diff --git a/tests/Unit/SMTP/SmtpClientFactoryTest.php b/tests/Unit/SMTP/SmtpClientFactoryTest.php
index 456cb0c98f..9e679f068d 100644
--- a/tests/Unit/SMTP/SmtpClientFactoryTest.php
+++ b/tests/Unit/SMTP/SmtpClientFactoryTest.php
@@ -43,19 +43,6 @@ protected function setUp(): void {
 		$this->factory = new SmtpClientFactory($this->config, $this->crypto, $this->hostNameFactory);
 	}
 
-	public function testPhpMailTransport() {
-		$account = $this->createMock(Account::class);
-		$this->config->expects($this->once())
-			->method('getSystemValue')
-			->with('app.mail.transport', 'smtp')
-			->willReturn('php-mail');
-
-		$transport = $this->factory->create($account);
-
-		$this->assertNotNull($transport);
-		$this->assertInstanceOf(Horde_Mail_Transport_Mail::class, $transport);
-	}
-
 	public function testSmtpTransport() {
 		$mailAccount = new MailAccount([
 			'smtpHost' => 'smtp.domain.tld',