diff --git a/src/code_transformer/main.ts b/src/code_transformer/main.ts
index e670eaa7..f8b7083c 100644
--- a/src/code_transformer/main.ts
+++ b/src/code_transformer/main.ts
@@ -9,7 +9,15 @@
 
 import { join } from 'node:path'
 import { fileURLToPath } from 'node:url'
-import { CodeBlockWriter, Node, Project, SourceFile, SyntaxKind } from 'ts-morph'
+import {
+  CodeBlockWriter,
+  FormatCodeSettings,
+  Node,
+  Project,
+  QuoteKind,
+  SourceFile,
+  SyntaxKind,
+} from 'ts-morph'
 
 import { RcFileTransformer } from './rc_file_transformer.js'
 import type { AddMiddlewareEntry, EnvValidationDefinition } from '../types.js'
@@ -31,16 +39,19 @@ export class CodeTransformer {
   /**
    * Settings to use when persisting files
    */
-  #editorSettings = {
+  #editorSettings: FormatCodeSettings = {
     indentSize: 2,
     convertTabsToSpaces: true,
     trimTrailingWhitespace: true,
+    // @ts-expect-error SemicolonPreference doesn't seem to be re-exported from ts-morph
+    semicolons: 'remove',
   }
 
   constructor(cwd: URL) {
     this.#cwd = cwd
     this.#project = new Project({
       tsConfigFilePath: join(fileURLToPath(this.#cwd), 'tsconfig.json'),
+      manipulationSettings: { quoteKind: QuoteKind.Single },
     })
   }
 
@@ -177,6 +188,42 @@ export class CodeTransformer {
     await file.save()
   }
 
+  /**
+   * Add a new Japa plugin in the `tests/bootstrap.ts` file
+   */
+  async addJapaPlugin(
+    pluginCall: string,
+    importDeclaration: { isNamed: boolean; module: string; identifier: string }
+  ) {
+    /**
+     * Get the `tests/bootstrap.ts` source file
+     */
+    const testBootstrapUrl = fileURLToPath(new URL('./tests/bootstrap.ts', this.#cwd))
+    const file = this.#project.getSourceFileOrThrow(testBootstrapUrl)
+
+    /**
+     * Add the import declaration
+     */
+    file.addImportDeclaration({
+      ...(importDeclaration.isNamed
+        ? { namedImports: [importDeclaration.identifier] }
+        : { defaultImport: importDeclaration.identifier }),
+      moduleSpecifier: importDeclaration.module,
+    })
+
+    /**
+     * Insert the plugin call in the `plugins` array
+     */
+    const pluginsArray = file
+      .getVariableDeclaration('plugins')
+      ?.getInitializerIfKind(SyntaxKind.ArrayLiteralExpression)
+
+    if (pluginsArray) pluginsArray.addElement(pluginCall)
+
+    file.formatText(this.#editorSettings)
+    await file.save()
+  }
+
   /**
    * Add new env variable validation in the
    * `env.ts` file
diff --git a/tests/__snapshots__/code_transformer.spec.ts.cjs b/tests/__snapshots__/code_transformer.spec.ts.cjs
index 0566dcca..244c90fc 100644
--- a/tests/__snapshots__/code_transformer.spec.ts.cjs
+++ b/tests/__snapshots__/code_transformer.spec.ts.cjs
@@ -354,3 +354,25 @@ export default defineConfig({
 })
 "`
 
+exports[`Code transformer | addJapaPlugin > addJapaPlugin with named import 1`] = `"
+import app from '@adonisjs/core/services/app'
+import { assert } from '@japa/assert'
+import { fooPlugin } from '@adonisjs/foo/plugin/japa'
+
+export const plugins: Config['plugins'] = [
+  assert(),
+  fooPlugin(app)
+]
+"`
+
+exports[`Code transformer | addJapaPlugin > addJapaPlugin with default import 1`] = `"
+import app from '@adonisjs/core/services/app'
+import { assert } from '@japa/assert'
+import fooPlugin from '@adonisjs/foo/plugin/japa'
+
+export const plugins: Config['plugins'] = [
+  assert(),
+  fooPlugin()
+]
+"`
+
diff --git a/tests/code_transformer.spec.ts b/tests/code_transformer.spec.ts
index ba2c9fb4..317baa1f 100644
--- a/tests/code_transformer.spec.ts
+++ b/tests/code_transformer.spec.ts
@@ -506,3 +506,55 @@ test.group('Code transformer | addPreloadFile', (group) => {
     assert.equal(occurrences, 1)
   })
 })
+
+test.group('Code transformer | addJapaPlugin', (group) => {
+  group.each.setup(async ({ context }) => setupFakeAdonisproject(context.fs))
+
+  test('add named import', async ({ assert, fs }) => {
+    await fs.create(
+      'tests/bootstrap.ts',
+      `
+      import app from '@adonisjs/core/services/app'
+      import { assert } from '@japa/assert'
+
+      export const plugins: Config['plugins'] = [
+        assert(),
+      ]`
+    )
+
+    const transformer = new CodeTransformer(fs.baseUrl)
+
+    await transformer.addJapaPlugin('fooPlugin(app)', {
+      module: '@adonisjs/foo/plugin/japa',
+      identifier: 'fooPlugin',
+      isNamed: true,
+    })
+
+    const file = await fs.contents('tests/bootstrap.ts')
+    assert.snapshot(file).match()
+  })
+
+  test('add default import', async ({ assert, fs }) => {
+    await fs.create(
+      'tests/bootstrap.ts',
+      `
+      import app from '@adonisjs/core/services/app'
+      import { assert } from '@japa/assert'
+
+      export const plugins: Config['plugins'] = [
+        assert(),
+      ]`
+    )
+
+    const transformer = new CodeTransformer(fs.baseUrl)
+
+    await transformer.addJapaPlugin('fooPlugin()', {
+      module: '@adonisjs/foo/plugin/japa',
+      identifier: 'fooPlugin',
+      isNamed: false,
+    })
+
+    const file = await fs.contents('tests/bootstrap.ts')
+    assert.snapshot(file).match()
+  })
+})