diff --git a/system/HTTP/CLIRequest.php b/system/HTTP/CLIRequest.php
index ef10d101e05b..2605357f0224 100644
--- a/system/HTTP/CLIRequest.php
+++ b/system/HTTP/CLIRequest.php
@@ -71,6 +71,9 @@ public function __construct(App $config)
         ignore_user_abort(true);
 
         $this->parseCommand();
+
+        // Set SiteURI for this request
+        $this->uri = new SiteURI($config, $this->getPath());
     }
 
     /**
diff --git a/tests/system/Helpers/URLHelper/SiteUrlCliTest.php b/tests/system/Helpers/URLHelper/SiteUrlCliTest.php
new file mode 100644
index 000000000000..c675cd326272
--- /dev/null
+++ b/tests/system/Helpers/URLHelper/SiteUrlCliTest.php
@@ -0,0 +1,333 @@
+<?php
+
+/**
+ * This file is part of CodeIgniter 4 framework.
+ *
+ * (c) CodeIgniter Foundation <admin@codeigniter.com>
+ *
+ * For the full copyright and license information, please view
+ * the LICENSE file that was distributed with this source code.
+ */
+
+namespace CodeIgniter\Helpers\URLHelper;
+
+use CodeIgniter\Config\Factories;
+use CodeIgniter\Config\Services;
+use CodeIgniter\HTTP\CLIRequest;
+use CodeIgniter\Test\CIUnitTestCase;
+use Config\App;
+
+/**
+ * Since base_url() only slightly modifies
+ * site_url() these functions are tested
+ * simultaneously.
+ *
+ * @backupGlobals enabled
+ *
+ * @internal
+ *
+ * @group Others
+ */
+final class SiteUrlCliTest extends CIUnitTestCase
+{
+    private App $config;
+
+    protected function setUp(): void
+    {
+        parent::setUp();
+
+        Services::reset(true);
+
+        $this->config = new App();
+    }
+
+    protected function tearDown(): void
+    {
+        parent::tearDown();
+
+        $_SERVER = [];
+    }
+
+    private function createRequest(?App $config = null): void
+    {
+        $config ??= new App();
+
+        $request = new CLIRequest($config);
+        Services::injectMock('request', $request);
+
+        Factories::injectMock('config', 'App', $config);
+    }
+
+    /**
+     * Takes a multitude of various config input and verifies
+     * that base_url() and site_url() return the expected result.
+     *
+     * @param string      $baseURL
+     * @param string      $indexPage
+     * @param string|null $scheme
+     * @param bool        $secure
+     * @param string      $path
+     * @param string      $expectedSiteUrl
+     * @param string      $expectedBaseUrl
+     *
+     * @dataProvider provideUrls
+     */
+    public function testUrls(
+        $baseURL,
+        $indexPage,
+        $scheme,
+        $secure,
+        $path,
+        $expectedSiteUrl,
+        $expectedBaseUrl
+    ): void {
+        // Set the config
+        $this->config->baseURL                   = $baseURL;
+        $this->config->indexPage                 = $indexPage;
+        $this->config->forceGlobalSecureRequests = $secure;
+
+        $this->createRequest($this->config);
+
+        $this->assertSame($expectedSiteUrl, site_url($path, $scheme, $this->config));
+        $this->assertSame($expectedBaseUrl, base_url($path, $scheme));
+    }
+
+    public static function provideUrls(): iterable
+    {
+        // baseURL, indexPage, scheme, secure, path, expectedSiteUrl, expectedBaseUrl
+        return [
+            'forceGlobalSecure' => [
+                'http://example.com/',
+                'index.php',
+                null,
+                true,
+                '',
+                'https://example.com/index.php',
+                'https://example.com/',
+            ],
+            [
+                'http://example.com/',
+                'index.php',
+                null,
+                false,
+                '',
+                'http://example.com/index.php',
+                'http://example.com/',
+            ],
+            'baseURL missing /' => [
+                'http://example.com',
+                'index.php',
+                null,
+                false,
+                '',
+                'http://example.com/index.php',
+                'http://example.com/',
+            ],
+            [
+                'http://example.com/',
+                '',
+                null,
+                false,
+                '',
+                'http://example.com/',
+                'http://example.com/',
+            ],
+            [
+                'http://example.com/',
+                'banana.php',
+                null,
+                false,
+                '',
+                'http://example.com/banana.php',
+                'http://example.com/',
+            ],
+            [
+                'http://example.com/',
+                '',
+                null,
+                false,
+                'abc',
+                'http://example.com/abc',
+                'http://example.com/abc',
+            ],
+            [
+                'http://example.com/',
+                '',
+                null,
+                false,
+                '/abc',
+                'http://example.com/abc',
+                'http://example.com/abc',
+            ],
+            [
+                'http://example.com/',
+                '',
+                null,
+                false,
+                '/abc/',
+                'http://example.com/abc/',
+                'http://example.com/abc/',
+            ],
+            [
+                'http://example.com/',
+                '',
+                null,
+                false,
+                '/abc/def',
+                'http://example.com/abc/def',
+                'http://example.com/abc/def',
+            ],
+            'URL decode' => [
+                'http://example.com/',
+                '',
+                null,
+                false,
+                'template/meet-%26-greet',
+                'http://example.com/template/meet-&-greet',
+                'http://example.com/template/meet-&-greet',
+            ],
+            'URL encode' => [
+                'http://example.com/',
+                '',
+                null,
+                false,
+                '<s>alert</s>',
+                'http://example.com/%3Cs%3Ealert%3C/s%3E',
+                'http://example.com/%3Cs%3Ealert%3C/s%3E',
+            ],
+            [
+                'http://example.com/public/',
+                'index.php',
+                null,
+                false,
+                '',
+                'http://example.com/public/index.php',
+                'http://example.com/public/',
+            ],
+            [
+                'http://example.com/public/',
+                '',
+                null,
+                false,
+                '',
+                'http://example.com/public/',
+                'http://example.com/public/',
+            ],
+            [
+                'http://example.com/public',
+                '',
+                null,
+                false,
+                '',
+                'http://example.com/public/',
+                'http://example.com/public/',
+            ],
+            [
+                'http://example.com/public',
+                'index.php',
+                null,
+                false,
+                '/',
+                'http://example.com/public/index.php/',
+                'http://example.com/public/',
+            ],
+            [
+                'http://example.com/public/',
+                'index.php',
+                null,
+                false,
+                '/',
+                'http://example.com/public/index.php/',
+                'http://example.com/public/',
+            ],
+            [
+                'http://example.com/',
+                'index.php',
+                null,
+                false,
+                'foo',
+                'http://example.com/index.php/foo',
+                'http://example.com/foo',
+            ],
+            [
+                'http://example.com/',
+                'index.php',
+                null,
+                false,
+                '0',
+                'http://example.com/index.php/0',
+                'http://example.com/0',
+            ],
+            [
+                'http://example.com/public',
+                'index.php',
+                null,
+                false,
+                'foo',
+                'http://example.com/public/index.php/foo',
+                'http://example.com/public/foo',
+            ],
+            [
+                'http://example.com/',
+                'index.php',
+                null,
+                false,
+                'foo?bar=bam',
+                'http://example.com/index.php/foo?bar=bam',
+                'http://example.com/foo?bar=bam',
+            ],
+            [
+                'http://example.com/',
+                'index.php',
+                null,
+                false,
+                'test#banana',
+                'http://example.com/index.php/test#banana',
+                'http://example.com/test#banana',
+            ],
+            [
+                'http://example.com/',
+                'index.php',
+                'ftp',
+                false,
+                'foo',
+                'ftp://example.com/index.php/foo',
+                'ftp://example.com/foo',
+            ],
+            [
+                'http://example.com/',
+                'index.php',
+                null,
+                false,
+                'news/local/123',
+                'http://example.com/index.php/news/local/123',
+                'http://example.com/news/local/123',
+            ],
+            [
+                'http://example.com/',
+                'index.php',
+                null,
+                false,
+                ['news', 'local', '123'],
+                'http://example.com/index.php/news/local/123',
+                'http://example.com/news/local/123',
+            ],
+        ];
+    }
+
+    public function testSiteURLWithEmptyStringScheme(): void
+    {
+        $this->config->baseURL                   = 'http://example.com/';
+        $this->config->indexPage                 = 'index.php';
+        $this->config->forceGlobalSecureRequests = false;
+
+        $this->assertSame(
+            '//example.com/index.php/test',
+            site_url('test', '', $this->config)
+        );
+        $this->assertSame(
+            '//example.com/img/test.jpg',
+            base_url('img/test.jpg', '')
+        );
+    }
+}