diff --git a/src/Psalm/Config.php b/src/Psalm/Config.php
index d9d81bfd5fb..9ac69ea7d42 100644
--- a/src/Psalm/Config.php
+++ b/src/Psalm/Config.php
@@ -6,7 +6,7 @@
 use Composer\Semver\Constraint\Constraint;
 use Composer\Semver\VersionParser;
 use DOMDocument;
-use DomElement;
+use DOMElement;
 use InvalidArgumentException;
 use LogicException;
 use OutOfBoundsException;
@@ -752,7 +752,6 @@ 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 (!$psalm_node) {
diff --git a/src/Psalm/Internal/Analyzer/ClassLikeAnalyzer.php b/src/Psalm/Internal/Analyzer/ClassLikeAnalyzer.php
index 0b4934e8de0..51387fc2cdf 100644
--- a/src/Psalm/Internal/Analyzer/ClassLikeAnalyzer.php
+++ b/src/Psalm/Internal/Analyzer/ClassLikeAnalyzer.php
@@ -361,16 +361,14 @@ public static function checkFullyQualifiedClassLikeName(
                 || ($interface_exists && !$codebase->interfaceHasCorrectCasing($fq_class_name))
                 || ($enum_exists && !$codebase->classlikes->enumHasCorrectCasing($fq_class_name))
             ) {
-                if ($codebase->classlikes->isUserDefined(strtolower($aliased_name))) {
-                    IssueBuffer::maybeAdd(
-                        new InvalidClass(
-                            'Class, interface or enum ' . $fq_class_name . ' has wrong casing',
-                            $code_location,
-                            $fq_class_name
-                        ),
-                        $suppressed_issues
-                    );
-                }
+                IssueBuffer::maybeAdd(
+                    new InvalidClass(
+                        'Class, interface or enum ' . $fq_class_name . ' has wrong casing',
+                        $code_location,
+                        $fq_class_name
+                    ),
+                    $suppressed_issues
+                );
             }
         }
 
diff --git a/src/Psalm/Internal/Codebase/ClassLikes.php b/src/Psalm/Internal/Codebase/ClassLikes.php
index 372d1da901f..d19b202fef6 100644
--- a/src/Psalm/Internal/Codebase/ClassLikes.php
+++ b/src/Psalm/Internal/Codebase/ClassLikes.php
@@ -784,14 +784,6 @@ public function traitHasCorrectCase(string $fq_trait_name): bool
         return isset($this->existing_traits[$fq_trait_name]);
     }
 
-    /**
-     * @param  lowercase-string  $fq_class_name
-     */
-    public function isUserDefined(string $fq_class_name): bool
-    {
-        return $this->classlike_storage_provider->get($fq_class_name)->user_defined;
-    }
-
     public function getTraitNode(string $fq_trait_name): PhpParser\Node\Stmt\Trait_
     {
         $fq_trait_name_lc = strtolower($fq_trait_name);
diff --git a/src/Psalm/Internal/PluginManager/ConfigFile.php b/src/Psalm/Internal/PluginManager/ConfigFile.php
index a945dd24931..ccabdc12b39 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;
 
@@ -51,7 +51,7 @@ 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) {
@@ -59,7 +59,7 @@ public function removePlugin(string $plugin_class): void
             return;
         }
 
-        /** @var DomElement */
+        /** @var DOMElement */
         $plugins_element = $plugins_elements->item(0);
 
         $plugin_elements = $plugins_element->getElementsByTagName('pluginClass');
@@ -82,7 +82,7 @@ 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) {
@@ -91,7 +91,7 @@ public function addPlugin(string $plugin_class): void
                 $psalm_root->appendChild($plugins_element);
             }
         } else {
-            /** @var DomElement */
+            /** @var DOMElement */
             $plugins_element = $plugins_elements->item(0);
         }
 
diff --git a/tests/IntRangeTest.php b/tests/IntRangeTest.php
index 5aa37992772..7d3491b73f8 100644
--- a/tests/IntRangeTest.php
+++ b/tests/IntRangeTest.php
@@ -687,7 +687,7 @@ function doAnalysis(): void
                     /** @var string $secret */
                     $length = strlen($secret);
                     if ($length > 16) {
-                        throw new exception("");
+                        throw new Exception("");
                     }
 
                     assert($length === 1);
diff --git a/tests/MethodCallTest.php b/tests/MethodCallTest.php
index 62860e8f209..f30f1115fdc 100644
--- a/tests/MethodCallTest.php
+++ b/tests/MethodCallTest.php
@@ -979,7 +979,7 @@ public static function new() : self {
 
                     class Datetime extends \DateTime
                     {
-                        public static function createFromInterface(\DatetimeInterface $datetime): \DateTime
+                        public static function createFromInterface(\DateTimeInterface $datetime): \DateTime
                         {
                             return parent::createFromInterface($datetime);
                         }