diff --git a/administrator/components/com_patchtester/PatchTester/Model/PullModel.php b/administrator/components/com_patchtester/PatchTester/Model/PullModel.php
index 69bcd6f..cfe8645 100644
--- a/administrator/components/com_patchtester/PatchTester/Model/PullModel.php
+++ b/administrator/components/com_patchtester/PatchTester/Model/PullModel.php
@@ -337,6 +337,12 @@ class PullModel extends AbstractModel
 		// Write or create patch chain for correct order of patching
 		$this->appendPatchChain($lastInserted, $id);
 
+		// On Joomla 4 or later, remove the autoloader file
+		if (version_compare(JVERSION, '4', 'ge') && file_exists(JPATH_LIBRARIES . '/autoload_psr4.php'))
+		{
+			File::delete(JPATH_LIBRARIES . '/autoload_psr4.php');
+		}
+
 		// Change the media version
 		$version = new Version;
 		$version->refreshMediaVersion();
@@ -506,6 +512,12 @@ class PullModel extends AbstractModel
 
 		$this->saveAppliedPatch($pull->number, $parsedFiles, $pull->head->sha);
 
+		// On Joomla 4 or later, remove the autoloader file
+		if (version_compare(JVERSION, '4', 'ge') && file_exists(JPATH_LIBRARIES . '/autoload_psr4.php'))
+		{
+			File::delete(JPATH_LIBRARIES . '/autoload_psr4.php');
+		}
+
 		// Change the media version
 		$version = new Version;
 		$version->refreshMediaVersion();
@@ -713,6 +725,12 @@ class PullModel extends AbstractModel
 
 		Folder::delete($backupsPath);
 
+		// On Joomla 4 or later, remove the autoloader file
+		if (version_compare(JVERSION, '4', 'ge') && file_exists(JPATH_LIBRARIES . '/autoload_psr4.php'))
+		{
+			File::delete(JPATH_LIBRARIES . '/autoload_psr4.php');
+		}
+
 		// Change the media version
 		$version = new Version;
 		$version->refreshMediaVersion();
@@ -822,6 +840,12 @@ class PullModel extends AbstractModel
 			}
 		}
 
+		// On Joomla 4 or later, remove the autoloader file
+		if (version_compare(JVERSION, '4', 'ge') && file_exists(JPATH_LIBRARIES . '/autoload_psr4.php'))
+		{
+			File::delete(JPATH_LIBRARIES . '/autoload_psr4.php');
+		}
+
 		// Change the media version
 		$version = new Version;
 		$version->refreshMediaVersion();