diff --git a/system/CodeIgniter.php b/system/CodeIgniter.php
index 02f595e1ab6d..d9777133ba12 100644
--- a/system/CodeIgniter.php
+++ b/system/CodeIgniter.php
@@ -583,9 +583,7 @@ public function setRequest(Request $request)
     }
 
     /**
-     * Get our Request object, (either IncomingRequest or CLIRequest)
-     * and set the server protocol based on the information provided
-     * by the server.
+     * Get our Request object, (either IncomingRequest or CLIRequest).
      */
     protected function getRequestObject()
     {
@@ -594,15 +592,12 @@ protected function getRequestObject()
         }
 
         if ($this->isSparked() || $this->isPhpCli()) {
-            $this->request = Services::clirequest($this->config);
-
-            // Inject the request object into Services::request().
-            Services::inject('request', $this->request);
+            Services::createRequest($this->config, true);
         } else {
-            $this->request = Services::request($this->config);
-            // guess at protocol if needed
-            $this->request->setProtocolVersion($_SERVER['SERVER_PROTOCOL'] ?? 'HTTP/1.1');
+            Services::createRequest($this->config);
         }
+
+        $this->request = Services::request();
     }
 
     /**
diff --git a/system/Config/BaseService.php b/system/Config/BaseService.php
index 259abd27130d..14b9aa718413 100644
--- a/system/Config/BaseService.php
+++ b/system/Config/BaseService.php
@@ -96,6 +96,7 @@
  * @method static CLIRequest clirequest(App $config = null, $getShared = true)
  * @method static CodeIgniter codeigniter(App $config = null, $getShared = true)
  * @method static Commands commands($getShared = true)
+ * @method static void createRequest(App $config, bool $isCli = false)
  * @method static ContentSecurityPolicy csp(CSPConfig $config = null, $getShared = true)
  * @method static CURLRequest curlrequest($options = [], ResponseInterface $response = null, App $config = null, $getShared = true)
  * @method static Email email($config = null, $getShared = true)
@@ -105,6 +106,7 @@
  * @method static Format format(ConfigFormat $config = null, $getShared = true)
  * @method static Honeypot honeypot(ConfigHoneyPot $config = null, $getShared = true)
  * @method static BaseHandler image($handler = null, Images $config = null, $getShared = true)
+ * @method static IncomingRequest incommingrequest(?App $config = null, bool $getShared = true)
  * @method static Iterator iterator($getShared = true)
  * @method static Language language($locale = null, $getShared = true)
  * @method static Logger logger($getShared = true)
@@ -114,7 +116,7 @@
  * @method static Parser parser($viewPath = null, ConfigView $config = null, $getShared = true)
  * @method static RedirectResponse redirectresponse(App $config = null, $getShared = true)
  * @method static View renderer($viewPath = null, ConfigView $config = null, $getShared = true)
- * @method static IncomingRequest request(App $config = null, $getShared = true)
+ * @method static IncomingRequest|CLIRequest request(App $config = null, $getShared = true)
  * @method static Response response(App $config = null, $getShared = true)
  * @method static Router router(RouteCollectionInterface $routes = null, Request $request = null, $getShared = true)
  * @method static RouteCollection routes($getShared = true)
@@ -292,18 +294,6 @@ public static function resetSingle(string $name)
         unset(static::$mocks[$name], static::$instances[$name]);
     }
 
-    /**
-     * Inject object.
-     *
-     * @param object $obj
-     *
-     * @internal
-     */
-    public static function inject(string $name, $obj)
-    {
-        static::$instances[strtolower($name)] = $obj;
-    }
-
     /**
      * Inject mock object for testing.
      *
diff --git a/system/Config/Services.php b/system/Config/Services.php
index 82e089741892..4d1a94547ad4 100644
--- a/system/Config/Services.php
+++ b/system/Config/Services.php
@@ -117,6 +117,8 @@ public static function cache(?Cache $config = null, bool $getShared = true)
      * a command line request.
      *
      * @return CLIRequest
+     *
+     * @internal
      */
     public static function clirequest(?App $config = null, bool $getShared = true)
     {
@@ -470,11 +472,13 @@ public static function renderer(?string $viewPath = null, ?ViewConfig $config =
     }
 
     /**
-     * The Request class models an HTTP request.
+     * Returns the current Request object.
      *
-     * CodeIgniter::getRequestObject() injects CLIRequest if $this->request is CLIRequest.
+     * createRequest() injects IncomingRequest or CLIRequest.
      *
      * @return CLIRequest|IncomingRequest
+     *
+     * @deprecated The parameter $config and $getShared are deprecated.
      */
     public static function request(?App $config = null, bool $getShared = true)
     {
@@ -482,6 +486,45 @@ public static function request(?App $config = null, bool $getShared = true)
             return static::getSharedInstance('request', $config);
         }
 
+        // @TODO remove the following code for backward compatibility
+        return static::incommingrequest($config, $getShared);
+    }
+
+    /**
+     * Create the current Request object, either IncomingRequest or CLIRequest.
+     *
+     * This method is called from CodeIgniter::getRequestObject().
+     *
+     * @internal
+     */
+    public static function createRequest(App $config, bool $isCli = false): void
+    {
+        if ($isCli) {
+            $request = AppServices::clirequest($config);
+        } else {
+            $request = AppServices::incommingrequest($config);
+
+            // guess at protocol if needed
+            $request->setProtocolVersion($_SERVER['SERVER_PROTOCOL'] ?? 'HTTP/1.1');
+        }
+
+        // Inject the request object into Services::request().
+        static::$instances['request'] = $request;
+    }
+
+    /**
+     * The IncomingRequest class models an HTTP request.
+     *
+     * @return IncomingRequest
+     *
+     * @internal
+     */
+    public static function incommingrequest(?App $config = null, bool $getShared = true)
+    {
+        if ($getShared) {
+            return static::getSharedInstance('request', $config);
+        }
+
         $config ??= config('App');
 
         return new IncomingRequest(
diff --git a/tests/system/CommonSingleServiceTest.php b/tests/system/CommonSingleServiceTest.php
index 6fefba152b56..7d078a6f9a2e 100644
--- a/tests/system/CommonSingleServiceTest.php
+++ b/tests/system/CommonSingleServiceTest.php
@@ -98,7 +98,6 @@ public static function serviceNamesProvider(): iterable
             'serviceExists',
             'reset',
             'resetSingle',
-            'inject',
             'injectMock',
             'encrypter', // Encrypter needs a starter key
             'session', // Headers already sent