diff --git a/bin/composer-require-checker-config.json b/bin/composer-require-checker-config.json
index 268cf8c735d..753f91dd159 100644
--- a/bin/composer-require-checker-config.json
+++ b/bin/composer-require-checker-config.json
@@ -4,7 +4,8 @@
     "static", "self", "parent",
     "array", "string", "int", "float", "bool", "iterable", "callable", "void", "object",
     "igbinary_serialize", "igbinary_unserialize", "PHP_PARSER_VERSION", "PSALM_VERSION", "runkit_object_id",
-    "sapi_windows_cp_is_utf8", "ReflectionUnionType"
+    "sapi_windows_cp_is_utf8", "ReflectionUnionType",
+    "Composer\\Autoload\\ClassLoader"
   ],
   "php-core-extensions" : [
     "Core",
diff --git a/src/Psalm/Config.php b/src/Psalm/Config.php
index 4f8a7e104fb..850303fd530 100644
--- a/src/Psalm/Config.php
+++ b/src/Psalm/Config.php
@@ -7,7 +7,7 @@
 use Composer\Semver\VersionParser;
 use DOMAttr;
 use DOMDocument;
-use DomElement;
+use DOMElement;
 use InvalidArgumentException;
 use JsonException;
 use LogicException;
@@ -764,7 +764,6 @@ private static function validateXmlConfig(string $base_dir, string $file_content
 
         $psalm_nodes = $dom_document->getElementsByTagName('psalm');
 
-        /** @var DomElement|null */
         $psalm_node = $psalm_nodes->item(0);
 
         if (!$psalm_node) {
@@ -853,7 +852,7 @@ private static function processDeprecatedAttribute(
     }
 
     private static function processDeprecatedElement(
-        DomElement $deprecated_element_xml,
+        DOMElement $deprecated_element_xml,
         string $file_contents,
         self $config,
         string $config_path
diff --git a/src/Psalm/Internal/PluginManager/ConfigFile.php b/src/Psalm/Internal/PluginManager/ConfigFile.php
index 82a21354bd4..0fed0fe7987 100644
--- a/src/Psalm/Internal/PluginManager/ConfigFile.php
+++ b/src/Psalm/Internal/PluginManager/ConfigFile.php
@@ -3,7 +3,7 @@
 namespace Psalm\Internal\PluginManager;
 
 use DOMDocument;
-use DomElement;
+use DOMElement;
 use Psalm\Config;
 use RuntimeException;
 
@@ -53,7 +53,7 @@ public function getConfig(): Config
     public function removePlugin(string $plugin_class): void
     {
         $config_xml = $this->readXml();
-        /** @var DomElement */
+        /** @var DOMElement */
         $psalm_root = $config_xml->getElementsByTagName('psalm')[0];
         $plugins_elements = $psalm_root->getElementsByTagName('plugins');
         if (!$plugins_elements->length) {
@@ -61,7 +61,7 @@ public function removePlugin(string $plugin_class): void
             return;
         }
 
-        /** @var DomElement */
+        /** @var DOMElement */
         $plugins_element = $plugins_elements->item(0);
 
         $plugin_elements = $plugins_element->getElementsByTagName('pluginClass');
@@ -84,7 +84,7 @@ public function removePlugin(string $plugin_class): void
     public function addPlugin(string $plugin_class): void
     {
         $config_xml = $this->readXml();
-        /** @var DomElement */
+        /** @var DOMElement */
         $psalm_root = $config_xml->getElementsByTagName('psalm')->item(0);
         $plugins_elements = $psalm_root->getElementsByTagName('plugins');
         if (!$plugins_elements->length) {
@@ -93,7 +93,7 @@ public function addPlugin(string $plugin_class): void
                 $psalm_root->appendChild($plugins_element);
             }
         } else {
-            /** @var DomElement */
+            /** @var DOMElement */
             $plugins_element = $plugins_elements->item(0);
         }