diff --git a/tests/privacy_provider_test.php b/tests/privacy_provider_test.php
index 90fa010..b989a47 100644
--- a/tests/privacy_provider_test.php
+++ b/tests/privacy_provider_test.php
@@ -65,7 +65,7 @@ protected static function set_property($obj, $name, $value): void {
      * @param stdClass $obj The object.
      * @param string $name Name of the method.
      */
-    protected static function get_property($obj, $name): ReflectionClass {
+    protected static function get_property($obj, $name): \ReflectionProperty {
         // Ref: http://stackoverflow.com/questions/18558183/phpunit-mockbuilder-set-mock-object-internal-property ish.
         $class = new \ReflectionClass($obj);
         $property = $class->getProperty($name);