Jest tests fail after dependencies installed with 'yarn install'

[chatch]

If dependencies are installed with "npm install" the tests run fine.

However if installed with "yarn install" they will fail with module resolution failures:

======================================================================

Cannot find module 'stellar-base' from 'account_response.js'
  
  at Resolver.resolveModule (node_modules/jest-resolve/build/index.js:179:17)
  at Object.<anonymous> (node_modules/stellar-sdk/lib/account_response.js:13:19)

FAIL src/lib/tests/utils.test.js
● Test suite failed to run

Cannot find module 'stellar-base' from 'account_response.js'
  
  at Resolver.resolveModule (node_modules/jest-resolve/build/index.js:179:17)
  at Object.<anonymous> (node_modules/stellar-sdk/lib/account_response.js:13:19)

=====================================================================

It's not clear to me why this is as "stellar-base" is there under node_modules and require("stellar-base") statement seems fine.

Take a look at jest code and issues ...