diff --git a/composer.json b/composer.json
index d3a7e67..1e98765 100644
--- a/composer.json
+++ b/composer.json
@@ -22,7 +22,8 @@
     "require-dev": {
         "phpunit/phpunit": "^8 || ^9",
         "phpstan/phpstan": "^1.12 || ^2",
-        "phpstan/phpstan-strict-rules": "^1 || ^2"
+        "phpstan/phpstan-strict-rules": "^1 || ^2",
+        "phpstan/phpstan-deprecation-rules": "^1 || ^2"
     },
     "conflict": {
         "phpstan/phpstan": "<1.11.10"
diff --git a/phpstan.neon.dist b/phpstan.neon.dist
index e8ae6e5..2a983c6 100644
--- a/phpstan.neon.dist
+++ b/phpstan.neon.dist
@@ -17,4 +17,5 @@ includes:
     - extension.neon
     - vendor/phpstan/phpstan/conf/bleedingEdge.neon
     - vendor/phpstan/phpstan-strict-rules/rules.neon
+    - vendor/phpstan/phpstan-deprecation-rules/rules.neon
     - phpstan-baseline.neon
diff --git a/tests/BaseTestCase.php b/tests/BaseTestCase.php
index 827f646..928caed 100644
--- a/tests/BaseTestCase.php
+++ b/tests/BaseTestCase.php
@@ -31,8 +31,8 @@ protected function doExpectException(string $class, ?string $message = null): vo
 
     protected function doExpectWarning(string $message): void
     {
-        $this->expectWarning();
-        $this->expectWarningMessage($message);
+        $this->expectWarning(); // @phpstan-ignore method.deprecated
+        $this->expectWarningMessage($message); // @phpstan-ignore method.deprecated
     }
 
     protected function expectPcreEngineException(string $pattern): void