diff --git a/src/PostRector/Rector/UnusedImportRemovingPostRector.php b/src/PostRector/Rector/UnusedImportRemovingPostRector.php
index 74d6564b0ff..07ec888b10e 100644
--- a/src/PostRector/Rector/UnusedImportRemovingPostRector.php
+++ b/src/PostRector/Rector/UnusedImportRemovingPostRector.php
@@ -159,17 +159,17 @@ private function resolveUsedPhpAndDocNames(Namespace_|FileWithoutNamespace $name
         $docBlockNames = $this->findNamesInDocBlocks($namespace);
 
         $names = [...$phpNames, ...$docBlockNames];
-        return array_unique(array_map(strtolower(...), $names));
+        return array_unique($names);
     }
 
     /**
-     * @param string[] $names
+     * @param string[]  $names
      */
     private function isUseImportUsed(UseUse $useUse, array $names, ?Name $namespaceName): bool
     {
-        $comparedName = strtolower($useUse->alias instanceof Identifier
+        $comparedName = $useUse->alias instanceof Identifier
             ? $useUse->alias->toString()
-            : $useUse->name->toString());
+            : $useUse->name->toString();
 
         if (in_array($comparedName, $names, true)) {
             return true;
@@ -181,8 +181,8 @@ private function isUseImportUsed(UseUse $useUse, array $names, ?Name $namespaceN
             $namespacedPrefix = $comparedName . '\\';
         }
 
-        $lastName = strtolower($useUse->name->getLast());
-        $namespaceName = $namespaceName instanceof Name ? strtolower($namespaceName->toString()) : null;
+        $lastName = $useUse->name->getLast();
+        $namespaceName = $namespaceName instanceof Name ? $namespaceName->toString() : null;
 
         // match partial import
         foreach ($names as $name) {
diff --git a/tests/Issues/NamespacedUse/Fixture/skip_conflict_last_name_insensitive.php.inc b/tests/Issues/NamespacedUse/Fixture/skip_conflict_last_name_insensitive.php.inc
deleted file mode 100644
index 0d494ef03e9..00000000000
--- a/tests/Issues/NamespacedUse/Fixture/skip_conflict_last_name_insensitive.php.inc
+++ /dev/null
@@ -1,17 +0,0 @@
-<?php
-
-namespace Rector\Tests\Issues\NamespacedUseAutoImport\Fixture;
-
-use Some\CLASS_;
-use PhpParser\node;
-
-final class SkipConflictLastNameUsed
-{
-    /**
-     * @param Node\STMT\Class_ $param
-     */
-    public function run($param): void
-    {
-        new Class_();
-    }
-}
diff --git a/tests/Issues/NamespacedUse/Fixture/skip_different_letter_case.php.inc b/tests/Issues/NamespacedUse/Fixture/skip_different_letter_case.php.inc
deleted file mode 100644
index 9f288481a03..00000000000
--- a/tests/Issues/NamespacedUse/Fixture/skip_different_letter_case.php.inc
+++ /dev/null
@@ -1,11 +0,0 @@
-<?php
-
-namespace Rector\Tests\Issues\NamespacedUseAutoImport\Fixture;
-
-use App\Bar\JsoN;
-
-final class Json{}
-
-echo JSON::class;
-
-?>