browser caching of static assets passes in gtmetrix but not in webpagetest

I see this result in webpagetest.org (truncated for brevity)

FAILED - (No max-age or expires) - http://thewinegod.com/wp-gdb-content/themes/startuply/js/lib/headhesive.min.js
FAILED - (No max-age or expires) - http://thewinegod.com/wp-gdb-content/themes/startuply/js/custom-isotope-portfolio.js
FAILED - (No max-age or expires) - http://thewinegod.com/wp-gdb-content/plugins/js_composer/assets/lib/prettyphoto/js/jquery.prettyPhoto.js
FAILED - (No max-age or expires) - http://thewinegod.com/wp-gdb-content/themes/startuply/js/custom.js
FAILED - (No max-age or expires) - WordPress › Error

I know for a fact that browser caching has been enabled ok for the site as gtmetrix and PageSpeed Insights essentially show no problems for these files.

Is this a webpagetest.org bug or something I’m missing

I have the same probem. Webpagetest reports the following:

[quote]FAILED - (No max-age or expires) - http://websitetechnology.com.au/wp-content/uploads/2014/07/master-window-cleaners-logo.png
FAILED - (No max-age or expires) - http://websitetechnology.com.au/wp-content/uploads/2014/07/phcs-logo.png
FAILED - (No max-age or expires) - http://websitetechnology.com.au/wp-content/uploads/2014/07/seatpack-logo.png
FAILED - (No max-age or expires) - http://websitetechnology.com.au/wp-content/uploads/2014/07/temper-temper-logo.png
FAILED - (No max-age or expires) - http://websitetechnology.com.au/wp-content/uploads/2014/07/turing-point-logo.png
FAILED - (No max-age or expires) - http://websitetechnology.com.au/wp-content/uploads/2014/07/taste-of-life-tours-logo.png[/quote]

Chrome developer tools shows the following in the response headers for https://websitetechnology.com.au/wp-content/uploads/2014/07/seatpack-logo.png

accept-ranges:bytes cache-control:public, max-age=31536000,public content-length:3491 content-type:image/png date:Tue, 05 Jan 2016 01:27:55 GMT etag:"da3-56528937-0" expires:Wed, 04 Jan 2017 01:27:55 GMT last-modified:Mon, 23 Nov 2015 03:34:15 GMT pragma:public server:LiteSpeed status:200 vary:User-Agent

Do you have links to the actual test results? The headers should be available there as well.