diff --git a/composer.json b/composer.json
index 528c638..3bfcaf3 100644
--- a/composer.json
+++ b/composer.json
@@ -15,7 +15,7 @@
     },
     "require-dev": {
         "wp-cli/entity-command": "^1.3 || ^2",
-        "wp-cli/wp-cli-tests": "^3.1"
+        "wp-cli/wp-cli-tests": "^4"
     },
     "config": {
         "process-timeout": 7200,
diff --git a/src/Fetch_Command.php b/src/Fetch_Command.php
index 9b254c9..b00563c 100644
--- a/src/Fetch_Command.php
+++ b/src/Fetch_Command.php
@@ -127,7 +127,7 @@ function ( $args ) use ( $response_size_limit ) {
 			remove_all_filters( 'oembed_dataparse' ); // Save a few cycles.
 			add_filter(
 				'oembed_dataparse',
-				function ( $return, $data, $url ) {
+				function ( $ret, $data, $url ) {
 					return $data;
 				},
 				PHP_INT_MAX,