GH-791 Fix failing behat test

Author: davidszkiba

classes/teststrategy/strategy.php

@@ -200,8 +200,7 @@ public function return_next_testitem(array $context) {
             $middlewares[] = $this->scoremodifiers[$modifier];
         }
 
-        $result = wb_middleware_runner::run($middlewares, $context);
-        $this->progress = $context['progress'];
+        $result = wb_middleware_runner::run($middlewares, $this->context);
         $this->progress->save();
 
         $this->update_attemptfeedback($context);