diff --git a/ChangeLog-11.0.md b/ChangeLog-11.0.md
index b7d19e7cee3..20277bfc10c 100644
--- a/ChangeLog-11.0.md
+++ b/ChangeLog-11.0.md
@@ -11,6 +11,7 @@ All notable changes of the PHPUnit 11.0 release series are documented in this fi
 
 ### Deprecated
 
+* [#5240](https://github.com/sebastianbergmann/phpunit/issues/5240): `TestCase::createTestProxy()` (this method was already [soft-deprecated](https://phpunit.de/backward-compatibility.html#soft-deprecation) in PHPUnit 10)
 * [#5241](https://github.com/sebastianbergmann/phpunit/issues/5241): `TestCase::getMockForAbstractClass()` (this method was already [soft-deprecated](https://phpunit.de/backward-compatibility.html#soft-deprecation) in PHPUnit 10)
 * [#5242](https://github.com/sebastianbergmann/phpunit/issues/5242): `TestCase::getMockFromWsdl()` (this method was already [soft-deprecated](https://phpunit.de/backward-compatibility.html#soft-deprecation) in PHPUnit 10)
 * [#5243](https://github.com/sebastianbergmann/phpunit/issues/5243): `TestCase::getMockForTrait()` (this method was already [soft-deprecated](https://phpunit.de/backward-compatibility.html#soft-deprecation) in PHPUnit 10)
diff --git a/DEPRECATIONS.md b/DEPRECATIONS.md
index 499a896777e..7d069da45f2 100644
--- a/DEPRECATIONS.md
+++ b/DEPRECATIONS.md
@@ -10,7 +10,6 @@ This functionality is currently [soft-deprecated](https://phpunit.de/backward-co
 
 | Issue                                                             | Description                                       | Since  | Replacement                                                                             |
 |-------------------------------------------------------------------|---------------------------------------------------|--------|-----------------------------------------------------------------------------------------|
-| [#5240](https://github.com/sebastianbergmann/phpunit/issues/5240) | `TestCase::createTestProxy()`                     | 10.1.0 |                                                                                         |
 | [#5305](https://github.com/sebastianbergmann/phpunit/issues/5305) | `MockBuilder::getMockForAbstractClass()`          | 10.1.0 |                                                                                         |
 | [#5306](https://github.com/sebastianbergmann/phpunit/issues/5306) | `MockBuilder::getMockForTrait()`                  | 10.1.0 |                                                                                         |
 | [#5307](https://github.com/sebastianbergmann/phpunit/issues/5307) | `MockBuilder::disableProxyingToOriginalMethods()` | 10.1.0 |                                                                                         |
@@ -83,6 +82,7 @@ This functionality is currently [hard-deprecated](https://phpunit.de/backward-co
 
 | Issue                                                             | Description                           | Since  | Replacement |
 |-------------------------------------------------------------------|---------------------------------------|--------|-------------|
+| [#5240](https://github.com/sebastianbergmann/phpunit/issues/5240) | `TestCase::createTestProxy()`         | 10.1.0 |             |
 | [#5241](https://github.com/sebastianbergmann/phpunit/issues/5241) | `TestCase::getMockForAbstractClass()` | 10.1.0 |             |
 | [#5242](https://github.com/sebastianbergmann/phpunit/issues/5242) | `TestCase::getMockFromWsdl()`         | 10.1.0 |             |
 | [#5243](https://github.com/sebastianbergmann/phpunit/issues/5243) | `TestCase::getMockForTrait()`         | 10.1.0 |             |
diff --git a/src/Framework/TestCase.php b/src/Framework/TestCase.php
index a07a8dfcef8..6c298e6935c 100644
--- a/src/Framework/TestCase.php
+++ b/src/Framework/TestCase.php
@@ -1312,6 +1312,11 @@ final protected function createPartialMock(string $originalClassName, array $met
      */
     final protected function createTestProxy(string $originalClassName, array $constructorArguments = []): MockObject
     {
+        Event\Facade::emitter()->testTriggeredPhpunitDeprecation(
+            $this->valueObjectForEvents(),
+            'createTestProxy() is deprecated and will be removed in PHPUnit 12. No replacement is/will be provided.',
+        );
+
         $testProxy = $this->getMockBuilder($originalClassName)
             ->setConstructorArgs($constructorArguments)
             ->enableProxyingToOriginalMethods()
diff --git a/tests/unit/Framework/MockObject/Creation/CreateTestProxyTest.php b/tests/unit/Framework/MockObject/Creation/CreateTestProxyTest.php
index fcfc5cbb5eb..9ca8cd00720 100644
--- a/tests/unit/Framework/MockObject/Creation/CreateTestProxyTest.php
+++ b/tests/unit/Framework/MockObject/Creation/CreateTestProxyTest.php
@@ -11,6 +11,7 @@
 
 use function assert;
 use PHPUnit\Framework\Attributes\Group;
+use PHPUnit\Framework\Attributes\IgnorePhpunitDeprecations;
 use PHPUnit\Framework\Attributes\Medium;
 use PHPUnit\Framework\Attributes\TestDox;
 use PHPUnit\Framework\TestCase;
@@ -21,6 +22,7 @@
 #[Group('test-doubles/test-proxy')]
 #[Medium]
 #[TestDox('createTestProxy()')]
+#[IgnorePhpunitDeprecations]
 final class CreateTestProxyTest extends TestCase
 {
     public function testCreatesTestProxyForExtendableClass(): void