diff --git a/tests/KintTestCase.php b/tests/KintTestCase.php
index bf835d4ea..12e2f3bea 100644
--- a/tests/KintTestCase.php
+++ b/tests/KintTestCase.php
@@ -31,6 +31,7 @@
 use Kint\Parser\ArrayLimitPlugin;
 use Kint\Parser\BlacklistPlugin;
 use Kint\Parser\ClassHooksPlugin;
+use Kint\Parser\ClassStringsPlugin;
 use Kint\Parser\DomPlugin;
 use Kint\Parser\FsPathPlugin;
 use Kint\Parser\SerializePlugin;
@@ -69,6 +70,7 @@ class KintTestCase extends TestCase
     protected $dom_plugin_blacklist;
     protected $dom_plugin_verbose;
     protected $classhooks_verbose;
+    protected $classstrings_blacklist;
 
     protected function setUp(): void
     {
@@ -99,6 +101,7 @@ protected function setUp(): void
         $this->dom_plugin_blacklist = DomPlugin::$blacklist;
         $this->dom_plugin_verbose = DomPlugin::$verbose;
         $this->classhooks_verbose = ClassHooksPlugin::$verbose;
+        $this->classstrings_blacklist = ClassStringsPlugin::$blacklist;
     }
 
     protected function tearDown(): void
@@ -132,6 +135,7 @@ protected function tearDown(): void
         DomPlugin::$blacklist = $this->dom_plugin_blacklist;
         DomPlugin::$verbose = $this->dom_plugin_verbose;
         ClassHooksPlugin::$verbose = $this->classhooks_verbose;
+        ClassStringsPlugin::$blacklist = $this->classstrings_blacklist;
     }
 
     public function assertLike(array $expected, string $actual, string $message = '')