diff --git a/pkg/activator/certificate/tls_context.go b/pkg/activator/certificate/tls_context.go
index 551aa6d01bcf..92903c5e88d2 100644
--- a/pkg/activator/certificate/tls_context.go
+++ b/pkg/activator/certificate/tls_context.go
@@ -57,14 +57,14 @@ func dialTLSContext(ctx context.Context, network, addr string, cr *CertCache) (n
 
 func verifySAN(san string) func(tls.ConnectionState) error {
 	return func(cs tls.ConnectionState) error {
-		log.Println("In verifySAN1")
+		log.Printf("In verifySAN1: %s", san)
 		if len(cs.PeerCertificates) == 0 {
 			return errors.New("no PeerCertificates provided")
 		}
-		log.Println("In verifySAN2")
+		log.Printf("In verifySAN2: %s", san)
 		for _, name := range cs.PeerCertificates[0].DNSNames {
 			if name == san {
-				log.Println("In verifySAN3")
+				log.Printf("In verifySAN3 %s\n", name)
 				return nil
 			}
 		}