Problems with regexp in commitinfo

[George]

I am having problems getting the regexp working in commitinfo script
(cvs 1.11.2):

I want a commit in any file in the "testapp" module under $CVSROOT to
trigger my script.  So I set up commitinfo as follows:
testapp $CVSROOT/CVSROOT/commitcheck

The problem is that not only do commits in files in $CVSROOT/testapp
trigger the script, but all files with the word "testapp" anywhere in
the path seem to trigger the script.  For example, a commit of
"$CVSROOT/someotherproject/testapp/somefile.txt" also triggers the
script.

Is there a more proper way to code the commitinfo file?  I tried this
with the same results:
^testapp $CVSROOT/CVSROOT/commitcheck