diff --git a/composer.json b/composer.json
index 2ed7ba215..5d24acd8d 100644
--- a/composer.json
+++ b/composer.json
@@ -68,7 +68,7 @@
   },
   "autoload-dev": {
     "psr-4": {
-      "WordPress\\Plugin_Check\\Test_Data\\": "tests/phpunit/testdata",
+      "WordPress\\Plugin_Check\\Test_Data\\": "tests/phpunit/testdata/Checks",
       "WordPress\\Plugin_Check\\Test_Utils\\": "tests/phpunit/utils",
       "WordPress\\Plugin_Check\\Behat_Utils\\": "tests/behat/includes"
     }
diff --git a/tests/phpunit/tests/Checker/AJAX_Runner_Tests.php b/tests/phpunit/tests/Checker/AJAX_Runner_Tests.php
index d60781fab..a8c530ffa 100644
--- a/tests/phpunit/tests/Checker/AJAX_Runner_Tests.php
+++ b/tests/phpunit/tests/Checker/AJAX_Runner_Tests.php
@@ -84,7 +84,7 @@ function ( $checks ) {
 
 		$this->assertIsCallable( $cleanup );
 
-		// Assert the Universal_Runtume_Preparation was run.
+		// Assert the Universal_Runtime_Preparation was run.
 		$this->assertTrue( has_filter( 'option_active_plugins' ) );
 		$this->assertTrue( has_filter( 'default_option_active_plugins' ) );
 		$this->assertTrue( has_filter( 'stylesheet' ) );
diff --git a/tests/phpunit/utils/Traits/With_Mock_Filesystem.php b/tests/phpunit/utils/Traits/With_Mock_Filesystem.php
index 602657bc3..f4b338bfe 100644
--- a/tests/phpunit/utils/Traits/With_Mock_Filesystem.php
+++ b/tests/phpunit/utils/Traits/With_Mock_Filesystem.php
@@ -32,7 +32,7 @@ function () {
 		WP_Filesystem();
 
 		// Simulate that the original object-cache.copy.php file exists.
-		$wp_filesystem->put_contents( WP_PLUGIN_CHECK_PLUGIN_DIR_PATH . 'drop-ins/object-cache.copy.php', file_get_contents( WP_PLUGIN_CHECK_PLUGIN_DIR_PATH . 'drop-ins/object-cache.copy.php' ) );
+		$wp_filesystem->put_contents( TESTS_PLUGIN_DIR . '/drop-ins/object-cache.copy.php', file_get_contents( TESTS_PLUGIN_DIR . '/drop-ins/object-cache.copy.php' ) );
 	}
 
 	/**
@@ -59,6 +59,6 @@ function () {
 		WP_Filesystem();
 
 		// Simulate that the original object-cache.copy.php file exists.
-		$wp_filesystem->put_contents( WP_PLUGIN_CHECK_PLUGIN_DIR_PATH . 'drop-ins/object-cache.copy.php', file_get_contents( WP_PLUGIN_CHECK_PLUGIN_DIR_PATH . 'drop-ins/object-cache.copy.php' ) );
+		$wp_filesystem->put_contents( TESTS_PLUGIN_DIR . '/drop-ins/object-cache.copy.php', file_get_contents( TESTS_PLUGIN_DIR . '/drop-ins/object-cache.copy.php' ) );
 	}
 }