diff --git a/collects/meta/props b/collects/meta/props
index 165de3bb4d..469f8e558f 100755
--- a/collects/meta/props
+++ b/collects/meta/props
@@ -1558,6 +1558,7 @@ path/s is either such a string or a list of them.
 "collects/tests/planet/cmdline-tool.rkt" drdr:command-line #f
 "collects/tests/planet/examples/dummy-module.rkt" drdr:command-line #f
 "collects/tests/planet/examples/scribblings-package" drdr:command-line #f
+"collects/tests/planet/thread-safe-resolver.rkt" drdr:timeout 500
 "collects/tests/plot/run-tests.rkt" drdr:command-line (gracket-text "-t" *)
 "collects/tests/r6rs" responsible (mflatt)
 "collects/tests/racket" responsible (mflatt)