diff --git a/tests/python/ltsmin.ipynb b/tests/python/ltsmin.ipynb
index a4b291568..a149b8134 100644
--- a/tests/python/ltsmin.ipynb
+++ b/tests/python/ltsmin.ipynb
@@ -1,7 +1,23 @@
 {
  "metadata": {
-  "name": "",
-  "signature": "sha256:fa0fbee36e16c4615d30141ace5f7aa76009d478e4a4e2b088b6093b25f8bc69"
+  "kernelspec": {
+   "display_name": "Python 3",
+   "language": "python",
+   "name": "python3"
+  },
+  "language_info": {
+   "codemirror_mode": {
+    "name": "ipython",
+    "version": 3
+   },
+   "file_extension": ".py",
+   "mimetype": "text/x-python",
+   "name": "python",
+   "nbconvert_exporter": "python",
+   "pygments_lexer": "ipython3",
+   "version": "3.4.3+"
+  },
+  "name": ""
  },
  "nbformat": 3,
  "nbformat_minor": 0,
@@ -62,6 +78,17 @@
       "Write an example DiVinE model. "
      ]
     },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "!rm -f test1.dve"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [],
+     "prompt_number": 3
+    },
     {
      "cell_type": "code",
      "collapsed": false,
@@ -95,11 +122,11 @@
        "output_type": "stream",
        "stream": "stdout",
        "text": [
-        "Overwriting test1.dve\n"
+        "Writing test1.dve\n"
        ]
       }
      ],
-     "prompt_number": 3
+     "prompt_number": 4
     },
     {
      "cell_type": "markdown",
@@ -123,7 +150,7 @@
       {
        "metadata": {},
        "output_type": "pyout",
-       "prompt_number": 4,
+       "prompt_number": 5,
        "text": [
         "ltsmin model with the following variables:\n",
         "  a: int\n",
@@ -133,7 +160,7 @@
        ]
       }
      ],
-     "prompt_number": 4
+     "prompt_number": 5
     },
     {
      "cell_type": "code",
@@ -147,7 +174,7 @@
       {
        "metadata": {},
        "output_type": "pyout",
-       "prompt_number": 5,
+       "prompt_number": 6,
        "text": [
         "[('state_size', 4),\n",
         " ('types', [('int', []), ('P', ['x']), ('Q', ['wait', 'work'])]),\n",
@@ -155,7 +182,7 @@
        ]
       }
      ],
-     "prompt_number": 5
+     "prompt_number": 6
     },
     {
      "cell_type": "code",
@@ -170,7 +197,7 @@
       {
        "metadata": {},
        "output_type": "pyout",
-       "prompt_number": 6,
+       "prompt_number": 7,
        "svg": [
         "<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"no\"?>\n",
         "<!DOCTYPE svg PUBLIC \"-//W3C//DTD SVG 1.1//EN\"\n",
@@ -358,11 +385,11 @@
         "</svg>\n"
        ],
        "text": [
-        "<spot.impl.kripke; proxy of <Swig Object of type 'std::shared_ptr< spot::kripke > *' at 0x7f6211db0600> >"
+        "<spot.impl.kripke; proxy of <Swig Object of type 'std::shared_ptr< spot::kripke > *' at 0x7f426c309690> >"
        ]
       }
      ],
-     "prompt_number": 6
+     "prompt_number": 7
     },
     {
      "cell_type": "code",
@@ -376,7 +403,7 @@
       {
        "metadata": {},
        "output_type": "pyout",
-       "prompt_number": 7,
+       "prompt_number": 8,
        "svg": [
         "<svg height=\"200pt\" viewBox=\"0.00 0.00 734.00 199.71\" width=\"734pt\" xmlns=\"http://www.w3.org/2000/svg\" xmlns:xlink=\"http://www.w3.org/1999/xlink\">\n",
         "<g class=\"graph\" id=\"graph0\" transform=\"scale(0.524532 0.524532) rotate(0) translate(4 376.74)\">\n",
@@ -637,11 +664,11 @@
         "</svg>"
        ],
        "text": [
-        "<IPython.core.display.SVG at 0x7f6211d5b400>"
+        "<IPython.core.display.SVG object>"
        ]
       }
      ],
-     "prompt_number": 7
+     "prompt_number": 8
     },
     {
      "cell_type": "code",
@@ -655,7 +682,7 @@
       {
        "metadata": {},
        "output_type": "pyout",
-       "prompt_number": 8,
+       "prompt_number": 9,
        "svg": [
         "<svg height=\"151pt\" viewBox=\"0.00 0.00 734.00 150.69\" width=\"734pt\" xmlns=\"http://www.w3.org/2000/svg\" xmlns:xlink=\"http://www.w3.org/1999/xlink\">\n",
         "<g class=\"graph\" id=\"graph0\" transform=\"scale(0.390662 0.390662) rotate(0) translate(4 381.74)\">\n",
@@ -993,11 +1020,11 @@
         "</svg>"
        ],
        "text": [
-        "<IPython.core.display.SVG at 0x7f621dda1400>"
+        "<IPython.core.display.SVG object>"
        ]
       }
      ],
-     "prompt_number": 8
+     "prompt_number": 9
     },
     {
      "cell_type": "code",
@@ -1011,7 +1038,7 @@
       {
        "metadata": {},
        "output_type": "pyout",
-       "prompt_number": 9,
+       "prompt_number": 10,
        "svg": [
         "<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"no\"?>\n",
         "<!DOCTYPE svg PUBLIC \"-//W3C//DTD SVG 1.1//EN\"\n",
@@ -1063,11 +1090,11 @@
         "</svg>\n"
        ],
        "text": [
-        "<spot.impl.twa_graph; proxy of <Swig Object of type 'std::shared_ptr< spot::twa_graph > *' at 0x7f621de1c2d0> >"
+        "<spot.impl.twa_graph; proxy of <Swig Object of type 'std::shared_ptr< spot::twa_graph > *' at 0x7f426c05f960> >"
        ]
       }
      ],
-     "prompt_number": 9
+     "prompt_number": 10
     },
     {
      "cell_type": "code",
@@ -1081,7 +1108,7 @@
       {
        "metadata": {},
        "output_type": "pyout",
-       "prompt_number": 10,
+       "prompt_number": 11,
        "svg": [
         "<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"no\"?>\n",
         "<!DOCTYPE svg PUBLIC \"-//W3C//DTD SVG 1.1//EN\"\n",
@@ -1225,20 +1252,22 @@
         "</svg>\n"
        ],
        "text": [
-        "<spot.impl.twa_product; proxy of <Swig Object of type 'std::shared_ptr< spot::twa_product > *' at 0x7f6211db0cc0> >"
+        "<spot.impl.twa_product; proxy of <Swig Object of type 'std::shared_ptr< spot::twa_product > *' at 0x7f426c309600> >"
        ]
       }
      ],
-     "prompt_number": 10
+     "prompt_number": 11
     },
     {
      "cell_type": "code",
      "collapsed": false,
-     "input": [],
+     "input": [
+      "!rm -f test1.dve"
+     ],
      "language": "python",
      "metadata": {},
      "outputs": [],
-     "prompt_number": 10
+     "prompt_number": 12
     }
    ],
    "metadata": {}