $block_name ]['styleVariations'] = $style_selectors;
 			}