diff --git a/.github/workflows/compat_tests.yaml.yml b/.github/workflows/compat_tests.yaml.yml
index e5f9131..931d5ce 100644
--- a/.github/workflows/compat_tests.yaml.yml
+++ b/.github/workflows/compat_tests.yaml.yml
@@ -55,6 +55,8 @@ jobs:
 
             -   run: vendor/bin/phpunit tests/PHPStan
 
+            -   run: vendor/bin/phpunit tests/PHPStan --config phpunit_custom_bootstrap.xml
+
             -   run: vendor/bin/phpunit tests/Rector
 
             -   run: vendor/bin/phpunit
diff --git a/phpunit_custom_bootstrap.xml b/phpunit_custom_bootstrap.xml
new file mode 100644
index 0000000..bb3c78e
--- /dev/null
+++ b/phpunit_custom_bootstrap.xml
@@ -0,0 +1,14 @@
+<?xml version="1.0" encoding="UTF-8"?>
+
+<phpunit
+    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xsi:noNamespaceSchemaLocation="vendor/phpunit/phpunit/phpunit.xsd"
+    colors="true"
+    bootstrap="tests/PHPStan/CustomPHPStanRule/autoload/bootstrap.php"
+>
+    <testsuites>
+        <testsuite name="Project Tests">
+            <directory>tests</directory>
+        </testsuite>
+    </testsuites>
+</phpunit>
diff --git a/tests/PHPStan/CustomPHPStanRule/autoload/bootstrap.php b/tests/PHPStan/CustomPHPStanRule/autoload/bootstrap.php
new file mode 100644
index 0000000..7636b36
--- /dev/null
+++ b/tests/PHPStan/CustomPHPStanRule/autoload/bootstrap.php
@@ -0,0 +1,4 @@
+<?php
+
+include __DIR__ . '/../../../../vendor/rector/rector/preload.php';
+include __DIR__ . '/../../../../vendor/autoload.php';