diff --git a/src/wp-includes/class-requests.php b/src/wp-includes/class-requests.php
index e9773800cb..059b8e72c4 100644
--- a/src/wp-includes/class-requests.php
+++ b/src/wp-includes/class-requests.php
@@ -142,8 +142,8 @@ public static function autoloader($class) {
 		}
 
 		$file = str_replace('_', '/', $class);
-		if (file_exists(dirname(__FILE__) . '/' . $file . '.php')) {
-			require_once(dirname(__FILE__) . '/' . $file . '.php');
+		if (file_exists(__DIR__ . '/' . $file . '.php')) {
+			require_once __DIR__ . '/' . $file . '.php';
 		}
 	}
 
@@ -537,7 +537,7 @@ public static function get_certificate_path() {
 			return Requests::$certificate_path;
 		}
 
-		return dirname(__FILE__) . '/Requests/Transport/cacert.pem';
+		return __DIR__ . '/Requests/Transport/cacert.pem';
 	}
 
 	/**
diff --git a/wp-tests-config-sample.php b/wp-tests-config-sample.php
index 7e87d5f6d3..5c978c0aec 100644
--- a/wp-tests-config-sample.php
+++ b/wp-tests-config-sample.php
@@ -2,9 +2,9 @@
 
 /* Path to the WordPress codebase you'd like to test. Add a forward slash in the end. */
 if ( defined( 'WP_RUN_CORE_TESTS' ) && WP_RUN_CORE_TESTS ) {
-	define( 'ABSPATH', dirname( __FILE__ ) . '/build/' );
+	define( 'ABSPATH', __DIR__ . '/build/' );
 } else {
-	define( 'ABSPATH', dirname( __FILE__ ) . '/src/' );
+	define( 'ABSPATH', __DIR__ . '/src/' );
 }
 
 /*