diff --git a/src/wp-admin/includes/image.php b/src/wp-admin/includes/image.php
index e64c49c4d1..56b9c0a36f 100644
--- a/src/wp-admin/includes/image.php
+++ b/src/wp-admin/includes/image.php
@@ -721,7 +721,7 @@ function wp_read_image_metadata( $file ) {
 		if ( ! empty( $info['APP13'] ) ) {
 			if (
 				// Skip when running unit tests.
-				! defined( 'DIR_TESTDATA' )
+				! defined( 'WP_RUN_CORE_TESTS' )
 				&&
 				// Process without silencing errors when in debug mode.
 				defined( 'WP_DEBUG' ) && WP_DEBUG
@@ -792,7 +792,7 @@ function wp_read_image_metadata( $file ) {
 	if ( is_callable( 'exif_read_data' ) && in_array( $image_type, $exif_image_types, true ) ) {
 		if (
 			// Skip when running unit tests.
-			! defined( 'DIR_TESTDATA' )
+			! defined( 'WP_RUN_CORE_TESTS' )
 			&&
 			// Process without silencing errors when in debug mode.
 			defined( 'WP_DEBUG' ) && WP_DEBUG
diff --git a/src/wp-includes/media.php b/src/wp-includes/media.php
index b22e04f3e3..11b6fae7d1 100644
--- a/src/wp-includes/media.php
+++ b/src/wp-includes/media.php
@@ -4975,7 +4975,7 @@ function wp_show_heic_upload_error( $plupload_settings ) {
 function wp_getimagesize( $filename, &$imageinfo = array() ) {
 	if (
 		// Skip when running unit tests.
-		! defined( 'DIR_TESTDATA' )
+		! defined( 'WP_RUN_CORE_TESTS' )
 		&&
 		// Return without silencing errors when in debug mode.
 		defined( 'WP_DEBUG' ) && WP_DEBUG