Unable to compile simple TypeScript node-ts example

I am trying to learn https://github.com/TypeStrong/ts-node. I've written two files as a simplistic example. They are both in the same directory, which is currently not in the same folder as package.json

/package.json
/src/build-lib/run-ts.js
/src/build-lib/Test.ts

run-ts.js

require('ts-node').register();
const Test = require('./Test.ts').Test; // Tried with and without .ts extension
const tester = new Test();
tester.log('Message');

Test.ts

export class Test {
    log(message: string) {
        console.log(`Test ${message}`);
    } 
}

I'm running the following script:

ts-node src/build-scripts/gen-xml.js

And I'm getting the following compilation error

/Users/jmendes/gitclient/vcd-ui/content/core/node_modules/ts-node/src/index.ts:319
      throw new TSError(formatDiagnostics(diagnosticList, cwd, ts, lineOffset))
            ^
TSError: ⨯ Unable to compile TypeScript
src/build-scripts/Test.ts (7,36): Parameter 'message' implicitly has an 'any' type. (7006)
    at getOutput (/Users/jmendes/gitclient/vcd-ui/content/core/node_modules/ts-node/src/index.ts:319:17)
    at /Users/jmendes/gitclient/vcd-ui/content/core/node_modules/ts-node/src/index.ts:350:18

I expected to see "Test Message" on the console.

via Juan Mendes