diff --git a/tutorials/2. Adding an Environment.ipynb b/tutorials/2. Adding an Environment.ipynb
index 461f035..35c321d 100644
--- a/tutorials/2. Adding an Environment.ipynb	
+++ b/tutorials/2. Adding an Environment.ipynb	
@@ -189,7 +189,7 @@
     "    def __init__(self):\n",
     "        super().__init__()\n",
     "        self.default_input_filter = NoInputFilter()\n",
-    "        self.default_output_filter = NoInputFilter()\n",
+    "        self.default_output_filter = NoOutputFilter()\n",
     "\n",
     "    @property\n",
     "    def path(self):\n",