npm test fails on my mac with the following versions and output:

Node v4.5.0

[email protected] test /Volumes/Workspace/ts-loader
node test/run-tests.js

Using webpack version 1.13.2
Using typescript version 2.0.3

[...]

38 test suite(s) passed.

• _FLAKY_errors
• _FLAKY_tsconfigNotReadable
• aliasResolution
• basic
• codeSplitting
• conditionalRequire
• declarationDeps
• declarationOutput
• declarationWatch
• dependencyErrors
• es3
• es5
• es6
• es6codeSplitting
• es6resolveParent
• es6withCJS
• externals
• ignoreDiagnostics
• instance
• issue71
• issue81
• issue92
• jsx
• jsxPreserve
• large
• noErrorsPlugin
• node
• nodeResolution
• nolib
• npmLink
• replacement
• simpleDependency
• sourceMaps
• testLib
• tsconfigInvalid
• tsconfigInvalidFile
• tsconfigSearch
• typeSystemWatch

1 test suite(s) failed.

• html-webpack-plugin

npm ERR! Darwin 16.0.0
npm ERR! argv "/Users/niklas/.nvm/versions/node/v4.5.0/bin/node" "/Users/niklas/.nvm/versions/node/v4.5.0/bin/npm" "run" "comparison-tests"
npm ERR! node v4.5.0
npm ERR! npm v2.15.9
npm ERR! code ELIFECYCLE
npm ERR! [email protected] comparison-tests: npm link ./test/comparison-tests/testLib && node test/comparison-tests/run-tests.js
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the [email protected] comparison-tests script 'npm link ./test/comparison-tests/testLib && node test/comparison-tests/run-tests.js'.
npm ERR! This is most likely a problem with the ts-loader package,
npm ERR! not with npm itself.
npm ERR! Tell the author that this fails on your system:
npm ERR! npm link ./test/comparison-tests/testLib && node test/comparison-tests/run-tests.js
npm ERR! You can get information on how to open an issue for this project with:
npm ERR! npm bugs ts-loader
npm ERR! Or if that isn't available, you can get their info via:
npm ERR!
npm ERR! npm owner ls ts-loader
npm ERR! There is likely additional logging output above.

npm ERR! Please include the following file with any support request:
npm ERR! /Volumes/Workspace/ts-loader/npm-debug.log
child_process.js:508
throw err;
^

Error: Command failed: npm run comparison-tests
at checkExecSyncError (child_process.js:465:13)
at execSync (child_process.js:505:13)
at Object. (/Volumes/Workspace/ts-loader/test/run-tests.js:10:1)
at Module._compile (module.js:409:26)
at Object.Module._extensions..js (module.js:416:10)
at Module.load (module.js:343:32)
at Function.Module._load (module.js:300:12)
at Function.Module.runMain (module.js:441:10)
at startup (node.js:139:18)
at node.js:974:3
npm ERR! Test failed. See above for more details.