diff --git a/lib/getFormatterFunction.js b/lib/getFormatterFunction.js
deleted file mode 100644
index a9f7a8ff0a..0000000000
--- a/lib/getFormatterFunction.js
+++ /dev/null
@@ -1,34 +0,0 @@
-'use strict';
-
-const formatters = require('./formatters');
-const getFormatterOptionsText = require('./utils/getFormatterOptionsText');
-
-/** @typedef {import('stylelint').FormatterIdentifier} FormatterIdentifier */
-/** @typedef {import('stylelint').Formatter} Formatter */
-
-/**
- * @param {FormatterIdentifier | undefined} selected
- * @returns {Formatter}
- */
-function getFormatterFunction(selected) {
-	/** @type {Formatter} */
-	let formatterFunction;
-
-	if (typeof selected === 'string') {
-		formatterFunction = formatters[selected];
-
-		if (formatterFunction === undefined) {
-			throw new Error(
-				`You must use a valid formatter option: ${getFormatterOptionsText()} or a function`,
-			);
-		}
-	} else if (typeof selected === 'function') {
-		formatterFunction = selected;
-	} else {
-		formatterFunction = formatters.json;
-	}
-
-	return formatterFunction;
-}
-
-module.exports = getFormatterFunction;
diff --git a/lib/standalone.js b/lib/standalone.js
index 0df2b59022..6ecc3fd3f7 100644
--- a/lib/standalone.js
+++ b/lib/standalone.js
@@ -6,8 +6,9 @@ const createStylelintResult = require('./createStylelintResult');
 const debug = require('debug')('stylelint:standalone');
 const FileCache = require('./utils/FileCache');
 const filterFilePaths = require('./utils/filterFilePaths');
+const formatters = require('./formatters');
 const fs = require('fs');
-const getFormatterFunction = require('./getFormatterFunction');
+const getFormatterOptionsText = require('./utils/getFormatterOptionsText');
 const globby = require('globby');
 const hash = require('./utils/hash');
 const NoFilesFoundError = require('./utils/noFilesFoundError');
@@ -24,6 +25,7 @@ const writeFileAtomic = require('write-file-atomic');
 /** @typedef {import('stylelint').StylelintStandaloneReturnValue} StylelintStandaloneReturnValue */
 /** @typedef {import('stylelint').StylelintResult} StylelintResult */
 /** @typedef {import('stylelint').Formatter} Formatter */
+/** @typedef {import('stylelint').FormatterIdentifier} FormatterIdentifier */
 
 /**
  * @param {StylelintStandaloneOptions} options
@@ -284,6 +286,31 @@ module.exports = function (options) {
 		});
 };
 
+/**
+ * @param {FormatterIdentifier | undefined} selected
+ * @returns {Formatter}
+ */
+function getFormatterFunction(selected) {
+	/** @type {Formatter} */
+	let formatterFunction;
+
+	if (typeof selected === 'string') {
+		formatterFunction = formatters[selected];
+
+		if (formatterFunction === undefined) {
+			throw new Error(
+				`You must use a valid formatter option: ${getFormatterOptionsText()} or a function`,
+			);
+		}
+	} else if (typeof selected === 'function') {
+		formatterFunction = selected;
+	} else {
+		formatterFunction = formatters.json;
+	}
+
+	return formatterFunction;
+}
+
 /**
  * @param {import('stylelint').StylelintInternalApi} stylelint
  * @param {any} error