diff --git a/collects/meta/props b/collects/meta/props
index c3d80495b9..4344a49b8b 100755
--- a/collects/meta/props
+++ b/collects/meta/props
@@ -1840,7 +1840,10 @@ path/s is either such a string or a list of them.
 "collects/tests/racket/pconvert.rktl" drdr:command-line #f
 "collects/tests/racket/place-chan-rand-help.rkt" responsible (tewk)
 "collects/tests/racket/place-chan-rand.rkt" responsible (tewk) drdr:random #t
+"collects/tests/racket/place-channel-fd.rkt" responsible (tewk) drdr:command-line (racket "-tm" *)
+"collects/tests/racket/place-channel-fd2.rkt" responsible (tewk) drdr:command-line (racket "-tm" *)
 "collects/tests/racket/place-channel-ffi.rkt" responsible (tewk) drdr:command-line (racket "-tm" *)
+"collects/tests/racket/place-channel-socket.rkt" responsible (tewk) drdr:command-line (racket "-tm" *)
 "collects/tests/racket/place-channel.rkt" responsible (tewk) drdr:command-line (racket "-tm" *) drdr:timeout 300
 "collects/tests/racket/place.rktl" responsible (tewk) drdr:command-line (racket "-f" *)
 "collects/tests/racket/port.rktl" drdr:command-line #f