diff --git a/tester/certificates/cn/cafile.pem b/tester/certificates/cn/cafile.pem
index 2fd957d39e45d81c401f8d4dc103dcea1a2b2b87..43437333b7b1b0225bfaa0eeb97ce0a0d2c028df 100644
--- a/tester/certificates/cn/cafile.pem
+++ b/tester/certificates/cn/cafile.pem
@@ -18,3 +18,29 @@ axGKc0DjiJPypU/NsAf4Yu0nOnY8pHqJJCB0AWVoAPM7vGYPWpeH7LSdGZLuT9eK
 FUWGJhPnkrnklmBdVB0l7qXYjR5uf766HDkoDxuLhNifow3IYvsS+L2Y6puRQb9w
 HLMDE29mBDl0WyoX3h0yR0EiAO15V9A7I10=
 -----END CERTIFICATE-----
+
+UTN USERFirst Hardware Root CA, used for *.linphone.org
+==============================
+-----BEGIN CERTIFICATE-----
+MIIEdDCCA1ygAwIBAgIQRL4Mi1AAJLQR0zYq/mUK/TANBgkqhkiG9w0BAQUFADCBlzELMAkGA1UE
+BhMCVVMxCzAJBgNVBAgTAlVUMRcwFQYDVQQHEw5TYWx0IExha2UgQ2l0eTEeMBwGA1UEChMVVGhl
+IFVTRVJUUlVTVCBOZXR3b3JrMSEwHwYDVQQLExhodHRwOi8vd3d3LnVzZXJ0cnVzdC5jb20xHzAd
+BgNVBAMTFlVUTi1VU0VSRmlyc3QtSGFyZHdhcmUwHhcNOTkwNzA5MTgxMDQyWhcNMTkwNzA5MTgx
+OTIyWjCBlzELMAkGA1UEBhMCVVMxCzAJBgNVBAgTAlVUMRcwFQYDVQQHEw5TYWx0IExha2UgQ2l0
+eTEeMBwGA1UEChMVVGhlIFVTRVJUUlVTVCBOZXR3b3JrMSEwHwYDVQQLExhodHRwOi8vd3d3LnVz
+ZXJ0cnVzdC5jb20xHzAdBgNVBAMTFlVUTi1VU0VSRmlyc3QtSGFyZHdhcmUwggEiMA0GCSqGSIb3
+DQEBAQUAA4IBDwAwggEKAoIBAQCx98M4P7Sof885glFn0G2f0v9Y8+efK+wNiVSZuTiZFvfgIXlI
+wrthdBKWHTxqctU8EGc6Oe0rE81m65UJM6Rsl7HoxuzBdXmcRl6Nq9Bq/bkqVRcQVLMZ8Jr28bFd
+tqdt++BxF2uiiPsA3/4aMXcMmgF6sTLjKwEHOG7DpV4jvEWbe1DByTCP2+UretNb+zNAHqDVmBe8
+i4fDidNdoI6yqqr2jmmIBsX6iSHzCJ1pLgkzmykNRg+MzEk0sGlRvfkGzWitZky8PqxhvQqIDsjf
+Pe58BEydCl5rkdbux+0ojatNh4lz0G6k0B4WixThdkQDf2Os5M1JnMWS9KsyoUhbAgMBAAGjgbkw
+gbYwCwYDVR0PBAQDAgHGMA8GA1UdEwEB/wQFMAMBAf8wHQYDVR0OBBYEFKFyXyYbKJhDlV0HN9WF
+lp1L0sNFMEQGA1UdHwQ9MDswOaA3oDWGM2h0dHA6Ly9jcmwudXNlcnRydXN0LmNvbS9VVE4tVVNF
+UkZpcnN0LUhhcmR3YXJlLmNybDAxBgNVHSUEKjAoBggrBgEFBQcDAQYIKwYBBQUHAwUGCCsGAQUF
+BwMGBggrBgEFBQcDBzANBgkqhkiG9w0BAQUFAAOCAQEARxkP3nTGmZev/K0oXnWO6y1n7k57K9cM
+//bey1WiCuFMVGWTYGufEpytXoMs61quwOQt9ABjHbjAbPLPSbtNk28GpgoiskliCE7/yMgUsogW
+XecB5BKV5UU0s4tpvc+0hY91UZ59Ojg6FEgSxvunOxqNDYJAB+gECJChicsZUN/KHAG8HQQZexB2
+lzvukJDKxA4fFm517zP4029bHpbj4HR3dHuKom4t3XbWOTCC8KucUvIqx69JXn7HaOWCgchqJ/kn
+iCrVWFCVH/A7HFe7fRQ5YiuayZSSKqMiDP+JJn1fIytH1xUdqWqeUQ0qUZ6B+dQ7XnASfxAynB67
+nfhmqA==
+-----END CERTIFICATE-----