diff --git a/tests/phpunit/tests/image/functions.php b/tests/phpunit/tests/image/functions.php
index f55b164496a84..85c00734edcc3 100644
--- a/tests/phpunit/tests/image/functions.php
+++ b/tests/phpunit/tests/image/functions.php
@@ -111,6 +111,10 @@ public function data_file_is_valid_image_positive() {
 			'webp-lossless.webp',
 			'webp-lossy.webp',
 			'webp-transparent.webp',
+			'avif-animated.avif',
+			'avif-lossless.avif',
+			'avif-lossy.avif',
+			'avif-transparent.avif',
 		);
 
 		return $this->text_array_to_dataprovider( $files );