diff --git a/src/Framework/MockObject/Api/MockedCloneMethodWithVoidReturnType.php b/src/Framework/MockObject/Api/MockedCloneMethodWithVoidReturnType.php
deleted file mode 100644
index adbf82f3949..00000000000
--- a/src/Framework/MockObject/Api/MockedCloneMethodWithVoidReturnType.php
+++ /dev/null
@@ -1,21 +0,0 @@
-<?php declare(strict_types=1);
-/*
- * This file is part of PHPUnit.
- *
- * (c) Sebastian Bergmann <sebastian@phpunit.de>
- *
- * For the full copyright and license information, please view the LICENSE
- * file that was distributed with this source code.
- */
-namespace PHPUnit\Framework\MockObject;
-
-/**
- * @internal This trait is not covered by the backward compatibility promise for PHPUnit
- */
-trait MockedCloneMethodWithVoidReturnType
-{
-    public function __clone(): void
-    {
-        $this->__phpunit_invocationMocker = clone $this->__phpunit_getInvocationHandler();
-    }
-}
diff --git a/src/Framework/MockObject/Api/MockedCloneMethodWithoutReturnType.php b/src/Framework/MockObject/Api/MockedCloneMethodWithoutReturnType.php
deleted file mode 100644
index 598d5006c6b..00000000000
--- a/src/Framework/MockObject/Api/MockedCloneMethodWithoutReturnType.php
+++ /dev/null
@@ -1,21 +0,0 @@
-<?php declare(strict_types=1);
-/*
- * This file is part of PHPUnit.
- *
- * (c) Sebastian Bergmann <sebastian@phpunit.de>
- *
- * For the full copyright and license information, please view the LICENSE
- * file that was distributed with this source code.
- */
-namespace PHPUnit\Framework\MockObject;
-
-/**
- * @internal This trait is not covered by the backward compatibility promise for PHPUnit
- */
-trait MockedCloneMethodWithoutReturnType
-{
-    public function __clone()
-    {
-        $this->__phpunit_invocationMocker = clone $this->__phpunit_getInvocationHandler();
-    }
-}
diff --git a/src/Framework/MockObject/Api/UnmockedCloneMethodWithVoidReturnType.php b/src/Framework/MockObject/Api/UnmockedCloneMethodWithVoidReturnType.php
deleted file mode 100644
index af90e4fe9e9..00000000000
--- a/src/Framework/MockObject/Api/UnmockedCloneMethodWithVoidReturnType.php
+++ /dev/null
@@ -1,23 +0,0 @@
-<?php declare(strict_types=1);
-/*
- * This file is part of PHPUnit.
- *
- * (c) Sebastian Bergmann <sebastian@phpunit.de>
- *
- * For the full copyright and license information, please view the LICENSE
- * file that was distributed with this source code.
- */
-namespace PHPUnit\Framework\MockObject;
-
-/**
- * @internal This trait is not covered by the backward compatibility promise for PHPUnit
- */
-trait UnmockedCloneMethodWithVoidReturnType
-{
-    public function __clone(): void
-    {
-        $this->__phpunit_invocationMocker = clone $this->__phpunit_getInvocationHandler();
-
-        parent::__clone();
-    }
-}
diff --git a/src/Framework/MockObject/Api/UnmockedCloneMethodWithoutReturnType.php b/src/Framework/MockObject/Api/UnmockedCloneMethodWithoutReturnType.php
deleted file mode 100644
index c9980c62f04..00000000000
--- a/src/Framework/MockObject/Api/UnmockedCloneMethodWithoutReturnType.php
+++ /dev/null
@@ -1,23 +0,0 @@
-<?php declare(strict_types=1);
-/*
- * This file is part of PHPUnit.
- *
- * (c) Sebastian Bergmann <sebastian@phpunit.de>
- *
- * For the full copyright and license information, please view the LICENSE
- * file that was distributed with this source code.
- */
-namespace PHPUnit\Framework\MockObject;
-
-/**
- * @internal This trait is not covered by the backward compatibility promise for PHPUnit
- */
-trait UnmockedCloneMethodWithoutReturnType
-{
-    public function __clone()
-    {
-        $this->__phpunit_invocationMocker = clone $this->__phpunit_getInvocationHandler();
-
-        parent::__clone();
-    }
-}
diff --git a/src/Framework/MockObject/Generator.php b/src/Framework/MockObject/Generator.php
index 1ae58cf640b..0d1417de6ff 100644
--- a/src/Framework/MockObject/Generator.php
+++ b/src/Framework/MockObject/Generator.php
@@ -63,6 +63,58 @@
  */
 final class Generator
 {
+    private const MOCKED_CLONE_METHOD_WITH_VOID_RETURN_TYPE_TRAIT = <<<'EOT'
+namespace PHPUnit\Framework\MockObject;
+
+trait MockedCloneMethodWithVoidReturnType
+{
+    public function __clone(): void
+    {
+        $this->__phpunit_invocationMocker = clone $this->__phpunit_getInvocationHandler();
+    }
+}
+EOT;
+
+    private const MOCKED_CLONE_METHOD_WITHOUT_RETURN_TYPE_TRAIT = <<<'EOT'
+namespace PHPUnit\Framework\MockObject;
+
+trait MockedCloneMethodWithoutReturnType
+{
+    public function __clone()
+    {
+        $this->__phpunit_invocationMocker = clone $this->__phpunit_getInvocationHandler();
+    }
+}
+EOT;
+
+    private const UNMOCKED_CLONE_METHOD_WITH_VOID_RETURN_TYPE_TRAIT = <<<'EOT'
+namespace PHPUnit\Framework\MockObject;
+
+trait UnmockedCloneMethodWithVoidReturnType
+{
+    public function __clone(): void
+    {
+        $this->__phpunit_invocationMocker = clone $this->__phpunit_getInvocationHandler();
+
+        parent::__clone();
+    }
+}
+EOT;
+
+    private const UNMOCKED_CLONE_METHOD_WITHOUT_RETURN_TYPE_TRAIT = <<<'EOT'
+namespace PHPUnit\Framework\MockObject;
+
+trait UnmockedCloneMethodWithoutReturnType
+{
+    public function __clone()
+    {
+        $this->__phpunit_invocationMocker = clone $this->__phpunit_getInvocationHandler();
+
+        parent::__clone();
+    }
+}
+EOT;
+
     /**
      * @var array
      */
@@ -954,19 +1006,11 @@ private function generateMock($type, ?array $explicitMethods, string $mockClassN
         $cloneTrait = '';
 
         if ($mockedCloneMethod) {
-            if (PHP_MAJOR_VERSION >= 8) {
-                $cloneTrait = PHP_EOL . '    use \PHPUnit\Framework\MockObject\MockedCloneMethodWithVoidReturnType;';
-            } else {
-                $cloneTrait = PHP_EOL . '    use \PHPUnit\Framework\MockObject\MockedCloneMethodWithoutReturnType;';
-            }
+            $cloneTrait = $this->mockedCloneMethod();
         }
 
         if ($unmockedCloneMethod) {
-            if (PHP_MAJOR_VERSION >= 8) {
-                $cloneTrait = PHP_EOL . '    use \PHPUnit\Framework\MockObject\UnmockedCloneMethodWithVoidReturnType;';
-            } else {
-                $cloneTrait = PHP_EOL . '    use \PHPUnit\Framework\MockObject\UnmockedCloneMethodWithoutReturnType;';
-            }
+            $cloneTrait = $this->unmockedCloneMethod();
         }
 
         $classTemplate->setVar(
@@ -1107,4 +1151,38 @@ private function isConstructor(ReflectionMethod $method): bool
 
         return $methodName === $className;
     }
+
+    private function mockedCloneMethod(): string
+    {
+        if (PHP_MAJOR_VERSION >= 8) {
+            if (!trait_exists('\PHPUnit\Framework\MockObject\MockedCloneMethodWithVoidReturnType')) {
+                eval(self::MOCKED_CLONE_METHOD_WITH_VOID_RETURN_TYPE_TRAIT);
+            }
+
+            return PHP_EOL . '    use \PHPUnit\Framework\MockObject\MockedCloneMethodWithVoidReturnType;';
+        }
+
+        if (!trait_exists('\PHPUnit\Framework\MockObject\MockedCloneMethodWithoutReturnType')) {
+            eval(self::MOCKED_CLONE_METHOD_WITHOUT_RETURN_TYPE_TRAIT);
+        }
+
+        return PHP_EOL . '    use \PHPUnit\Framework\MockObject\MockedCloneMethodWithoutReturnType;';
+    }
+
+    private function unmockedCloneMethod(): string
+    {
+        if (PHP_MAJOR_VERSION >= 8) {
+            if (!trait_exists('\PHPUnit\Framework\MockObject\UnmockedCloneMethodWithVoidReturnType')) {
+                eval(self::UNMOCKED_CLONE_METHOD_WITH_VOID_RETURN_TYPE_TRAIT);
+            }
+
+            return PHP_EOL . '    use \PHPUnit\Framework\MockObject\UnmockedCloneMethodWithVoidReturnType;';
+        }
+
+        if (!trait_exists('\PHPUnit\Framework\MockObject\UnmockedCloneMethodWithoutReturnType')) {
+            eval(self::UNMOCKED_CLONE_METHOD_WITHOUT_RETURN_TYPE_TRAIT);
+        }
+
+        return PHP_EOL . '    use \PHPUnit\Framework\MockObject\UnmockedCloneMethodWithoutReturnType;';
+    }
 }