Unable to run Meteor Test despite setting TEST_BROWSER_DRIVER in environment variables

I have not been able to test my meteor app at all, previously at v1.4, I managed to launch the tests, after upgrading to 1.6, I have not been able to run the tests despite my efforts. I hope anyone can help.

Operating System: Windows 10.

Current Meteor Version: 1.6

In my environment variables, I have set path to point to my chromedriver, but still no success at all.

 C:\Users\Username\Documents\Dev\Proj\infilerp>TEST_BROWSER_DRIVER=chrome meteor test --once --driver-package meteortesting:mocha
'TEST_BROWSER_DRIVER' is not recognized as an internal or external command,
operable program or batch file.  



C:\Users\Username\Documents\Dev\Proj\infilerp>meteor test --full-app --

driver-package meteortesting:mocha --port 8080
[[[[[ Tests ]]]]]

=> Started proxy.
=> A patch (Meteor 1.6.1.3) for your current release is available!
   Update this project now with 'meteor update --patch'.
=> Started MongoDB.
I20180730-17:58:52.807(8)? superadmin created
I20180730-17:58:53.166(8)?
I20180730-17:58:53.167(8)? --------------------------------
I20180730-17:58:53.167(8)? --- RUNNING APP SERVER TESTS ---
I20180730-17:58:53.168(8)? --------------------------------
I20180730-17:58:53.168(8)?
I20180730-17:58:53.168(8)?
I20180730-17:58:53.169(8)?
I20180730-17:58:53.169(8)?   0 passing (1ms)
I20180730-17:58:53.170(8)?
I20180730-17:58:53.171(8)?
I20180730-17:58:53.171(8)? --------------------------------
I20180730-17:58:53.172(8)? --- RUNNING APP CLIENT TESTS ---
I20180730-17:58:53.172(8)? --------------------------------
W20180730-17:58:53.281(8)? (STDERR) C:\Users\Username\AppData\Local\.meteor\packages\meteor-tool\1.6.1\mt-os.windows.x86_64\dev_bundle\server-lib\node_modules\fibers\future.js:280
W20180730-17:58:53.282(8)? (STDERR)                                             throw(ex);
W20180730-17:58:53.283(8)? (STDERR)                                             ^
W20180730-17:58:53.283(8)? (STDERR)
W20180730-17:58:53.283(8)? (STDERR) Error: Unknown driver "C:\Users\Username\Documents\Dev\Proj\infilerp\node_modules\chromedriver\lib\chromedriver\chromedriver.exe". browser-tests package requires that you set the TEST_BROWSER_DRIVER environment variable to one of the following: chrome, nightmare, phantomjs, puppeteer
W20180730-17:58:53.284(8)? (STDERR)     at startBrowser (packages/meteortesting:browser-tests/server.js:39:13)
W20180730-17:58:53.284(8)? (STDERR)     at clientTests (packages/meteortesting:mocha/server.js:138:3)
W20180730-17:58:53.284(8)? (STDERR)     at serverTests (packages/meteortesting:mocha/server.js:168:7)
W20180730-17:58:53.285(8)? (STDERR)     at mochaInstance.run.failureCount (packages/meteortesting:mocha/server.js:118:13)
W20180730-17:58:53.285(8)? (STDERR)     at done 

...    
=> Exited with code: 1