patch by proxy maintainer, P. Healy, April 2015
# Bug 509960
--- a/tests/pdumpfs-test_orig	2004-08-10 07:54:28.000000000 +0100
+++ b/tests/pdumpfs-test	2015-04-01 11:24:35.948633870 +0100
@@ -17,6 +17,7 @@
 
 ../pdumpfs src dest > tmp.log || exit 1
 diff -r src dest/$today/src || exit 1
+mkdir -p dest/$yesterday && rmdir dest/$yesterday
 mv dest/$today dest/$yesterday
 
 echo update > src/foo