diff --git a/core/modules/system/src/Plugin/ImageToolkit/Operation/gd/Rotate.php b/core/modules/system/src/Plugin/ImageToolkit/Operation/gd/Rotate.php
index fb00db3..c77ff31 100644
--- a/core/modules/system/src/Plugin/ImageToolkit/Operation/gd/Rotate.php
+++ b/core/modules/system/src/Plugin/ImageToolkit/Operation/gd/Rotate.php
@@ -105,9 +105,9 @@ protected function execute(array $arguments) {
       $this->getToolkit()->setResource($new_res);
       imagedestroy($original_res);
 
-      // GIFs need to reassign the transparent color after performing the rotate,
-      // but only do so, if the image already had transparency of its own, or the
-      // rotate added a transparent background.
+      // GIFs need to reassign the transparent color after performing the
+      // rotate, but only do so, if the image already had transparency of its
+      // own, or the rotate added a transparent background.
       if (!empty($arguments['gif_transparent_color'])) {
         $transparent_idx = imagecolorexactalpha($this->getToolkit()->getResource(), $arguments['gif_transparent_color']['red'], $arguments['gif_transparent_color']['green'], $arguments['gif_transparent_color']['blue'], $arguments['gif_transparent_color']['alpha']);
         imagecolortransparent($this->getToolkit()->getResource(), $transparent_idx);
diff --git a/core/modules/system/src/Tests/Image/ToolkitGdTest.php b/core/modules/system/src/Tests/Image/ToolkitGdTest.php
index faaaeb6..4e622a8 100644
--- a/core/modules/system/src/Tests/Image/ToolkitGdTest.php
+++ b/core/modules/system/src/Tests/Image/ToolkitGdTest.php
@@ -399,25 +399,28 @@ function testManipulations() {
       }
     }
 
-    // Test that CreateNew does not leave orphaned GD resources.
+    // Test that 'create_new' operation does not leave orphaned GD resources.
     $image = $this->imageFactory->get(drupal_get_path('module', 'simpletest') . '/files/image-test.png');
     $old_res = $image->getToolkit()->getResource();
-    $this->assertTrue(is_resource($old_res), 'Successfully loaded an existing image.');
+    // Check if resource has been created successfully.
+    $this->assertTrue(is_resource($old_res));
     $image->createNew(20, 20);
     $new_res = $image->getToolkit()->getResource();
-    $this->assertFalse(is_resource($old_res), 'CreateNew destroyed the original resource.');
-    $this->assertTrue(is_resource($new_res), 'CreateNew has created a new resource.');
+    // Check if the original resource has been destroyed.
+    $this->assertFalse(is_resource($old_res));
+    // Check if a new resource has been created successfully.
+    $this->assertTrue(is_resource($new_res));
 
-    // Test failures of CreateNew.
+    // Test failures of the 'create_new' operation.
     $image = $this->imageFactory->get();
     $image->createNew(-50, 20);
-    $this->assertFalse($image->isValid(), 'CreateNew with negative width fails.');
+    $this->assertFalse($image->isValid(), 'create_new with negative width fails.');
     $image->createNew(50, 20, 'foo');
-    $this->assertFalse($image->isValid(), 'CreateNew with invalid extension fails.');
+    $this->assertFalse($image->isValid(), 'create_new with invalid extension fails.');
     $image->createNew(50, 20, 'gif', '#foo');
-    $this->assertFalse($image->isValid(), 'CreateNew with invalid color hex string fails.');
+    $this->assertFalse($image->isValid(), 'create_new with invalid color hex string fails.');
     $image->createNew(50, 20, 'gif', '#ff0000');
-    $this->assertTrue($image->isValid(), 'CreateNew with valid arguments validates the Image.');
+    $this->assertTrue($image->isValid(), 'create_new with valid arguments validates the Image.');
   }
 
   /**