diff --git a/system/Database/Exceptions/DatabaseException.php b/system/Database/Exceptions/DatabaseException.php
index a2b3b7637ce7..13f58dc12954 100644
--- a/system/Database/Exceptions/DatabaseException.php
+++ b/system/Database/Exceptions/DatabaseException.php
@@ -20,5 +20,5 @@ class DatabaseException extends Error implements ExceptionInterface
      *
      * @var int
      */
-    protected $code = 8;
+    protected $code = EXIT_DATABASE;
 }
diff --git a/system/Entity/Exceptions/CastException.php b/system/Entity/Exceptions/CastException.php
index 2cda4d72238d..224bbdc7eb68 100644
--- a/system/Entity/Exceptions/CastException.php
+++ b/system/Entity/Exceptions/CastException.php
@@ -15,6 +15,10 @@
 
 /**
  * CastException is thrown for invalid cast initialization and management.
+ *
+ * @TODO CodeIgniter\Exceptions\CastException is deprecated and this class is used.
+ *      CodeIgniter\Exceptions\CastException has the property $code = EXIT_CONFIG,
+ *      but this class does not have the code.
  */
 class CastException extends FrameworkException
 {
diff --git a/system/Exceptions/CastException.php b/system/Exceptions/CastException.php
index 5e41631536c7..06511f73907f 100644
--- a/system/Exceptions/CastException.php
+++ b/system/Exceptions/CastException.php
@@ -23,11 +23,11 @@ class CastException extends CriticalError
     use DebugTraceableTrait;
 
     /**
-     * Error code
+     * Exit status code
      *
      * @var int
      */
-    protected $code = 3;
+    protected $code = EXIT_CONFIG;
 
     public static function forInvalidJsonFormatException(int $error)
     {
diff --git a/system/Exceptions/ConfigException.php b/system/Exceptions/ConfigException.php
index 41ae4959e594..ced8afc6e04f 100644
--- a/system/Exceptions/ConfigException.php
+++ b/system/Exceptions/ConfigException.php
@@ -19,11 +19,11 @@ class ConfigException extends CriticalError
     use DebugTraceableTrait;
 
     /**
-     * Error code
+     * Exit status code
      *
      * @var int
      */
-    protected $code = 3;
+    protected $code = EXIT_CONFIG;
 
     public static function forDisabledMigrations()
     {
diff --git a/system/Exceptions/PageNotFoundException.php b/system/Exceptions/PageNotFoundException.php
index 2a773f1785dc..531df0e48f11 100644
--- a/system/Exceptions/PageNotFoundException.php
+++ b/system/Exceptions/PageNotFoundException.php
@@ -19,7 +19,7 @@ class PageNotFoundException extends OutOfBoundsException implements ExceptionInt
     use DebugTraceableTrait;
 
     /**
-     * Error code
+     * HTTP status code
      *
      * @var int
      */
diff --git a/system/Router/Exceptions/RedirectException.php b/system/Router/Exceptions/RedirectException.php
index b2456f367676..d5a1616b481b 100644
--- a/system/Router/Exceptions/RedirectException.php
+++ b/system/Router/Exceptions/RedirectException.php
@@ -19,7 +19,7 @@
 class RedirectException extends Exception
 {
     /**
-     * Status code for redirects
+     * HTTP status code for redirects
      *
      * @var int
      */
diff --git a/tests/system/Debug/ExceptionsTest.php b/tests/system/Debug/ExceptionsTest.php
index 8bd4f01e0925..3ef643c831e3 100644
--- a/tests/system/Debug/ExceptionsTest.php
+++ b/tests/system/Debug/ExceptionsTest.php
@@ -11,6 +11,9 @@
 
 namespace CodeIgniter\Debug;
 
+use CodeIgniter\Database\Exceptions\DatabaseException;
+use CodeIgniter\Entity\Exceptions\CastException;
+use CodeIgniter\Exceptions\ConfigException;
 use CodeIgniter\Exceptions\PageNotFoundException;
 use CodeIgniter\Test\CIUnitTestCase;
 use CodeIgniter\Test\ReflectionHelper;
@@ -57,9 +60,16 @@ public function testDetermineCodes(): void
     {
         $determineCodes = $this->getPrivateMethodInvoker($this->exception, 'determineCodes');
 
-        $this->assertSame([500, 9], $determineCodes(new RuntimeException('This.')));
-        $this->assertSame([500, 1], $determineCodes(new RuntimeException('That.', 600)));
-        $this->assertSame([404, 1], $determineCodes(new RuntimeException('There.', 404)));
+        $this->assertSame([500, EXIT__AUTO_MIN], $determineCodes(new RuntimeException('This.')));
+        $this->assertSame([500, EXIT_ERROR], $determineCodes(new RuntimeException('That.', 600)));
+        $this->assertSame([404, EXIT_ERROR], $determineCodes(new RuntimeException('There.', 404)));
+        $this->assertSame([167, EXIT_ERROR], $determineCodes(new RuntimeException('This.', 167)));
+        // @TODO This exit code should be EXIT_CONFIG.
+        $this->assertSame([500, 12], $determineCodes(new ConfigException('This.')));
+        // @TODO This exit code should be EXIT_CONFIG.
+        $this->assertSame([500, 9], $determineCodes(new CastException('This.')));
+        // @TODO This exit code should be EXIT_DATABASE.
+        $this->assertSame([500, 17], $determineCodes(new DatabaseException('This.')));
     }
 
     public function testRenderBacktrace(): void