diff --git a/src/tunnel.zig b/src/tunnel.zig
index 1d1a2f3..b7389f0 100644
--- a/src/tunnel.zig
+++ b/src/tunnel.zig
@@ -47,6 +47,7 @@ pub fn close(self: *Tunnel) void {
 
 const Tunnel = @This();
 
+// TODO: this will fail if tests are run in parallel
 test "init with a known name" {
     var tun = try init("nyotun");
     defer tun.close();