diff --git a/composer.json b/composer.json
index bfd95859c..dd5333aea 100644
--- a/composer.json
+++ b/composer.json
@@ -38,6 +38,7 @@
         "symfony/polyfill-intl-grapheme": "self.version",
         "symfony/polyfill-intl-icu": "self.version",
         "symfony/polyfill-intl-messageformatter": "self.version",
+        "symfony/polyfill-intl-listformatter": "self.version",
         "symfony/polyfill-intl-idn": "self.version",
         "symfony/polyfill-intl-normalizer": "self.version",
         "symfony/polyfill-mbstring": "self.version",
@@ -62,6 +63,7 @@
         "classmap": [
             "src/Intl/Icu/Resources/stubs",
             "src/Intl/MessageFormatter/Resources/stubs",
+            "src/Intl/ListFormatter/Resources/stubs",
             "src/Intl/Normalizer/Resources/stubs",
             "src/Php85/Resources/stubs",
             "src/Php84/Resources/stubs",
diff --git a/src/Intl/ListFormatter/IntlListFormatter.php b/src/Intl/ListFormatter/IntlListFormatter.php
new file mode 100644
index 000000000..107c76f34
--- /dev/null
+++ b/src/Intl/ListFormatter/IntlListFormatter.php
@@ -0,0 +1,206 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Polyfill\Intl\ListFormatter;
+
+/**
+ * A polyfill implementation of the IntlListFormatter class provided by the intl extension.
+ *
+ * @author Ayesh Karunaratne <ayesh@aye.sh>
+ *
+ * @internal
+ */
+class IntlListFormatter
+{
+    public const TYPE_AND = 0;
+    public const TYPE_OR = 1;
+    public const TYPE_UNITS = 2;
+
+    public const WIDTH_WIDE = 0;
+    public const WIDTH_SHORT = 1;
+    public const WIDTH_NARROW = 2;
+
+    /**
+     * @var string
+     */
+    private $locale;
+    /**
+     * @var int
+     */
+    private $type;
+    /**
+     * @var int
+     */
+    private $width;
+
+    protected static $listPatterns = [
+        'en' => [
+            'listPattern-type-standard' => [
+                'start' => '{0}, {1}',
+                'middle' => '{0}, {1}',
+                'end' => '{0}, and {1}',
+                2 => '{0} and {1}',
+            ],
+            'listPattern-type-or' => [
+                'start' => '{0}, {1}',
+                'middle' => '{0}, {1}',
+                'end' => '{0}, or {1}',
+                2 => '{0} or {1}',
+            ],
+            'listPattern-type-or-narrow' => [
+                'start' => '{0}, {1}',
+                'middle' => '{0}, {1}',
+                'end' => '{0}, or {1}',
+                2 => '{0} or {1}',
+            ],
+            'listPattern-type-or-short' => [
+                'start' => '{0}, {1}',
+                'middle' => '{0}, {1}',
+                'end' => '{0}, or {1}',
+                2 => '{0} or {1}',
+            ],
+            'listPattern-type-standard-narrow' => [
+                'start' => '{0}, {1}',
+                'middle' => '{0}, {1}',
+                'end' => '{0}, {1}',
+                2 => '{0}, {1}',
+            ],
+            'listPattern-type-standard-short' => [
+                'start' => '{0}, {1}',
+                'middle' => '{0}, {1}',
+                'end' => '{0}, & {1}',
+                2 => '{0} & {1}',
+            ],
+            'listPattern-type-unit' => [
+                'start' => '{0}, {1}',
+                'middle' => '{0}, {1}',
+                'end' => '{0}, {1}',
+                2 => '{0}, {1}',
+            ],
+            'listPattern-type-unit-narrow' => [
+                'start' => '{0} {1}',
+                'middle' => '{0} {1}',
+                'end' => '{0} {1}',
+                2 => '{0} {1}',
+            ],
+            'listPattern-type-unit-short' => [
+                'start' => '{0}, {1}',
+                'middle' => '{0}, {1}',
+                'end' => '{0}, {1}',
+                2 => '{0}, {1}',
+            ],
+        ],
+    ];
+
+    public function __construct(
+        string $locale,
+        int $type = self::TYPE_AND,
+        int $width = self::WIDTH_WIDE
+    ) {
+        $exceptionClass = PHP_VERSION_ID >= 80000 ? \ValueError::class : \InvalidArgumentException::class;
+        if ($locale !== 'en' && strpos($locale, 'en') !== 0) {
+            throw new $exceptionClass('Invalid locale, only "en" and "en-*" locales are supported');
+        }
+
+        if ($type !== self::TYPE_AND && $type !== self::TYPE_OR && $type !== self::TYPE_UNITS) {
+            throw new $exceptionClass('Argument #2 ($type) must be one of IntlListFormatter::TYPE_AND, IntlListFormatter::TYPE_OR, or IntlListFormatter::TYPE_UNITS.');
+        }
+
+        if ($width !== self::WIDTH_WIDE && $width !== self::WIDTH_SHORT && $width !== self::WIDTH_NARROW) {
+            throw new $exceptionClass('Argument #3 ($width) must be one of IntlListFormatter::WIDTH_WIDE, IntlListFormatter::WIDTH_SHORT, or IntlListFormatter::WIDTH_NARROW.');
+        }
+
+
+        $this->locale = 'en';
+        $this->type = $type;
+        $this->width = $width;
+    }
+
+    public function format(array $strings): string
+    {
+        $itemCount = count($strings);
+
+        if ($itemCount === 0) {
+            return '';
+        }
+
+        $strings = array_values($strings);
+
+        if ($itemCount === 1) {
+            return (string) $strings[0];
+        }
+
+        $pattern = $this->getListPattern();
+
+        switch ($this->type) {
+            case self::TYPE_AND:
+                $lookupKeyType = 'standard';
+                break;
+            case self::TYPE_OR:
+                $lookupKeyType = 'or';
+                break;
+            case self::TYPE_UNITS:
+                $lookupKeyType = 'unit';
+                break;
+        }
+
+        switch ($this->width) {
+            case self::WIDTH_WIDE:
+                $lookupKeyWidth = '';
+                break;
+            case self::WIDTH_SHORT:
+                $lookupKeyWidth = '-short';
+                break;
+            case self::WIDTH_NARROW:
+                $lookupKeyWidth = '-narrow';
+                break;
+        }
+
+        $pattern = $pattern['listPattern-type-' . $lookupKeyType . $lookupKeyWidth];
+
+        if ($itemCount === 2) {
+            return strtr($pattern[2], ['{0}' => (string) $strings[0], '{1}' => (string) $strings[1]]);
+        }
+
+        if ($itemCount === 3) {
+            $start = strtr($pattern['start'], ['{0}' => (string) $strings[0], '{1}' => (string) $strings[1]]);
+            return strtr($pattern['end'], ['{0}' => $start, '{1}' => (string) $strings[2]]);
+        }
+
+        $result = strtr($pattern['start'], ['{0}' => (string) $strings[0], '{1}' => (string) $strings[1]]);
+
+        for ($i = 2; $i < $itemCount - 1; $i++) {
+            $result = strtr($pattern["middle"], [
+                "{0}" => $result,
+                "{1}" => $strings[$i],
+            ]);
+        }
+
+        return strtr($pattern["end"], [
+            "{0}" => $result,
+            "{1}" => $strings[$itemCount - 1],
+        ]);
+    }
+
+    protected function getListPattern(): array {
+        return self::$listPatterns[$this->locale];
+    }
+
+    public function getErrorCode()
+    {
+        return 0;
+    }
+
+    public function getErrorMessage()
+    {
+        return '';
+    }
+}
diff --git a/src/Intl/ListFormatter/LICENSE b/src/Intl/ListFormatter/LICENSE
new file mode 100644
index 000000000..7536caeae
--- /dev/null
+++ b/src/Intl/ListFormatter/LICENSE
@@ -0,0 +1,19 @@
+Copyright (c) 2018-present Fabien Potencier
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is furnished
+to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
diff --git a/src/Intl/ListFormatter/README.md b/src/Intl/ListFormatter/README.md
new file mode 100644
index 000000000..b00533c7e
--- /dev/null
+++ b/src/Intl/ListFormatter/README.md
@@ -0,0 +1,14 @@
+Symfony Polyfill / Intl: ListFormatter
+=========================================
+
+This component provides a fallback implementation for the
+[`ListFormatter`](https://php.net/ListFormatter) class provided
+by the [Intl](https://php.net/intl) extension.
+
+More information can be found in the
+[main Polyfill README](https://github.com/symfony/polyfill/blob/main/README.md).
+
+License
+=======
+
+This library is released under the [MIT license](LICENSE).
diff --git a/src/Intl/ListFormatter/Resources/stubs/IntlException.php b/src/Intl/ListFormatter/Resources/stubs/IntlException.php
new file mode 100644
index 000000000..1ac6c2948
--- /dev/null
+++ b/src/Intl/ListFormatter/Resources/stubs/IntlException.php
@@ -0,0 +1,14 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+class IntlException extends Exception
+{
+}
diff --git a/src/Intl/ListFormatter/Resources/stubs/IntlListFormatter.php b/src/Intl/ListFormatter/Resources/stubs/IntlListFormatter.php
new file mode 100644
index 000000000..c9f8fc328
--- /dev/null
+++ b/src/Intl/ListFormatter/Resources/stubs/IntlListFormatter.php
@@ -0,0 +1,14 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+final class IntlListFormatter extends Symfony\Polyfill\Intl\ListFormatter\IntlListFormatter
+{
+}
diff --git a/src/Intl/ListFormatter/composer.json b/src/Intl/ListFormatter/composer.json
new file mode 100644
index 000000000..6d21e36dc
--- /dev/null
+++ b/src/Intl/ListFormatter/composer.json
@@ -0,0 +1,35 @@
+{
+    "name": "symfony/polyfill-intl-listformatter",
+    "type": "library",
+    "description": "Symfony polyfill for intl's ListFormatter class and related functions",
+    "keywords": ["polyfill", "shim", "compatibility", "portable", "intl", "listformatter"],
+    "homepage": "https://symfony.com",
+    "license": "MIT",
+    "authors": [
+        {
+            "name": "Nicolas Grekas",
+            "email": "p@tchwork.com"
+        },
+        {
+            "name": "Symfony Community",
+            "homepage": "https://symfony.com/contributors"
+        }
+    ],
+    "require": {
+        "php": ">=7.2"
+    },
+    "autoload": {
+        "psr-4": { "Symfony\\Polyfill\\Intl\\ListFormatter\\": "" },
+        "classmap": [ "Resources/stubs" ]
+    },
+    "suggest": {
+        "ext-intl": "For best performance"
+    },
+    "minimum-stability": "dev",
+    "extra": {
+        "thanks": {
+            "name": "symfony/polyfill",
+            "url": "https://github.com/symfony/polyfill"
+        }
+    }
+}
diff --git a/tests/Intl/IntlListFormatter/IntlListFormatterTest.php b/tests/Intl/IntlListFormatter/IntlListFormatterTest.php
new file mode 100644
index 000000000..1c95d0969
--- /dev/null
+++ b/tests/Intl/IntlListFormatter/IntlListFormatterTest.php
@@ -0,0 +1,156 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Polyfill\Tests\Intl\ListFormatter;
+
+use IntlListFormatter;
+use PHPUnit\Framework\TestCase;
+
+/**
+ * @author Ayesh Karunaratne <ayesh@aye.sh>
+ *
+ * @group class-polyfill
+ */
+class IntlListFormatterTest extends TestCase
+{
+    public function testUnsupportedLocales()
+    {
+        new IntlListFormatter('en');
+        new IntlListFormatter('en-US');
+        new IntlListFormatter('en_US');
+        new IntlListFormatter('en-LK');
+
+        if (PHP_VERSION_ID >= 80000) {
+            $this->expectException(\ValueError::class);
+        }
+        else {
+            $this->expectException(\InvalidArgumentException::class);
+        }
+
+        new IntlListFormatter('ja');
+    }
+
+    public function testUnsupportedType()
+    {
+        if (PHP_VERSION_ID >= 80000) {
+            $this->expectException(\ValueError::class);
+        }
+        else {
+            $this->expectException(\InvalidArgumentException::class);
+        }
+        $this->expectExceptionMessage('must be one of IntlListFormatter::TYPE_AND, IntlListFormatter::TYPE_OR, or IntlListFormatter::TYPE_UNITS');
+        new IntlListFormatter('en', 42);
+    }
+
+    public function testUnsupportedWidth()
+    {
+        if (PHP_VERSION_ID >= 80000) {
+            $this->expectException(\ValueError::class);
+        }
+        else {
+            $this->expectException(\InvalidArgumentException::class);
+        }
+        $this->expectExceptionMessage('must be one of IntlListFormatter::WIDTH_WIDE, IntlListFormatter::WIDTH_SHORT, or IntlListFormatter::WIDTH_NARROW');
+        new IntlListFormatter('en', IntlListFormatter::TYPE_AND, 42);
+    }
+
+    /**
+     * @dataProvider formattingLists
+     */
+    public function testFormatting(int $type, int $wide, array $strings, string $expected)
+    {
+        $formatter = new IntlListFormatter('en', $type, $wide);
+        self::assertSame($expected, $formatter->format($strings));
+    }
+
+    public function formattingLists() {
+        yield [IntlListFormatter::TYPE_AND, IntlListFormatter::WIDTH_WIDE, [], ''];
+        yield [IntlListFormatter::TYPE_AND, IntlListFormatter::WIDTH_WIDE, [1], '1'];
+        yield [IntlListFormatter::TYPE_AND, IntlListFormatter::WIDTH_WIDE, ['1'], '1'];
+        yield [IntlListFormatter::TYPE_AND, IntlListFormatter::WIDTH_WIDE, ['apple'], 'apple'];
+        yield [IntlListFormatter::TYPE_AND, IntlListFormatter::WIDTH_WIDE, ['apple'], 'apple'];
+        yield [IntlListFormatter::TYPE_AND, IntlListFormatter::WIDTH_WIDE, ['apple', 'banana', 'strawberry'], 'apple, banana, and strawberry'];
+        yield [IntlListFormatter::TYPE_AND, IntlListFormatter::WIDTH_WIDE, ['apple', 'banana', 'strawberry', 'orange'], 'apple, banana, strawberry, and orange'];
+        yield [IntlListFormatter::TYPE_AND, IntlListFormatter::WIDTH_WIDE, ['apple', 'banana', 'strawberry', 'orange', 16], 'apple, banana, strawberry, orange, and 16'];
+
+        yield [IntlListFormatter::TYPE_AND, IntlListFormatter::WIDTH_SHORT, [], ''];
+        yield [IntlListFormatter::TYPE_AND, IntlListFormatter::WIDTH_SHORT, [1], '1'];
+        yield [IntlListFormatter::TYPE_AND, IntlListFormatter::WIDTH_SHORT, ['1'], '1'];
+        yield [IntlListFormatter::TYPE_AND, IntlListFormatter::WIDTH_SHORT, ['apple'], 'apple'];
+        yield [IntlListFormatter::TYPE_AND, IntlListFormatter::WIDTH_SHORT, ['apple'], 'apple'];
+        yield [IntlListFormatter::TYPE_AND, IntlListFormatter::WIDTH_SHORT, ['apple', 'banana', 'strawberry'], 'apple, banana, & strawberry'];
+        yield [IntlListFormatter::TYPE_AND, IntlListFormatter::WIDTH_SHORT, ['apple', 'banana', 'strawberry', 'orange'], 'apple, banana, strawberry, & orange'];
+        yield [IntlListFormatter::TYPE_AND, IntlListFormatter::WIDTH_SHORT, ['apple', 'banana', 'strawberry', 'orange', 16], 'apple, banana, strawberry, orange, & 16'];
+
+        yield [IntlListFormatter::TYPE_AND, IntlListFormatter::WIDTH_NARROW, [], ''];
+        yield [IntlListFormatter::TYPE_AND, IntlListFormatter::WIDTH_NARROW, [1], '1'];
+        yield [IntlListFormatter::TYPE_AND, IntlListFormatter::WIDTH_NARROW, ['1'], '1'];
+        yield [IntlListFormatter::TYPE_AND, IntlListFormatter::WIDTH_NARROW, ['apple'], 'apple'];
+        yield [IntlListFormatter::TYPE_AND, IntlListFormatter::WIDTH_NARROW, ['apple'], 'apple'];
+        yield [IntlListFormatter::TYPE_AND, IntlListFormatter::WIDTH_NARROW, ['apple', 'banana', 'strawberry'], 'apple, banana, strawberry'];
+        yield [IntlListFormatter::TYPE_AND, IntlListFormatter::WIDTH_NARROW, ['apple', 'banana', 'strawberry', 'orange'], 'apple, banana, strawberry, orange'];
+        yield [IntlListFormatter::TYPE_AND, IntlListFormatter::WIDTH_NARROW, ['apple', 'banana', 'strawberry', 'orange', 16], 'apple, banana, strawberry, orange, 16'];
+
+        yield [IntlListFormatter::TYPE_OR, IntlListFormatter::WIDTH_WIDE, [], ''];
+        yield [IntlListFormatter::TYPE_OR, IntlListFormatter::WIDTH_WIDE, [1], '1'];
+        yield [IntlListFormatter::TYPE_OR, IntlListFormatter::WIDTH_WIDE, ['1'], '1'];
+        yield [IntlListFormatter::TYPE_OR, IntlListFormatter::WIDTH_WIDE, ['apple'], 'apple'];
+        yield [IntlListFormatter::TYPE_OR, IntlListFormatter::WIDTH_WIDE, ['apple'], 'apple'];
+        yield [IntlListFormatter::TYPE_OR, IntlListFormatter::WIDTH_WIDE, ['apple', 'banana', 'strawberry'], 'apple, banana, or strawberry'];
+        yield [IntlListFormatter::TYPE_OR, IntlListFormatter::WIDTH_WIDE, ['apple', 'banana', 'strawberry', 'orange'], 'apple, banana, strawberry, or orange'];
+        yield [IntlListFormatter::TYPE_OR, IntlListFormatter::WIDTH_WIDE, ['apple', 'banana', 'strawberry', 'orange', 16], 'apple, banana, strawberry, orange, or 16'];
+
+        yield [IntlListFormatter::TYPE_OR, IntlListFormatter::WIDTH_SHORT, [], ''];
+        yield [IntlListFormatter::TYPE_OR, IntlListFormatter::WIDTH_SHORT, [1], '1'];
+        yield [IntlListFormatter::TYPE_OR, IntlListFormatter::WIDTH_SHORT, ['1'], '1'];
+        yield [IntlListFormatter::TYPE_OR, IntlListFormatter::WIDTH_SHORT, ['apple'], 'apple'];
+        yield [IntlListFormatter::TYPE_OR, IntlListFormatter::WIDTH_SHORT, ['apple'], 'apple'];
+        yield [IntlListFormatter::TYPE_OR, IntlListFormatter::WIDTH_SHORT, ['apple', 'banana', 'strawberry'], 'apple, banana, or strawberry'];
+        yield [IntlListFormatter::TYPE_OR, IntlListFormatter::WIDTH_SHORT, ['apple', 'banana', 'strawberry', 'orange'], 'apple, banana, strawberry, or orange'];
+        yield [IntlListFormatter::TYPE_OR, IntlListFormatter::WIDTH_SHORT, ['apple', 'banana', 'strawberry', 'orange', 16], 'apple, banana, strawberry, orange, or 16'];
+
+        yield [IntlListFormatter::TYPE_OR, IntlListFormatter::WIDTH_NARROW, [], ''];
+        yield [IntlListFormatter::TYPE_OR, IntlListFormatter::WIDTH_NARROW, [1], '1'];
+        yield [IntlListFormatter::TYPE_OR, IntlListFormatter::WIDTH_NARROW, ['1'], '1'];
+        yield [IntlListFormatter::TYPE_OR, IntlListFormatter::WIDTH_NARROW, ['apple'], 'apple'];
+        yield [IntlListFormatter::TYPE_OR, IntlListFormatter::WIDTH_NARROW, ['apple'], 'apple'];
+        yield [IntlListFormatter::TYPE_OR, IntlListFormatter::WIDTH_NARROW, ['apple', 'banana', 'strawberry', 'orange'], 'apple, banana, strawberry, or orange'];
+        yield [IntlListFormatter::TYPE_OR, IntlListFormatter::WIDTH_NARROW, ['apple', 'banana', 'strawberry', 'orange', 16], 'apple, banana, strawberry, orange, or 16'];
+
+        yield [IntlListFormatter::TYPE_UNITS, IntlListFormatter::WIDTH_WIDE, [], ''];
+        yield [IntlListFormatter::TYPE_UNITS, IntlListFormatter::WIDTH_WIDE, [1], '1'];
+        yield [IntlListFormatter::TYPE_UNITS, IntlListFormatter::WIDTH_WIDE, ['1'], '1'];
+        yield [IntlListFormatter::TYPE_UNITS, IntlListFormatter::WIDTH_WIDE, ['apple'], 'apple'];
+        yield [IntlListFormatter::TYPE_UNITS, IntlListFormatter::WIDTH_WIDE, ['apple'], 'apple'];
+        yield [IntlListFormatter::TYPE_UNITS, IntlListFormatter::WIDTH_WIDE, ['apple', 'banana', 'strawberry'], 'apple, banana, strawberry'];
+        yield [IntlListFormatter::TYPE_UNITS, IntlListFormatter::WIDTH_WIDE, ['apple', 'banana', 'strawberry', 'orange'], 'apple, banana, strawberry, orange'];
+        yield [IntlListFormatter::TYPE_UNITS, IntlListFormatter::WIDTH_WIDE, ['apple', 'banana', 'strawberry', 'orange', 16], 'apple, banana, strawberry, orange, 16'];
+
+
+        yield [IntlListFormatter::TYPE_UNITS, IntlListFormatter::WIDTH_SHORT, [], ''];
+        yield [IntlListFormatter::TYPE_UNITS, IntlListFormatter::WIDTH_SHORT, [1], '1'];
+        yield [IntlListFormatter::TYPE_UNITS, IntlListFormatter::WIDTH_SHORT, ['1'], '1'];
+        yield [IntlListFormatter::TYPE_UNITS, IntlListFormatter::WIDTH_SHORT, ['apple'], 'apple'];
+        yield [IntlListFormatter::TYPE_UNITS, IntlListFormatter::WIDTH_SHORT, ['apple'], 'apple'];
+        yield [IntlListFormatter::TYPE_UNITS, IntlListFormatter::WIDTH_SHORT, ['apple', 'banana', 'strawberry'], 'apple, banana, strawberry'];
+        yield [IntlListFormatter::TYPE_UNITS, IntlListFormatter::WIDTH_SHORT, ['apple', 'banana', 'strawberry', 'orange'], 'apple, banana, strawberry, orange'];
+        yield [IntlListFormatter::TYPE_UNITS, IntlListFormatter::WIDTH_SHORT, ['apple', 'banana', 'strawberry', 'orange', 16], 'apple, banana, strawberry, orange, 16'];
+
+        yield [IntlListFormatter::TYPE_UNITS, IntlListFormatter::WIDTH_NARROW, [], ''];
+        yield [IntlListFormatter::TYPE_UNITS, IntlListFormatter::WIDTH_NARROW, [1], '1'];
+        yield [IntlListFormatter::TYPE_UNITS, IntlListFormatter::WIDTH_NARROW, ['1'], '1'];
+        yield [IntlListFormatter::TYPE_UNITS, IntlListFormatter::WIDTH_NARROW, ['apple'], 'apple'];
+        yield [IntlListFormatter::TYPE_UNITS, IntlListFormatter::WIDTH_NARROW, ['apple'], 'apple'];
+        yield [IntlListFormatter::TYPE_UNITS, IntlListFormatter::WIDTH_NARROW, ['apple', 'banana', 'strawberry'], 'apple banana strawberry'];
+        yield [IntlListFormatter::TYPE_UNITS, IntlListFormatter::WIDTH_NARROW, ['apple', 'banana', 'strawberry', 'orange'], 'apple banana strawberry orange'];
+        yield [IntlListFormatter::TYPE_UNITS, IntlListFormatter::WIDTH_NARROW, ['apple', 'banana', 'strawberry', 'orange', 16], 'apple banana strawberry orange 16'];
+    }
+}