diff --git a/tests/TwoFactorAuthTest.php b/tests/TwoFactorAuthTest.php
index 89f1ac0..a133dd1 100644
--- a/tests/TwoFactorAuthTest.php
+++ b/tests/TwoFactorAuthTest.php
@@ -8,6 +8,7 @@ require_once 'lib/Providers/Qr/GoogleQRCodeProvider.php';
 
 require_once 'lib/Providers/Rng/IRNGProvider.php';
 require_once 'lib/Providers/Rng/RNGException.php';
+require_once 'lib/Providers/Rng/CSRNGProvider.php';
 require_once 'lib/Providers/Rng/MCryptRNGProvider.php';
 require_once 'lib/Providers/Rng/OpenSSLRNGProvider.php';
 require_once 'lib/Providers/Rng/HashRNGProvider.php';