diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
new file mode 100644
index 0000000..30b9997
--- /dev/null
+++ b/.github/workflows/tests.yml
@@ -0,0 +1,34 @@
+name: Run unit tests
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+jobs:
+  unit_tests:
+    runs-on: ubuntu-latest
+    services:
+      postgres:
+        image: postgres
+        env:
+          POSTGRES_USER: postgres
+          POSTGRES_PASSWORD: postgres
+        options: >-
+          --health-cmd pg_isready
+          --health-interval 10s
+          --health-timeout 5s
+          --health-retries 5
+        ports:
+          - 5432
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          token: ${{ secrets.GITHUB_TOKEN }}
+      - uses: ruby/setup-ruby@v1
+      - run: bundle install
+      - run: |
+          bundle exec rake db:create db:schema:load
+          bundle exec rspec
+        env:
+          RAILS_ENV: test
+          DATABASE_URL: postgres://postgres:postgres@postgres:5432/postgres
diff --git a/Gemfile.lock b/Gemfile.lock
index 8d5808f..90a4379 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -239,7 +239,7 @@ GEM
     stringio (3.1.1)
     thor (1.3.1)
     timeout (0.4.1)
-    turbo-rails (2.0.5)
+    turbo-rails (2.0.6)
       actionpack (>= 6.0.0)
       activejob (>= 6.0.0)
       railties (>= 6.0.0)
diff --git a/app/controllers/guests_controller.rb b/app/controllers/guests_controller.rb
index 025f7ef..72baf50 100644
--- a/app/controllers/guests_controller.rb
+++ b/app/controllers/guests_controller.rb
@@ -1,3 +1,5 @@
+require 'csv'
+
 class GuestsController < ApplicationController
   before_action :set_guest, only: %i[show edit update destroy]
 
@@ -58,6 +60,20 @@ class GuestsController < ApplicationController
     end
   end
 
+  def import
+    csv = CSV.parse(params[:file].read, headers: true)
+    ActiveRecord::Base.transaction do
+      csv.each do |row|
+        guest = Guest.create!(first_name: row['name'])
+
+        guest.affinity_group_list.add(row['affinity_group'])
+        guest.save!
+      end
+    end
+
+    redirect_to guests_url
+  end
+
   private
 
   # Use callbacks to share common setup or constraints between actions.
diff --git a/app/views/guests/index.html.erb b/app/views/guests/index.html.erb
index 436a01b..d71cfa8 100644
--- a/app/views/guests/index.html.erb
+++ b/app/views/guests/index.html.erb
@@ -29,3 +29,9 @@
 </div>
 
 <%= link_to "New guest", new_guest_path %>
+
+<%= form_with url: import_guests_path, method: :post do |form| %>
+  <%= form.label :file %>
+  <%= form.file_field :file %>
+  <%= form.submit "Import" %>
+<% end %>
diff --git a/config/routes.rb b/config/routes.rb
index 2b43138..67f091d 100644
--- a/config/routes.rb
+++ b/config/routes.rb
@@ -1,5 +1,7 @@
 Rails.application.routes.draw do
-  resources :guests
+  resources :guests do
+    post :import, on: :collection
+  end
   resources :expenses
   resources :tables_arrangements, only: [:index, :show]