diff --git a/Gemfile b/Gemfile
index 0873cc1..8d33553 100644
--- a/Gemfile
+++ b/Gemfile
@@ -11,4 +11,12 @@ gemspec
 gem 'solidus_extension_dev_tools', github: 'solidusio-contrib/solidus_extension_dev_tools'
 gem 'sprockets', '~> 3'
 gem 'sprockets-rails'
-gem 'sqlite3'
+
+case ENV['DB']
+when 'postgresql'
+  gem 'pg'
+when 'mysql'
+  gem 'mysql2'
+else
+  gem 'sqlite3'
+end
diff --git a/spec/support/dummy_app/database.yml b/spec/support/dummy_app/database.yml
index 4035f6e..abb833b 100644
--- a/spec/support/dummy_app/database.yml
+++ b/spec/support/dummy_app/database.yml
@@ -1,4 +1,16 @@
+<% if ENV['DB'] == 'postgresql' %>
+test:
+  adapter: postgresql
+  database: circle_test
+  username: root
+<% elsif ENV['DB'] == 'mysql' %>
+test:
+  adapter: mysql2
+  database: circle_test
+  username: root
+<% else %>
 test:
   adapter: sqlite3
   database: ':memory:'
   timeout: 10000
+<% end %>