More test fixes.

.ddev/config.yaml

@@ -1,7 +1,7 @@
 name: drush
 type: php
 docroot: sut
-php_version: "7.4"
+php_version: "8.1"
 webserver_type: nginx-fpm
 router_http_port: "87"
 router_https_port: "444"

composer.json

@@ -57,7 +57,7 @@
     "composer/installers": "^1.7",
     "cweagans/composer-patches": "~1.0",
     "david-garcia/phpwhois": "4.3.0",
-    "drupal/core-recommended": "^9 || ^10",
+    "drupal/core-recommended": "10.0.x-dev",
     "drupal/semver_example": "2.3.0",
     "phpunit/phpunit": ">=7.5.20",
     "rector/rector": "^0.12",
@@ -95,7 +95,7 @@
     "sort-packages": true,
     "process-timeout": 9600,
     "platform": {
-      "php": "7.4"
+
     }
   },
   "scripts": {