diff --git a/tests/phpunit/tests/blocks/supportedStyles.php b/tests/phpunit/tests/blocks/supportedStyles.php
index bdbf91aa2eb13..222c3cd010dcd 100644
--- a/tests/phpunit/tests/blocks/supportedStyles.php
+++ b/tests/phpunit/tests/blocks/supportedStyles.php
@@ -379,7 +379,7 @@ public function test_custom_font_size() {
 		);
 
 		$expected_classes = 'foo-bar-class wp-block-example';
-		$expected_styles  = 'test: style; font-size: 10px;';
+		$expected_styles  = 'test: style; font-size:10px;';
 
 		$this->assert_content_and_styles_and_classes_match( $block, $expected_classes, $expected_styles );
 	}
@@ -436,7 +436,7 @@ public function test_line_height() {
 		);
 
 		$expected_classes = 'foo-bar-class wp-block-example';
-		$expected_styles  = 'test: style; line-height: 10;';
+		$expected_styles  = 'test: style; line-height:10;';
 
 		$this->assert_content_and_styles_and_classes_match( $block, $expected_classes, $expected_styles );
 	}
@@ -563,7 +563,7 @@ public function test_all_supported() {
 		);
 
 		$expected_classes = 'foo-bar-class wp-block-example has-text-color has-background alignwide';
-		$expected_styles  = 'test: style; color: #000; background-color: #fff; font-size: 10px; line-height: 20;';
+		$expected_styles  = 'test: style; color: #000; background-color: #fff; font-size:10px; line-height:20;';
 
 		$this->assert_content_and_styles_and_classes_match( $block, $expected_classes, $expected_styles );
 	}
@@ -606,7 +606,7 @@ public function test_one_supported() {
 		);
 
 		$expected_classes = 'foo-bar-class wp-block-example';
-		$expected_styles  = 'test: style; font-size: 10px;';
+		$expected_styles  = 'test: style; font-size:10px;';
 
 		$this->assert_content_and_styles_and_classes_match( $block, $expected_classes, $expected_styles );
 	}