changing parameters for test

test_nodes.ipynb

 {
  "metadata": {
   "name": "",
-  "signature": "sha256:39795cfb8240644899d47842db4ebd890ab901710c6e797039f2500a0222c53f"
+  "signature": "sha256:693c689bf4132eef6fdd01022aabf0dc4d6fd258f9c9f412c3de6d66cc2e8ede"
  },
  "nbformat": 3,
  "nbformat_minor": 0,
@@ -93,7 +93,64 @@
      ],
      "language": "python",
      "metadata": {},
-     "outputs": []
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "User #0\n",
+        "0:01:23.977042"
+       ]
+      },
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "\n",
+        "0:02:52.814926"
+       ]
+      },
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "\n",
+        "0:04:20.082505"
+       ]
+      },
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "\n",
+        "0:05:46.918613"
+       ]
+      },
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "\n",
+        "0:07:14.045494"
+       ]
+      },
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "\n"
+       ]
+      },
+      {
+       "metadata": {},
+       "output_type": "pyout",
+       "prompt_number": 5,
+       "text": [
+        "datetime.timedelta(0, 434, 618664)"
+       ]
+      }
+     ],
+     "prompt_number": 5
     },
     {
      "cell_type": "code",
@@ -103,7 +160,16 @@
      ],
      "language": "python",
      "metadata": {},
-     "outputs": []
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "0:07:14.618664\n"
+       ]
+      }
+     ],
+     "prompt_number": 6
     },
     {
      "cell_type": "code",