diff --git a/tests/InternalCaptchaTest.php b/tests/InternalCaptchaTest.php
index 133e8774..efd84f7e 100644
--- a/tests/InternalCaptchaTest.php
+++ b/tests/InternalCaptchaTest.php
@@ -38,7 +38,7 @@ public function test_generate_html_captcha(): void
         $messages = array("captcha" => "Captcha");
 
         $captchaMock = $this->getMockBuilder(captcha\InternalCaptcha::class)
-            ->setMethods(['generate_captcha_challenge'])
+            ->onlyMethods(['generate_captcha_challenge'])
             ->getMock();
         $captchaMock->expects($this->once())
                     ->method('generate_captcha_challenge')