diff --git a/Dockerfile b/Dockerfile
index 634edb8af5999c1ee347d80b4225af96db42d856..1141149d9fd8c64ad6bef5638f97158f4882fcb8 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -23,7 +23,7 @@ RUN script/build_python_openzwave && \
 
 COPY requirements_all.txt requirements_all.txt
 RUN pip3 install --no-cache-dir -r requirements_all.txt && \
-    pip3 install mysqlclient psycopg2 uvloop
+    pip3 install --no-cache-dir mysqlclient psycopg2 uvloop
 
 # Copy source
 COPY . .
diff --git a/script/bootstrap b/script/bootstrap
index f4cb6753fe8500852890dc49941c9432cb260248..4e77ba60ed5de96996d650a5ba7802646545210d 100755
--- a/script/bootstrap
+++ b/script/bootstrap
@@ -1,9 +1,9 @@
 #!/bin/sh
+# Resolve all dependencies that the application requires to run.
 
-# script/bootstrap: Resolve all dependencies that the application requires to
-#                   run.
+# Stop on errors
+set -e
 
 cd "$(dirname "$0")/.."
-
 script/bootstrap_server
 script/bootstrap_frontend
diff --git a/script/bootstrap_frontend b/script/bootstrap_frontend
index 7062ecf3db5680f362140fd0910a3904550fc740..296f56c8f88345b2ceece8c219fd15ccc04e275c 100755
--- a/script/bootstrap_frontend
+++ b/script/bootstrap_frontend
@@ -1,7 +1,21 @@
+#!/bin/sh
+# Resolve all frontend dependencies that the application requires to run.
+
+# Stop on errors
+set -e
+
+cd "$(dirname "$0")/.."
+
 echo "Bootstrapping frontend..."
+
 git submodule update
 cd homeassistant/components/frontend/www_static/home-assistant-polymer
+
+# Install node modules
 npm install
-./node_modules/.bin/bower install
+
+# Install bower web components. Allow to download the components as root since the user in docker is root.
+./node_modules/.bin/bower install --allow-root
+
 npm run setup_js_dev
 cd ../../../../..
diff --git a/script/bootstrap_server b/script/bootstrap_server
index f71abda0e65bdac9e3872172e7db64b1357e9233..ccb7d1a8464ab3002e2c6b9f2209987d1b17aeb8 100755
--- a/script/bootstrap_server
+++ b/script/bootstrap_server
@@ -1,3 +1,9 @@
+#!/bin/sh
+# Resolve all server dependencies that the application requires to run.
+
+# Stop on errors
+set -e
+
 cd "$(dirname "$0")/.."
 
 echo "Installing dependencies..."
diff --git a/script/build_frontend b/script/build_frontend
index a00f89f1eeae548d5d2327ba52e8058655510873..0cb976d4fa5d38a9b04dbcfae8eb7856f6dc8987 100755
--- a/script/build_frontend
+++ b/script/build_frontend
@@ -1,22 +1,30 @@
+#!/bin/sh
 # Builds the frontend for production
 
+# Stop on errors
+set -e
+
 cd "$(dirname "$0")/.."
 
-cd homeassistant/components/frontend/www_static
-rm -rf core.js* frontend.html* webcomponents-lite.min.js* panels
-cd home-assistant-polymer
+# Clean up
+rm -rf homeassistant/components/frontend/www_static/core.js* \
+       homeassistant/components/frontend/www_static/frontend.html* \
+       homeassistant/components/frontend/www_static/webcomponents-lite.min.js* \
+       homeassistant/components/frontend/www_static/panels
+cd homeassistant/components/frontend/www_static/home-assistant-polymer
 npm run clean
-npm run frontend_prod
 
+# Build frontend
+npm run frontend_prod
 cp bower_components/webcomponentsjs/webcomponents-lite.min.js ..
 cp -r build/* ..
 BUILD_DEV=0 node script/gen-service-worker.js
 cp build/service_worker.js ..
-
 cd ..
 
+# Pack frontend
 gzip -f -k -9 *.html *.js ./panels/*.html
+cd ../../../..
 
 # Generate the MD5 hash of the new frontend
-cd ../../../..
 script/fingerprint_frontend.py
diff --git a/script/build_python_openzwave b/script/build_python_openzwave
index d4e3e07b76952acf623ef2edb613f5ad5303795d..db82fe08d8b0769e74c48c99580fae2b8d6a10b8 100755
--- a/script/build_python_openzwave
+++ b/script/build_python_openzwave
@@ -1,7 +1,11 @@
-# Sets up and builds python open zwave to be used with Home Assistant
+#!/bin/sh
+# Sets up and builds python open zwave to be used with Home Assistant.
 # Dependencies that need to be installed:
 # apt-get install cython3 libudev-dev python3-sphinx python3-setuptools
 
+# Stop on errors
+set -e
+
 cd "$(dirname "$0")/.."
 
 if [ ! -d build ]; then
@@ -15,7 +19,7 @@ if [ -d python-openzwave ]; then
   git pull --recurse-submodules=yes
   git submodule update --init --recursive
 else
-  git clone --recursive --depth 1 https://github.com/OpenZWave/python-openzwave.git
+  git clone --branch python3 --recursive --depth 1 https://github.com/OpenZWave/python-openzwave.git
   cd python-openzwave
 fi
 
diff --git a/script/dev_docker b/script/dev_docker
index b63afaa36daa7bffb1b7937e218d980bbe9dfe5f..73c4ee60d0ae437ae4e153b1e1a1d41ed5ae073b 100755
--- a/script/dev_docker
+++ b/script/dev_docker
@@ -1,11 +1,15 @@
-# Build and run Home Assinstant in Docker
+#!/bin/sh
+# Build and run Home Assinstant in Docker.
 
 # Optional: pass in a timezone as first argument
 # If not given will attempt to mount /etc/localtime
 
+# Stop on errors
+set -e
+
 cd "$(dirname "$0")/.."
 
-docker build -t home-assistant-dev .
+docker build -t home-assistant-dev -f virtualization/Docker/Dockerfile.dev .
 
 if [ $# -gt 0 ]
 then
diff --git a/script/dev_openzwave_docker b/script/dev_openzwave_docker
index 387c38ef6da079d50a690db939e1dcacebdf1fc8..7304995f3e18ebb907fd6a5c1fd88024133df3cb 100755
--- a/script/dev_openzwave_docker
+++ b/script/dev_openzwave_docker
@@ -1,5 +1,5 @@
-# Open a docker that can be used to debug/dev python-openzwave
-# Pass in a command line argument to build
+#!/bin/sh
+# Open a docker that can be used to debug/dev python-openzwave. Pass in a command line argument to build
 
 cd "$(dirname "$0")/.."
 
diff --git a/script/fingerprint_frontend.py b/script/fingerprint_frontend.py
index e04f3eefe6a0b906a27e3f7ceb5c6e6e23e8a4c4..23b959cdc37f810e79445841434d501b448a0da3 100755
--- a/script/fingerprint_frontend.py
+++ b/script/fingerprint_frontend.py
@@ -1,6 +1,6 @@
 #!/usr/bin/env python3
-
 """Generate a file with all md5 hashes of the assets."""
+
 from collections import OrderedDict
 import glob
 import hashlib
diff --git a/script/lint b/script/lint
index d607aa87bb6d033249c154f61f0f7dc87c35cf01..624ff0e5093e2265d3cf7b145b4faac21f02e2a9 100755
--- a/script/lint
+++ b/script/lint
@@ -1,7 +1,5 @@
 #!/bin/sh
-#
-# NOTE: all testing is now driven through tox. The tox command below
-# performs roughly what this test did in the past.
+# Execute lint to spot code mistakes.
 
 if [ "$1" = "--changed" ]; then
   export files="`git diff upstream/dev --name-only | grep -e '\.py$'`"
diff --git a/script/lint_docker b/script/lint_docker
index 61f4e4be96aa50f371ff0a4f68e2c6d12290790b..dca877d49ffd3164a61f373f07f8702c9c59ca77 100755
--- a/script/lint_docker
+++ b/script/lint_docker
@@ -1,5 +1,8 @@
-#!/bin/bash
+#!/bin/sh
+# Execute lint in a docker container to spot code mistakes.
+
+# Stop on errors
 set -e
 
-docker build -t home-assistant-test -f virtualization/Docker/Dockerfile.test .
+docker build -t home-assistant-test -f virtualization/Docker/Dockerfile.dev .
 docker run --rm -it home-assistant-test tox -e lint
diff --git a/script/release b/script/release
index 43af9b92cb1fd6a6e8f3a5b5f78d1488fc3e803a..3bcddcfef760adaf86ea7a0b7552aa949d199bd5 100755
--- a/script/release
+++ b/script/release
@@ -1,4 +1,8 @@
-# Pushes a new version to PyPi
+#!/bin/sh
+# Pushes a new version to PyPi.
+
+# Stop on errors
+set -e
 
 cd "$(dirname "$0")/.."
 
diff --git a/script/server b/script/server
index 0904bfd728e218c31b8febe1989bbd550073eee0..4d246c8be4444d02d6d81b1bb6c20d6e78da7b65 100755
--- a/script/server
+++ b/script/server
@@ -1,8 +1,8 @@
 #!/bin/sh
+# Launch the application and any extra required processes locally.
 
-# script/server: Launch the application and any extra required processes
-#                locally.
+# Stop on errors
+set -e
 
 cd "$(dirname "$0")/.."
-
 python3 -m homeassistant -c config
diff --git a/script/setup b/script/setup
index 443dee7889f5451548ac9e62ca0a2b3a98f215f9..3dbfc1d2c97b797850cfb1e9e0dbe94623de6329 100755
--- a/script/setup
+++ b/script/setup
@@ -1,6 +1,10 @@
-#!/usr/bin/env sh
-cd "$(dirname "$0")/.."
+#!/bin/sh
+# Setups the repository.
+
+# Stop on errors
+set -e
 
+cd "$(dirname "$0")/.."
 git submodule init
 script/bootstrap
 python3 setup.py develop
diff --git a/script/test b/script/test
index dac5c43d2de1372b7520f2331a64a37a4c46fc55..7aca00421b3367465e18bdbc67632febaae1e091 100755
--- a/script/test
+++ b/script/test
@@ -1,6 +1,4 @@
 #!/bin/sh
-#
-# NOTE: all testing is now driven through tox. The tox command below
-# performs roughly what this test did in the past.
+# Excutes the tests with tox.
 
 tox -e py34
diff --git a/script/test_docker b/script/test_docker
index ab2296cf5fc36435850c9447ffc4395c6a0e37ef..78b4247857b365283b62b02c7888ebeb67879684 100755
--- a/script/test_docker
+++ b/script/test_docker
@@ -1,5 +1,8 @@
-#!/bin/bash
+#!/bin/sh
+# Excutes the tests with tox in a docker container.
+
+# Stop on errors
 set -e
 
-docker build -t home-assistant-test -f virtualization/Docker/Dockerfile.test .
-docker run --rm -it home-assistant-test tox -e py34
+docker build -t home-assistant-test -f virtualization/Docker/Dockerfile.dev .
+docker run --rm -it home-assistant-test tox -e py35
diff --git a/script/update b/script/update
index 9f8b2530a7e3445ad9fd4b221308f77b9dfa147f..7866cd7a18dec68949c5e076589723d7745597d0 100755
--- a/script/update
+++ b/script/update
@@ -1,8 +1,9 @@
 #!/bin/sh
+# Update application to run for its current checkout.
 
-# script/update: Update application to run for its current checkout.
+# Stop on errors
+set -e
 
 cd "$(dirname "$0")/.."
-
 git pull
 git submodule update
diff --git a/script/update_mdi.py b/script/update_mdi.py
index af9ee26c9494732cc67a47108c058c3be4845d69..f9a0a8aca9f9195cbcdf886c83deaf72e7a7e7dc 100755
--- a/script/update_mdi.py
+++ b/script/update_mdi.py
@@ -1,6 +1,6 @@
 #!/usr/bin/env python3
-
 """Download the latest Polymer v1 iconset for materialdesignicons.com."""
+
 import gzip
 import os
 import re
diff --git a/tox.ini b/tox.ini
index 1cf402468b587584a4d334d8b3fddcbdcd61e319..a5f6ea45f5324daffd39b7630a9a40480d5f3d37 100644
--- a/tox.ini
+++ b/tox.ini
@@ -8,7 +8,7 @@ setenv =
 ; which get read in from setup.py. If we don't force our locale to a
 ; utf8 one, tox's env is reset. And the install of these 2 packages
 ; fail.
-    LANG=en_US.UTF-8
+    LANG=C.UTF-8
     PYTHONPATH = {toxinidir}:{toxinidir}/homeassistant
 commands =
      py.test --timeout=30 --duration=10 --cov --cov-report= {posargs}
diff --git a/virtualization/Docker/Dockerfile.dev b/virtualization/Docker/Dockerfile.dev
new file mode 100644
index 0000000000000000000000000000000000000000..3b5eb493f82749b641d7446afcf8354ffab8c267
--- /dev/null
+++ b/virtualization/Docker/Dockerfile.dev
@@ -0,0 +1,56 @@
+# Dockerfile for development
+# Based on the production Dockerfile, but with development additions.
+# Keep this file as close as possible to the production Dockerfile, so the environments match.
+
+FROM python:3.5
+MAINTAINER Paulus Schoutsen <Paulus@PaulusSchoutsen.nl>
+
+VOLUME /config
+
+RUN mkdir -p /usr/src/app
+WORKDIR /usr/src/app
+
+RUN pip3 install --no-cache-dir colorlog cython
+
+# For the nmap tracker, bluetooth tracker, Z-Wave, tellstick
+RUN echo "deb http://download.telldus.com/debian/ stable main" >> /etc/apt/sources.list.d/telldus.list && \
+    wget -qO - http://download.telldus.se/debian/telldus-public.key | apt-key add - && \
+    apt-get update && \
+    apt-get install -y --no-install-recommends nmap net-tools cython3 libudev-dev sudo libglib2.0-dev bluetooth libbluetooth-dev \
+            libtelldus-core2 && \
+    apt-get clean && rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*
+
+COPY script/build_python_openzwave script/build_python_openzwave
+RUN script/build_python_openzwave && \
+  mkdir -p /usr/local/share/python-openzwave && \
+  ln -sf /usr/src/app/build/python-openzwave/openzwave/config /usr/local/share/python-openzwave/config
+
+COPY requirements_all.txt requirements_all.txt
+RUN pip3 install --no-cache-dir -r requirements_all.txt && \
+    pip3 install --no-cache-dir mysqlclient psycopg2 uvloop
+
+# BEGIN: Development additions
+
+# Install nodejs
+RUN curl -sL https://deb.nodesource.com/setup_7.x | sudo -E bash - && \
+    apt-get install -y nodejs
+
+# Install tox
+RUN pip3 install --no-cache-dir tox
+
+# Copy over everything required to run tox
+COPY requirements_test.txt .
+COPY setup.cfg .
+COPY setup.py .
+COPY tox.ini .
+COPY homeassistant/const.py homeassistant/const.py
+
+# Get all dependencies
+RUN tox -e py35 --notest
+
+# END: Development additions
+
+# Copy source
+COPY . .
+
+CMD [ "python", "-m", "homeassistant", "--config", "/config" ]
diff --git a/virtualization/Docker/Dockerfile.test b/virtualization/Docker/Dockerfile.test
deleted file mode 100644
index 651f19e47201e72dab071bf4749618980c19d6ef..0000000000000000000000000000000000000000
--- a/virtualization/Docker/Dockerfile.test
+++ /dev/null
@@ -1,32 +0,0 @@
-FROM python:3.4
-MAINTAINER Paulus Schoutsen <Paulus@PaulusSchoutsen.nl>
-
-VOLUME /config
-
-RUN mkdir -p /usr/src/app
-WORKDIR /usr/src/app
-
-RUN pip3 install --no-cache-dir colorlog cython
-
-# For the nmap tracker, bluetooth tracker, Z-Wave
-RUN apt-get update && \
-    apt-get install -y --no-install-recommends nmap net-tools cython3 libudev-dev sudo libglib2.0-dev locales-all bluetooth libbluetooth-dev && \
-    apt-get clean && rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*
-
-RUN pip3 install --no-cache-dir tox
-
-# Copy over everything required to run tox
-COPY requirements_all.txt requirements_all.txt
-COPY requirements_test.txt requirements_test.txt
-COPY setup.cfg setup.cfg
-COPY setup.py setup.py
-COPY tox.ini tox.ini
-COPY homeassistant/const.py homeassistant/const.py
-
-# Get deps
-RUN tox --notest
-
-# Copy source and run tests
-COPY . .
-
-CMD [ "tox" ]