diff --git a/unix/syscall_netbsd_test.go b/unix/syscall_netbsd_test.go
index 2316d264..aac43208 100644
--- a/unix/syscall_netbsd_test.go
+++ b/unix/syscall_netbsd_test.go
@@ -5,7 +5,6 @@
 package unix_test
 
 import (
-	"bytes"
 	"os"
 	"testing"
 
@@ -39,7 +38,7 @@ func TestIoctlPtmget(t *testing.T) {
 		t.Fatalf("IoctlGetPtmget: %v\n", err)
 	}
 
-	t.Logf("sfd = %v, ptsname = %v", ptm.Sfd, string(ptm.Sn[:bytes.IndexByte(ptm.Sn[:], 0)]))
+	t.Logf("sfd = %v, ptsname = %v", ptm.Sfd, unix.ByteSliceToString(ptm.Sn[:]))
 }
 
 func TestStatvfs(t *testing.T) {