Index: library/mongodb/tests/nsf-gridfs.test
===================================================================
diff -u -N -rc1f4cdc0b3367d4c0c2e69e4d983f45ed242fb83 -rce93f504db8a4a6b5e0ec2a85285d8443f033f0f
--- library/mongodb/tests/nsf-gridfs.test	(.../nsf-gridfs.test)	(revision c1f4cdc0b3367d4c0c2e69e4d983f45ed242fb83)
+++ library/mongodb/tests/nsf-gridfs.test	(.../nsf-gridfs.test)	(revision ce93f504db8a4a6b5e0ec2a85285d8443f033f0f)
@@ -36,6 +36,7 @@
 set dir [file dirname [file dirname [info script]]]
 set fn [glob -tails -directory $dir -- README*]
 ? {llength $fn} 1
+? {file readable [file join $dir $fn]} 1
 
 # gridfs::remove_file removes all files with the specified name
 # multiple store operations create "revisions" with different uploadDates