Error: Cannot find module 'debug'

I have updated the Todos app - React branch - to meteor 1.3.4.1 and we I do npm run test-watch I am getting this error:

W20160629-12:01:53.665(2)? (STDERR)
W20160629-12:01:53.778(2)? (STDERR) /Users/PolGuixe/.meteor/packages/meteor-tool/.1.3.4_1.1rownv++os.osx.x86_64+web.browser+web.cordova/mt-os.osx.x86_64/dev_bundle/server-lib/node_modules/fibers/future.js:280
W20160629-12:01:53.779(2)? (STDERR)             				throw(ex);
W20160629-12:01:53.779(2)? (STDERR)             				      ^
W20160629-12:01:53.779(2)? (STDERR) Error: Cannot find module 'debug'
W20160629-12:01:53.805(2)? (STDERR)     at Function.Module._resolveFilename (module.js:338:15)
W20160629-12:01:53.806(2)? (STDERR)     at Function.Module._load (module.js:280:25)
W20160629-12:01:53.807(2)? (STDERR)     at Module.require (module.js:364:17)
W20160629-12:01:53.807(2)? (STDERR)     at require (module.js:380:17)
W20160629-12:01:53.808(2)? (STDERR)     at Object.<anonymous> (/Users/PolGuixe/.meteor/packages/practicalmeteor_mocha/.2.4.5_4.19hsmgq++os+web.browser+web.cordova/npm/node_modules1/mocha/lib/runnable.js:7:13)
W20160629-12:01:53.808(2)? (STDERR)     at Module._compile (module.js:456:26)
W20160629-12:01:53.808(2)? (STDERR)     at Object.Module._extensions..js (module.js:474:10)
W20160629-12:01:53.808(2)? (STDERR)     at Module.load (module.js:356:32)
W20160629-12:01:53.809(2)? (STDERR)     at Module.Mp.load (/Users/PolGuixe/.meteor/packages/babel-compiler/.6.8.3.1gmqhkh++os+web.browser+web.cordova/npm/node_modules/reify/node/runtime.js:16:23)
W20160629-12:01:53.809(2)? (STDERR)     at Function.Module._load (module.js:312:12)

Anyone has experienced this error?