diff --git a/spec/db/seeds_spec.rb b/spec/db/seeds_spec.rb
index 71cb7274..2572b9c9 100644
--- a/spec/db/seeds_spec.rb
+++ b/spec/db/seeds_spec.rb
@@ -18,6 +18,9 @@ describe 'seeds' do
     }
     allow_any_instance_of(ExecutionEnvironment).to receive(:working_docker_image?).and_return true
     allow_any_instance_of(ExecutionEnvironment).to receive(:sync_runner_environment).and_return true
+
+    # Disable confirmation message while testing seeds
+    allow(HighLine).to receive(:say)
   end
 
   describe 'execute db:seed', cleaning_strategy: :truncation do
diff --git a/spec/support/selenium.rb b/spec/support/selenium.rb
index f948f9be..29b78c1f 100644
--- a/spec/support/selenium.rb
+++ b/spec/support/selenium.rb
@@ -21,3 +21,6 @@ Capybara.register_driver :selenium do |app|
   driver
 end
 Capybara.javascript_driver = :selenium
+
+# Specify to use puma as server and disable debug output
+Capybara.server = :puma, {Silent: true}