Running tests for output file plugin

[Nitin_Gupta3 (Nitin Gupta)]

I'm not able to run tests for logstash-output-file plugin.
While I'm able to execute "jruby -S bundle install" successfully.
but next command: "jruby -S bundle exec rspec" gives an error:

You have requested:

logstash-devutils >= 0

The bundle currently has logstash-devutils locked at 1.3.6.

Try running bundle update logstash-devutils

If you are updating multiple gems in your Gemfile at once,

try passing them all to bundle update

Run bundle install to install missing gems.

Running bundle update is of no help here.
Any hints on how to resolve this error?

jruby version (mac osx):

jruby -v

jruby 9.2.7.0 (2.5.3) 2019-04-09 8a269e3 Java HotSpot(TM) 64-Bit Server VM 25.60-b23 on 1.8.0_60-b27 +jit [darwin-x86_64]

[Nitin_Gupta3 (Nitin Gupta)]

I was able to resolve this. Used rvm and set default environment as jruby.