diff --git a/core/lib/Drupal/Core/Extension/Exception/UninstalledExtensionException.php b/core/lib/Drupal/Core/Extension/Exception/UninstalledExtensionException.php
index 5588a12..f0503f1 100644
--- a/core/lib/Drupal/Core/Extension/Exception/UninstalledExtensionException.php
+++ b/core/lib/Drupal/Core/Extension/Exception/UninstalledExtensionException.php
@@ -5,4 +5,4 @@
 /**
  * Exception class thrown when a specified extension has not been installed.
  */
-class UninstalledExtensionException extends \RuntimeException {}
+class UninstalledExtensionException extends \InvalidArgumentException {}
diff --git a/core/lib/Drupal/Core/Extension/Exception/UnknownExtensionException.php b/core/lib/Drupal/Core/Extension/Exception/UnknownExtensionException.php
index b049cc6..790285f 100644
--- a/core/lib/Drupal/Core/Extension/Exception/UnknownExtensionException.php
+++ b/core/lib/Drupal/Core/Extension/Exception/UnknownExtensionException.php
@@ -5,4 +5,4 @@
 /**
  * Exception class thrown when a specified extension is not on the filesystem.
  */
-class UnknownExtensionException extends \RuntimeException {}
+class UnknownExtensionException extends \InvalidArgumentException {}