diff --git a/tests/Unit/Crypt/RSA/ModeTest.php b/tests/Unit/Crypt/RSA/ModeTest.php
index b0b84bc3..3216e417 100644
--- a/tests/Unit/Crypt/RSA/ModeTest.php
+++ b/tests/Unit/Crypt/RSA/ModeTest.php
@@ -13,6 +13,8 @@ class Unit_Crypt_RSA_ModeTest extends PhpseclibTestCase
     {
         $plaintext = 'a';
 
+        $rsa = new Crypt_RSA();
+
         $privatekey = '-----BEGIN RSA PRIVATE KEY-----
 MIICXAIBAAKBgQCqGKukO1De7zhZj6+H0qtjTkVxwTCpvKe4eCZ0FPqri0cb2JZfXJ/DgYSF6vUp
 wmJG8wVQZKjeGcjDOL5UlsuusFncCzWBQ7RKNUSesmQRMSGkVb1/3j+skZ6UtW+5u09lHNsj6tQ5