diff --git a/tests/phpunit/tests/rest-api/rest-attachments-controller.php b/tests/phpunit/tests/rest-api/rest-attachments-controller.php
index 5fd0b46c6f..b4115d41e7 100644
--- a/tests/phpunit/tests/rest-api/rest-attachments-controller.php
+++ b/tests/phpunit/tests/rest-api/rest-attachments-controller.php
@@ -583,6 +583,9 @@ class WP_Test_REST_Attachments_Controller extends WP_Test_REST_Post_Type_Control
 		$this->assertSame( 'image/jpeg', $data['mime_type'] );
 	}
 
+	/**
+	 * @requires function imagejpeg
+	 */
 	public function test_get_item_sizes() {
 		$attachment_id = $this->factory->attachment->create_object(
 			$this->test_file,
@@ -611,6 +614,9 @@ class WP_Test_REST_Attachments_Controller extends WP_Test_REST_Post_Type_Control
 		$this->assertSame( 'image/jpeg', $data['media_details']['sizes']['full']['mime_type'] );
 	}
 
+	/**
+	 * @requires function imagejpeg
+	 */
 	public function test_get_item_sizes_with_no_url() {
 		$attachment_id = $this->factory->attachment->create_object(
 			$this->test_file,
@@ -1944,6 +1950,7 @@ class WP_Test_REST_Attachments_Controller extends WP_Test_REST_Post_Type_Control
 
 	/**
 	 * @ticket 44405
+	 * @requires function imagejpeg
 	 */
 	public function test_edit_image() {
 		wp_set_current_user( self::$superadmin_id );