diff --git a/acceptor/tcp_acceptor.go b/acceptor/tcp_acceptor.go
index 8976e2b2..2541819c 100644
--- a/acceptor/tcp_acceptor.go
+++ b/acceptor/tcp_acceptor.go
@@ -25,6 +25,7 @@ import (
 	"io"
 	"io/ioutil"
 	"net"
+	"fmt"
 
 	"github.com/mailgun/proxyproto"
 	"github.com/topfreegames/pitaya/v2/conn/codec"
@@ -79,11 +80,11 @@ func (t *tcpPlayerConn) GetNextMessage() (b []byte, err error) {
 func NewTCPAcceptor(addr string, certs ...string) *TCPAcceptor {
 	certificates := []tls.Certificate{}
 	if len(certs) != 2 && len(certs) != 0 {
-		panic(constants.ErrInvalidCertificates)
-	} else if len(certs) == 2 {
+		panic(constants.ErrIncorrectNumberOfCertificates)
+	} else if ( len(certs) == 2 && certs[0] != "" && certs[1] != "") {
 		cert, err := tls.LoadX509KeyPair(certs[0], certs[1])
 		if err != nil {
-			panic(constants.ErrInvalidCertificates)
+			panic(fmt.Errorf("%w: %w",constants.ErrInvalidCertificates,err))
 		}
 		certificates = append(certificates, cert)
 	}
diff --git a/acceptor/tcp_acceptor_test.go b/acceptor/tcp_acceptor_test.go
index 9a06afcd..65dff631 100644
--- a/acceptor/tcp_acceptor_test.go
+++ b/acceptor/tcp_acceptor_test.go
@@ -35,21 +35,21 @@ var tcpAcceptorTables = []struct {
 	name     string
 	addr     string
 	certs    []string
-	panicErr error
+	panicErr string
 }{
-	{"test_1", "0.0.0.0:0", []string{"./fixtures/server.crt", "./fixtures/server.key"}, nil},
-	{"test_2", "0.0.0.0:0", []string{}, nil},
-	{"test_3", "127.0.0.1:0", []string{"wqd"}, constants.ErrInvalidCertificates},
-	{"test_4", "127.0.0.1:0", []string{"wqd", "wqdqwd"}, constants.ErrInvalidCertificates},
-	{"test_5", "127.0.0.1:0", []string{"wqd", "wqdqwd", "wqdqdqwd"}, constants.ErrInvalidCertificates},
+	{"test_1", "0.0.0.0:0", []string{"./fixtures/server.crt", "./fixtures/server.key"}, ""},
+	{"test_2", "0.0.0.0:0", []string{}, ""},
+	{"test_3", "127.0.0.1:0", []string{"wqd"}, "certificates must be exactly two"},
+	{"test_4", "127.0.0.1:0", []string{"wqd", "wqdqwd"}, "invalid certificates: open wqd: no such file or directory"},
+	{"test_5", "127.0.0.1:0", []string{"wqd", "wqdqwd", "wqdqdqwd"}, "certificates must be exactly two"},
 }
 
 func TestNewTCPAcceptorGetConnChanAndGetAddr(t *testing.T) {
 	t.Parallel()
 	for _, table := range tcpAcceptorTables {
 		t.Run(table.name, func(t *testing.T) {
-			if table.panicErr != nil {
-				assert.PanicsWithValue(t, table.panicErr, func() {
+			if table.panicErr != "" {
+				assert.PanicsWithError(t, table.panicErr, func() {
 					NewTCPAcceptor(table.addr, table.certs...)
 				})
 			} else {
diff --git a/constants/errors.go b/constants/errors.go
index e7c37e9d..a9a705de 100644
--- a/constants/errors.go
+++ b/constants/errors.go
@@ -40,7 +40,8 @@ var (
 	ErrGroupAlreadyExists             = errors.New("group already exists")
 	ErrGroupNotFound                  = errors.New("group not found")
 	ErrIllegalUID                     = errors.New("illegal uid")
-	ErrInvalidCertificates            = errors.New("certificates must be exactly two")
+	ErrIncorrectNumberOfCertificates  = errors.New("certificates must be exactly two")
+	ErrInvalidCertificates            = errors.New("invalid certificates")
 	ErrInvalidSpanCarrier             = errors.New("tracing: invalid span carrier")
 	ErrKickingUsers                   = errors.New("failed to kick users, check array with failed uids")
 	ErrMemberAlreadyExists            = errors.New("member already exists in group")