diff --git a/src/lib/application/application.factory.test.ts b/src/lib/application/application.factory.test.ts
index e88626f10..1a99cc891 100644
--- a/src/lib/application/application.factory.test.ts
+++ b/src/lib/application/application.factory.test.ts
@@ -19,7 +19,7 @@ describe('Application Factory', () => {
         .runSchematicAsync('application', options)
         .toPromise();
       const files: string[] = tree.files;
-      expect(files).toEqual([
+      expect(files.sort()).toEqual([
         '/project/.eslintrc.js',
         '/project/.gitignore',
         '/project/.prettierrc',
@@ -35,7 +35,7 @@ describe('Application Factory', () => {
         '/project/src/main.ts',
         '/project/test/app.e2e-spec.ts',
         '/project/test/jest-e2e.json',
-      ]);
+      ].sort());
 
       expect(
         JSON.parse(tree.readContent('/project/package.json')),
@@ -51,7 +51,7 @@ describe('Application Factory', () => {
         .runSchematicAsync('application', options)
         .toPromise();
       const files: string[] = tree.files;
-      expect(files).toEqual([
+      expect(files.sort()).toEqual([
         `/project.foo.bar/.eslintrc.js`,
         `/project.foo.bar/.gitignore`,
         `/project.foo.bar/.prettierrc`,
@@ -67,7 +67,7 @@ describe('Application Factory', () => {
         `/project.foo.bar/src/main.ts`,
         `/project.foo.bar/test/app.e2e-spec.ts`,
         `/project.foo.bar/test/jest-e2e.json`,
-      ]);
+      ].sort());
 
       expect(
         JSON.parse(tree.readContent('/project.foo.bar/package.json')),
@@ -83,7 +83,7 @@ describe('Application Factory', () => {
         .runSchematicAsync('application', options)
         .toPromise();
       const files: string[] = tree.files;
-      expect(files).toEqual([
+      expect(files.sort()).toEqual([
         '/awesome-project/.eslintrc.js',
         '/awesome-project/.gitignore',
         '/awesome-project/.prettierrc',
@@ -99,7 +99,7 @@ describe('Application Factory', () => {
         '/awesome-project/src/main.ts',
         '/awesome-project/test/app.e2e-spec.ts',
         '/awesome-project/test/jest-e2e.json',
-      ]);
+      ].sort());
 
       expect(
         JSON.parse(tree.readContent('/awesome-project/package.json')),
@@ -115,7 +115,7 @@ describe('Application Factory', () => {
         .runSchematicAsync('application', options)
         .toPromise();
       const files: string[] = tree.files;
-      expect(files).toEqual([
+      expect(files.sort()).toEqual([
         '/_awesome-project/.eslintrc.js',
         '/_awesome-project/.gitignore',
         '/_awesome-project/.prettierrc',
@@ -131,7 +131,7 @@ describe('Application Factory', () => {
         '/_awesome-project/src/main.ts',
         '/_awesome-project/test/app.e2e-spec.ts',
         '/_awesome-project/test/jest-e2e.json',
-      ]);
+      ].sort());
 
       expect(
         JSON.parse(tree.readContent('/_awesome-project/package.json')),
@@ -147,7 +147,7 @@ describe('Application Factory', () => {
         .runSchematicAsync('application', options)
         .toPromise();
       const files: string[] = tree.files;
-      expect(files).toEqual([
+      expect(files.sort()).toEqual([
         '/@/package/.eslintrc.js',
         '/@/package/.gitignore',
         '/@/package/.prettierrc',
@@ -163,7 +163,7 @@ describe('Application Factory', () => {
         '/@/package/src/main.ts',
         '/@/package/test/app.e2e-spec.ts',
         '/@/package/test/jest-e2e.json',
-      ]);
+      ].sort());
 
       expect(
         JSON.parse(tree.readContent('/@/package/package.json')),
@@ -179,7 +179,7 @@ describe('Application Factory', () => {
         .runSchematicAsync('application', options)
         .toPromise();
       const files: string[] = tree.files;
-      expect(files).toEqual([
+      expect(files.sort()).toEqual([
         '/.eslintrc.js',
         '/.gitignore',
         '/.prettierrc',
@@ -195,7 +195,7 @@ describe('Application Factory', () => {
         '/src/main.ts',
         '/test/app.e2e-spec.ts',
         '/test/jest-e2e.json',
-      ]);
+      ].sort());
 
       expect(JSON.parse(tree.readContent('/package.json'))).toMatchObject({
         name: path.basename(process.cwd()),
@@ -211,7 +211,7 @@ describe('Application Factory', () => {
             .runSchematicAsync('application', options)
             .toPromise();
           const files: string[] = tree.files;
-          expect(files).toEqual([
+          expect(files.sort()).toEqual([
             '/@scope/package/.eslintrc.js',
             '/@scope/package/.gitignore',
             '/@scope/package/.prettierrc',
@@ -227,7 +227,7 @@ describe('Application Factory', () => {
             '/@scope/package/src/main.ts',
             '/@scope/package/test/app.e2e-spec.ts',
             '/@scope/package/test/jest-e2e.json',
-          ]);
+          ].sort());
 
           expect(
             JSON.parse(tree.readContent('/@scope/package/package.json')),
@@ -243,7 +243,7 @@ describe('Application Factory', () => {
             .runSchematicAsync('application', options)
             .toPromise();
           const files: string[] = tree.files;
-          expect(files).toEqual([
+          expect(files.sort()).toEqual([
             '/@-/package/.eslintrc.js',
             '/@-/package/.gitignore',
             '/@-/package/.prettierrc',
@@ -259,7 +259,7 @@ describe('Application Factory', () => {
             '/@-/package/src/main.ts',
             '/@-/package/test/app.e2e-spec.ts',
             '/@-/package/test/jest-e2e.json',
-          ]);
+          ].sort());
 
           expect(
             JSON.parse(tree.readContent('/@-/package/package.json')),
@@ -278,7 +278,7 @@ describe('Application Factory', () => {
       .runSchematicAsync('application', options)
       .toPromise();
     const files: string[] = tree.files;
-    expect(files).toEqual([
+    expect(files.sort()).toEqual([
       '/123/.eslintrc.js',
       '/123/.gitignore',
       '/123/.prettierrc',
@@ -294,7 +294,7 @@ describe('Application Factory', () => {
       '/123/src/main.ts',
       '/123/test/app.e2e-spec.ts',
       '/123/test/jest-e2e.json',
-    ]);
+    ].sort());
 
     expect(
       JSON.parse(tree.readContent('/123/package.json')),
@@ -311,7 +311,7 @@ describe('Application Factory', () => {
       .runSchematicAsync('application', options)
       .toPromise();
     const files: string[] = tree.files;
-    expect(files).toEqual([
+    expect(files.sort()).toEqual([
       '/project/.babelrc',
       '/project/.gitignore',
       '/project/.prettierrc',
@@ -328,7 +328,7 @@ describe('Application Factory', () => {
       '/project/src/main.js',
       '/project/test/app.e2e-spec.js',
       '/project/test/jest-e2e.json',
-    ]);
+    ].sort());
 
     expect(JSON.parse(tree.readContent('/project/package.json'))).toMatchObject(
       {
@@ -345,7 +345,7 @@ describe('Application Factory', () => {
       .runSchematicAsync('application', options)
       .toPromise();
     const files: string[] = tree.files;
-    expect(files).toEqual([
+    expect(files.sort()).toEqual([
       '/app/.eslintrc.js',
       '/app/.gitignore',
       '/app/.prettierrc',
@@ -361,10 +361,94 @@ describe('Application Factory', () => {
       '/app/src/main.ts',
       '/app/test/app.e2e-spec.ts',
       '/app/test/jest-e2e.json',
-    ]);
+    ].sort());
 
     expect(JSON.parse(tree.readContent('/app/package.json'))).toMatchObject({
       name: 'project',
     });
   });
+  it('should not create a spec file', async () => {
+    const options: ApplicationOptions = {
+      name: 'project',
+      spec: false,
+      language: 'js',
+    };
+    const tree: UnitTestTree = await runner
+      .runSchematicAsync('application', options)
+      .toPromise();
+    const files: string[] = tree.files;
+    expect(files.sort()).toEqual([
+      '/project/.babelrc',
+      '/project/.gitignore',
+      '/project/.prettierrc',
+      '/project/README.md',
+      '/project/index.js',
+      '/project/jsconfig.json',
+      '/project/nest-cli.json',
+      '/project/nodemon.json',
+      '/project/package.json',
+      '/project/src/app.controller.js',
+      '/project/src/app.module.js',
+      '/project/src/app.service.js',
+      '/project/src/main.js',
+      '/project/test/jest-e2e.json',
+    ].sort());
+  });
+  it('should create a spec file', async () => {
+    const options: ApplicationOptions = {
+      name: 'project',
+      spec: true,
+      language: 'js',
+    };
+    const tree: UnitTestTree = await runner
+      .runSchematicAsync('application', options)
+      .toPromise();
+    const files: string[] = tree.files;
+    expect(files.sort()).toEqual([
+      '/project/.babelrc',
+      '/project/.gitignore',
+      '/project/.prettierrc',
+      '/project/README.md',
+      '/project/index.js',
+      '/project/jsconfig.json',
+      '/project/nest-cli.json',
+      '/project/nodemon.json',
+      '/project/package.json',
+      '/project/src/app.controller.js',
+      '/project/src/app.controller.spec.js',
+      '/project/src/app.module.js',
+      '/project/src/app.service.js',
+      '/project/src/main.js',
+      '/project/test/app.e2e-spec.js',
+      '/project/test/jest-e2e.json',
+    ].sort());
+  });
+  it('should create a spec file with custom file suffix', async () => {
+    const options: ApplicationOptions = {
+      name: 'project',
+      spec: true,
+      specFileSuffix: 'test',
+    };
+    const tree: UnitTestTree = await runner
+      .runSchematicAsync('application', options)
+      .toPromise();
+    const files: string[] = tree.files;
+    expect(files.sort()).toEqual([
+      '/project/.eslintrc.js',
+      '/project/.gitignore',
+      '/project/.prettierrc',
+      '/project/README.md',
+      '/project/nest-cli.json',
+      '/project/package.json',
+      '/project/tsconfig.build.json',
+      '/project/tsconfig.json',
+      '/project/src/app.controller.test.ts',
+      '/project/src/app.controller.ts',
+      '/project/src/app.module.ts',
+      '/project/src/app.service.ts',
+      '/project/src/main.ts',
+      '/project/test/app.e2e-test.ts',
+      '/project/test/jest-e2e.json',
+    ].sort());
+  });
 });
diff --git a/src/lib/application/application.factory.ts b/src/lib/application/application.factory.ts
index 4ff0c2346..2b57ffb40 100644
--- a/src/lib/application/application.factory.ts
+++ b/src/lib/application/application.factory.ts
@@ -1,8 +1,10 @@
 import { join, Path, strings } from '@angular-devkit/core';
 import {
   apply,
+  filter,
   mergeWith,
   move,
+  noop,
   Rule,
   Source,
   template,
@@ -40,6 +42,9 @@ function transform(options: ApplicationOptions): ApplicationOptions {
   target.language = !!target.language ? target.language : DEFAULT_LANGUAGE;
   target.name = resolvePackageName(target.name.toString());
   target.version = !!target.version ? target.version : DEFAULT_VERSION;
+  target.specFileSuffix = normalizeToKebabOrSnakeCase(
+    options.specFileSuffix || 'spec',
+  );
 
   target.packageManager =
     !target.packageManager || target.packageManager === 'undefined'
@@ -76,6 +81,14 @@ function resolvePackageName(path: string) {
 
 function generate(options: ApplicationOptions, path: string): Source {
   return apply(url(join('./files' as Path, options.language)), [
+    options.spec ? noop() : filter((path) => !path.endsWith('__specFileSuffix__.ts')),
+    options.spec
+      ? noop()
+      : filter((path) => {
+        const languageExtension = options.language || 'ts';
+        const suffix = `__specFileSuffix__.${languageExtension}`;
+        return !path.endsWith(suffix);
+      }),
     template({
       ...strings,
       ...options,
diff --git a/src/lib/application/application.schema.d.ts b/src/lib/application/application.schema.d.ts
index d342fd72b..e5e25a896 100644
--- a/src/lib/application/application.schema.d.ts
+++ b/src/lib/application/application.schema.d.ts
@@ -40,4 +40,13 @@ export interface ApplicationOptions {
    * Nest included development dependencies (comma separated values).
    */
   devDependencies?: string;
+  /**
+   * Specifies if a spec file is generated.
+   */
+  spec?: boolean;
+  /**
+   * Specifies the file suffix of spec files.
+   * @default "spec"
+   */
+  specFileSuffix?: string;
 }
diff --git a/src/lib/application/files/js/src/app.controller.spec.js b/src/lib/application/files/js/src/app.controller.__specFileSuffix__.js
similarity index 100%
rename from src/lib/application/files/js/src/app.controller.spec.js
rename to src/lib/application/files/js/src/app.controller.__specFileSuffix__.js
diff --git a/src/lib/application/files/js/test/app.e2e-spec.js b/src/lib/application/files/js/test/app.e2e-__specFileSuffix__.js
similarity index 100%
rename from src/lib/application/files/js/test/app.e2e-spec.js
rename to src/lib/application/files/js/test/app.e2e-__specFileSuffix__.js
diff --git a/src/lib/application/files/ts/src/app.controller.spec.ts b/src/lib/application/files/ts/src/app.controller.__specFileSuffix__.ts
similarity index 100%
rename from src/lib/application/files/ts/src/app.controller.spec.ts
rename to src/lib/application/files/ts/src/app.controller.__specFileSuffix__.ts
diff --git a/src/lib/application/files/ts/test/app.e2e-spec.ts b/src/lib/application/files/ts/test/app.e2e-__specFileSuffix__.ts
similarity index 100%
rename from src/lib/application/files/ts/test/app.e2e-spec.ts
rename to src/lib/application/files/ts/test/app.e2e-__specFileSuffix__.ts
diff --git a/src/lib/application/schema.json b/src/lib/application/schema.json
index cf29882fc..dedd49be7 100644
--- a/src/lib/application/schema.json
+++ b/src/lib/application/schema.json
@@ -55,6 +55,16 @@
     "devDependencies": {
       "type": "string",
       "description": "Nest application development dependencies."
+    },
+    "spec": {
+      "type": "boolean",
+      "default": true,
+      "description": "Specifies if a spec file is generated."
+    },
+    "specFileSuffix": {
+      "type": "string",
+      "default": "spec",
+      "description": "Specifies the file suffix of spec files."
     }
   },
   "required": ["name"]