diff --git a/tests/unit/CoreQuoteTest.php b/tests/unit/CoreQuoteTest.php
index 7162a127..6024bf26 100644
--- a/tests/unit/CoreQuoteTest.php
+++ b/tests/unit/CoreQuoteTest.php
@@ -164,8 +164,6 @@ public function test_retrieve_core_quote_fields_and_attributes() {
 	 *   - 'style'
 	 *   - 'textColor'
 	 *
-	 * @todo Use `wp_json_encode` for the 'style' attribute to improve accuracy in future tests.
-	 *
 	 * @return void
 	 */
 	public function test_retrieve_core_quote_attributes() {
@@ -207,6 +205,19 @@ public function test_retrieve_core_quote_attributes() {
 		$this->assertEmpty( $block['parentClientId'], 'There should be no parentClientId' );
 		$this->assertNotEmpty( $block['renderedHtml'], 'The renderedHtml should be present' );
 
+		$style = wp_json_encode(
+			[
+				'elements' => [
+					'heading' => [
+						'color' => [
+							'text'       => 'var:preset|color|vivid-cyan-blue',
+							'background' => 'var:preset|color|cyan-bluish-gray',
+						],
+					],
+				],
+			]
+		);
+
 		// Verify the attributes.
 		$this->assertEquals(
 			[
@@ -218,8 +229,13 @@ public function test_retrieve_core_quote_attributes() {
 				'fontFamily'      => 'body',
 				'fontSize'        => 'small',
 				'gradient'        => 'pale-ocean',
-				'lock'            => '{"move":true,"remove":true}',
-				'style'           => '{"elements":{"heading":{"color":{"text":"var:preset|color|vivid-cyan-blue","background":"var:preset|color|cyan-bluish-gray"}}}}', // @todo : use wp_json_encode here.
+				'lock'            => wp_json_encode(
+					[
+						'move'   => true,
+						'remove' => true,
+					]
+				),
+				'style'           => $style,
 				'textColor'       => 'vivid-red',
 				'value'           => '',
 			],