diff --git a/tests/Grant/AuthCodeGrantTest.php b/tests/Grant/AuthCodeGrantTest.php
index 564389e2..6f91fc0f 100644
--- a/tests/Grant/AuthCodeGrantTest.php
+++ b/tests/Grant/AuthCodeGrantTest.php
@@ -540,7 +540,6 @@ class AuthCodeGrantTest extends TestCase
         $client = new ClientEntity();
         $client->setIdentifier('foo');
         $client->setRedirectUri('http://foo/bar');
-        $client->setIsConfidential();
         $clientRepositoryMock = $this->getMockBuilder(ClientRepositoryInterface::class)->getMock();
         $clientRepositoryMock->method('getClientEntity')->willReturn($client);
 
@@ -1560,7 +1559,6 @@ class AuthCodeGrantTest extends TestCase
         $client = new ClientEntity();
         $client->setIdentifier('foo');
         $client->setRedirectUri('http://foo/bar');
-        $client->setIsConfidential();
         $clientRepositoryMock = $this->getMockBuilder(ClientRepositoryInterface::class)->getMock();
         $clientRepositoryMock->method('getClientEntity')->willReturn($client);
 
@@ -1634,7 +1632,6 @@ class AuthCodeGrantTest extends TestCase
         $client = new ClientEntity();
         $client->setIdentifier('foo');
         $client->setRedirectUri('http://foo/bar');
-        $client->setIsConfidential();
         $clientRepositoryMock = $this->getMockBuilder(ClientRepositoryInterface::class)->getMock();
         $clientRepositoryMock->method('getClientEntity')->willReturn($client);
 
@@ -1707,7 +1704,6 @@ class AuthCodeGrantTest extends TestCase
         $client = new ClientEntity();
         $client->setIdentifier('foo');
         $client->setRedirectUri('http://foo/bar');
-        $client->setIsConfidential();
         $clientRepositoryMock = $this->getMockBuilder(ClientRepositoryInterface::class)->getMock();
         $clientRepositoryMock->method('getClientEntity')->willReturn($client);