Jest has incorrect test search path

[ghost]

Expected behavior (user story)

I want to run and complete tests using Jest with npm test

Actual behavior

Jest fails tests

Steps to reproduce

Run npm test

npm test

> [email protected] test /home/spoon/WebstormProjects/blockchain-IoT-core
> node scripts/test.js --env=jsdom

Error: Unknown config option "testMatch" with value "<rootDir>/src/**/__tests__/**/*.js?(x),<rootDir>/src/**/?(*.)(spec|test).js?(x)". This is either a typing error or a user mistake and fixing it will remove this message.
 PASS  src/App.test.js
 FAIL  scripts/test.js
  ● Test suite failed to run

    SyntaxError: Identifier 'jest' has already been declared
      
      at Runtime._execModule (node_modules/jest-runtime/build/index.js:442:13)
          at <anonymous>
      at process._tickCallback (internal/process/next_tick.js:118:7)

Test Suites: 1 failed, 1 passed, 2 total
Tests:       1 passed, 1 total
Snapshots:   0 total
Time:        1.36s
Ran all test suites.
npm ERR! Test failed.  See above for more details.

Looking at SyntaxError: Identifier 'jest' has already been declared we can tell that Jest tries to run scripts/test.js, treating it as test. This is because "testMatch" with value "<rootDir>/src/**/__tests__/**/*.js?(x),<rootDir>/src/**/?(*.)(spec|test).js?(x)" filter doesn't work in current Jest version (19.0.0+)

Related:
facebook/create-react-app#1319
https://facebook.github.io/jest/docs/en/configuration.html#testmatch-array-string