Angular 9 + CLI (TypeScript) – How to stop generating .spec.ts test files

For Angular 9+ (version 6+ below)

1) Copy snippet to the root of angular.json, (configures settings to all projects/globally).
2) Or copy snippet to the root of a specific project (projects.your-project-name) in angular.json (configures settings for a specific project).

"schematics": {
  "@schematics/angular:component": {
    "style": "scss",
    "skipTests": true
  },
  "@schematics/angular:class": {
    "skipTests": true
  },
  "@schematics/angular:directive": {
    "skipTests": true
  },
  "@schematics/angular:pipe": {
    "skipTests": true
  },
  "@schematics/angular:service": {
    "skipTests": true
  }
},

All configurable options per type of file Schematic Options:

"schematics": {
  "@schematics/angular:component": {
    "changeDetection": "Default",
    "entryComponent": false,
    "export": false,
    "flat": false,
    "inlineStyle": false,
    "inlineTemplate": false,
    "module": "",
    "prefix": "",
    "selector": "",
    "skipImport": false,
    "spec": true,
    "style": "css",
    "viewEncapsulation": "Emulated",
    "skipTests": "false"
  },
  "@schematics/angular:module": {
    "commonModule": true,
    "flat": false,
    "module": "",
    "routing": false,
    "routingScope": "Child"
  },
  "@schematics/angular:service": {
    "flat": true,
    "skipTests": true
  },
  "@schematics/angular:pipe": {
    "export": false,
    "flat": true,
    "module": "",
    "skipImport": false,
    "skipTests": true
  },
  "@schematics/angular:directive": {
    "export": false,
    "flat": true,
    "module": "",
    "prefix": "app",
    "selector": "",
    "skipImport": false,
    "skipTests": true
  },
  "@schematics/angular:class": {
    "skipTests": true
  }
},

For Angular 6+

1) Copy snippet to the root of angular.json, (configures settings to all projects/globally).
2) Or copy snippet to the root of a specific project (projects.your-project-name) in angular.json (configures settings for a specific project).

"schematics": {
  "@schematics/angular:component": {
    "styleext": "scss",
    "spec": false
  },
  "@schematics/angular:class": {
    "spec": false
  },
  "@schematics/angular:directive": {
    "spec": false
  },
  "@schematics/angular:guard": {
    "spec": false
  },
  "@schematics/angular:module": {
    "spec": false
  },
  "@schematics/angular:pipe": {
    "spec": false
  },
  "@schematics/angular:service": {
    "spec": false
  }
},

All configurable options per type of file (Schematic Options):

"schematics": {
  "@schematics/angular:component": {
    "changeDetection": "Default",
    "export": false,
    "flat": false,
    "inlineStyle": false,
    "inlineTemplate": false,
    "module": "",
    "prefix": "",
    "selector": "",
    "skipImport": false,
    "spec": true,
    "styleext": "css",
    "viewEncapsulation": "Emulated"
  },
  "@schematics/angular:module": {
    "commonModule": true,
    "flat": false,
    "module": "",
    "routing": false,
    "routingScope": "Child",
    "spec": true
  },
  "@schematics/angular:service": {
    "flat": true,
    "spec": true
  },
  "@schematics/angular:pipe": {
    "export": false,
    "flat": true,
    "module": "",
    "skipImport": false,
    "spec": true
  },
  "@schematics/angular:directive": {
    "export": false,
    "flat": true,
    "module": "",
    "prefix": "app",
    "selector": "",
    "skipImport": false,
    "spec": true
  },
  "@schematics/angular:class": {
    "spec": true
  }
},

Angular CLI configuration with Angular CLI

ERROR:

The ng set defaults.spec.component false command results in the error: get/set have been deprecated in favor of the config command.

ng set got changed to ng config.

Using the Angular CLI (config command usage):

The settings for generating specs, inline templates, inline styling etc. within angular.json are now persisted inside the schematics.@schematics/angular.<file-type>.<setting>.

Run ng config schematics.@schematics/angular.component.spec false to configure spec for components. This command adds the setting inside the schematics property within the angular.json file.

Angular CLI workspace file (angular.json) on Angular Github

Schematic options inside schema.json

How to do X in Angular CLI v6