1 files changed, 18 insertions, 0 deletions
diff --git a/railties/test/isolation/abstract_unit.rb b/railties/test/isolation/abstract_unit.rb
index 362c2c510a..a03b34bd16 100644
--- a/railties/test/isolation/abstract_unit.rb
+++ b/railties/test/isolation/abstract_unit.rb
@@ -117,6 +117,24 @@ module TestHelpers
         end
       end
 
+      File.open("#{app_path}/config/database.yml", "w") do |f|
+        f.puts <<-YAML
+        default: &default
+          adapter: sqlite3
+          pool: 5
+          timeout: 5000
+        development:
+          <<: *default
+          database: db/development.sqlite3
+        test:
+          <<: *default
+          database: db/test.sqlite3
+        production:
+          <<: *default
+          database: db/production.sqlite3
+        YAML
+      end
+
       add_to_config <<-RUBY
         config.eager_load = false
         config.session_store :cookie_store, key: "_myapp_session"