diff --git a/docs/developer_setup.md b/docs/developer_setup.md
index 46a218cca..2977cece2 100644
--- a/docs/developer_setup.md
+++ b/docs/developer_setup.md
@@ -28,7 +28,7 @@ We recommend using RBenv to manage Ruby versions.
 
 2. Create a Postgres user
   ```bash
-  sudo su - postgres -c "createuser <username> -P"
+  sudo su - postgres -c "createuser <username> -s -P"
   ```
 
 3. Install RBenv & Ruby-build
@@ -43,10 +43,8 @@ We recommend using RBenv to manage Ruby versions.
 
   Linux (Debian):
   ```bash
-  sudo apt install -y rbenv
-  echo 'export PATH="/usr/local/rbenv/bin:\$PATH"' >> ~/.bashrc
+  sudo apt install -y rbenv git
   rbenv init
-  echo "# Load RBenv" >> ~/.bashrc
   echo 'eval "$(rbenv init -)"' >> ~/.bashrc
   mkdir -p ~/.rbenv/plugins
   git clone https://github.com/rbenv/ruby-build.git ~/.rbenv/plugins/ruby-build
@@ -57,6 +55,7 @@ We recommend using RBenv to manage Ruby versions.
   ```bash
   rbenv install 3.1.2
   rbenv global 3.1.2
+  source ~/.bashrc
   gem install bundler
   ```
 
@@ -70,18 +69,19 @@ We recommend using RBenv to manage Ruby versions.
 
   Linux (Debian):
   ```bash
-  curl -sL https://deb.nodesource.com/setup_16.x | bash -
+  curl -sL https://deb.nodesource.com/setup_16.x | sudo bash -
   sudo apt -y install nodejs
-  mkdir "~/.npm-packages"
-  npm config set prefix "~/.npm-packages"
+  mkdir -p ~/.npm-packages
+  npm config set prefix ~/.npm-packages
   echo 'NPM_PACKAGES="~/.npm-packages"' >> ~/.bashrc
   echo 'export PATH="$PATH:$NPM_PACKAGES/bin"' >> ~/.bashrc
-  npm install --global yarn
+  source ~/.bashrc
+  npm install --location=global yarn
   ```
 
 6. Clone the repo
   ```bash
-  git clone git@github.com:communitiesuk/submit-social-housing-lettings-and-sales-data.git
+  git clone https://github.com/communitiesuk/submit-social-housing-lettings-and-sales-data.git
   ```
 
 
@@ -93,10 +93,10 @@ We recommend using RBenv to manage Ruby versions.
   `bundle install && yarn install`
 
 3. Create the database & run migrations:\
-  `rake db:create db:migrate`
+  `bundle exec rake db:create db:migrate`
 
 4. Seed the database if required:\
-  `rake db:seed`
+  `bundle exec rake db:seed`
 
 5. Start the dev servers
 
@@ -118,6 +118,17 @@ Development mode will target the latest versions of Chrome, Firefox and Safari f
 
 The Rails server will start on <http://localhost:3000>.
 
+6. Install Gecko Driver
+
+Linux (Debian):
+```bash
+wget https://github.com/mozilla/geckodriver/releases/download/v0.31.0/geckodriver-v0.31.0-linux64.tar.gz
+tar -xvzf geckodriver-v0.31.0-linux64.tar.gz
+rm geckodriver-v0.31.0-linux64.tar.gz
+chmod +x geckodriver
+sudo mv geckodriver /usr/local/bin/
+```
+
 Running the test suite (front end assets need to be built or server needs to be running):\
   `bundle exec rspec`