Expand test coverage.

app/Import/Prerequisites/FakePrerequisites.php

@@ -24,6 +24,7 @@ namespace FireflyIII\Import\Prerequisites;
 
 use FireflyIII\User;
 use Illuminate\Support\MessageBag;
+use Log;
 
 /**
  * This class contains all the routines necessary for the fake import provider.
@@ -35,6 +36,16 @@ class FakePrerequisites implements PrerequisitesInterface
     /** @var User The current user */
     private $user;
 
+    /**
+     * FakePrerequisites constructor.
+     */
+    public function __construct()
+    {
+        if ('testing' === config('app.env')) {
+            Log::warning(sprintf('%s should not be instantiated in the TEST environment!', get_class($this)));
+        }
+    }
+
     /**
      * Returns view name that allows user to fill in prerequisites. Currently asks for the API key.
      *