diff --git a/tests/bootstrap.php b/tests/bootstrap.php
index c347ebe..3a096b6 100644
--- a/tests/bootstrap.php
+++ b/tests/bootstrap.php
@@ -14,4 +14,15 @@
 Environment::setup();
 Environment::bypassFinals();
 
+# disable E_DEPRECATED errors from the vendor code (some nette packages before v3.1 are not fully compatible with PHP 8.1/8.2)
+$previousHandler = set_error_handler(static function (int $errNo, string $errStr, string $errFile, int $errLine) use (&$previousHandler): bool {
+    $vendor = realpath(__DIR__ . '/../vendor');
+
+    if (E_DEPRECATED === $errNo && 0 === strncmp($errFile, $vendor, strlen($vendor))) {
+        return true;
+    }
+
+    return $previousHandler($errNo, $errStr, $errFile, $errLine);
+});
+
 return $loader;