diff --git a/.github/workflows/tests.yaml b/.github/workflows/tests.yaml
index 58f2834a1f3..e7d050f9d3d 100644
--- a/.github/workflows/tests.yaml
+++ b/.github/workflows/tests.yaml
@@ -36,4 +36,12 @@ jobs:
 
             -   uses: "ramsey/composer-install@v4"
 
+            # load PHPStan Turbo from php.ini, so every PHP process of the test suite has it
+            -
+                name: Load PHPStan Turbo
+                run: |
+                    EXTENSION=$(php -r 'require "vendor/autoload.php"; echo PHPStan\Turbo\TurboExtensionSelector::findExtensionForWorkers();')
+                    echo "extension=$EXTENSION" | sudo tee "$(php -r 'echo PHP_CONFIG_FILE_SCAN_DIR;')/99-phpstan-turbo.ini"
+                    php -r 'exit(extension_loaded("phpstan_turbo") ? 0 : 1);'
+
             -   run: vendor/bin/fastunit tests rules-tests utils/phpstan/tests
diff --git a/tests/bootstrap.php b/tests/bootstrap.php
index 800fd015f78..cb7bd710f93 100644
--- a/tests/bootstrap.php
+++ b/tests/bootstrap.php
@@ -2,6 +2,17 @@
 
 declare(strict_types=1);
 
+use PHPStan\PharAutoloader;
+use PHPStan\Turbo\TurboExtensionEnabler;
+
+// PHPStan Turbo replaces php-parser classes, so it is activated before preload.php declares them
+if (extension_loaded('phpstan_turbo')) {
+    require_once __DIR__ . '/../vendor/autoload.php';
+    TurboExtensionEnabler::activateIfCompatible(
+        dirname((string) new ReflectionClass(PharAutoloader::class)->getFileName()) . '/phpstan.phar'
+    );
+}
+
 // make local php-parser a priority to avoid conflict
 require_once __DIR__ . '/../preload.php';
 require_once __DIR__ . '/../vendor/autoload.php';