I am missing code coverage when I run npm test --code-coverage

Question

I am using an Angular 6 application. When I run the command ng test --code-coverage I get info if my tests are successful or failed but I don't get printed that in percentage like I should - so for example functions coverage is 80% etc.

After I run this command I can find the coverage folder in my application and I know if I open index.html I will get the percentages there, but I need to have this feature "live" so when i make changes the ng test command will re-run. I can't open index.html on every change I make.

My angular.json file - test property:

 "test": {
          "builder": "@angular-devkit/build-angular:karma",
          "options": {
            "main": "src/test.ts",
            "polyfills": "src/polyfills.ts",
            "tsConfig": "src/tsconfig.spec.json",
            "karmaConfig": "src/karma.conf.js",
            "styles": [
              "src/styles.css"
            ],
            "scripts": [],
            "assets": [
              "src/favicon.ico",
              "src/assets"
            ]
          }
        },

I tried explicitly adding "codeCoverage": true in my angular.json configuration but it still does not print the percentages in my terminal.