diff --git a/notebooks/Convolutional layer tests.ipynb b/notebooks/Convolutional layer tests.ipynb
index 5870d46..8c085cc 100644
--- a/notebooks/Convolutional layer tests.ipynb	
+++ b/notebooks/Convolutional layer tests.ipynb	
@@ -15,10 +15,13 @@
    "cell_type": "code",
    "execution_count": null,
    "metadata": {
-    "collapsed": true
+    "collapsed": false
    },
    "outputs": [],
    "source": [
+    "import mlp.layers as layers\n",
+    "import mlp.initialisers as init\n",
+    "\n",
     "class ConvolutionalLayer(layers.LayerWithParameters):\n",
     "    \"\"\"Layer implementing a 2D convolution-based transformation of its inputs.\n",
     "\n",
@@ -187,6 +190,8 @@
    },
    "outputs": [],
    "source": [
+    "import numpy as np\n",
+    "\n",
     "def test_conv_layer_fprop(layer_class, do_cross_correlation=False):\n",
     "    \"\"\"Tests `fprop` method of a convolutional layer.\n",
     "    \n",