diff --git a/test/test_helper.rb b/test/test_helper.rb
index 189bd4a..3ee07f3 100644
--- a/test/test_helper.rb
+++ b/test/test_helper.rb
@@ -18,6 +18,7 @@
 ActiveRecord::Base.configurations = {
   default_env: {
     url: ENV.fetch('DATABASE_URL', "sqlite3://#{Dir.tmpdir}/with_advisory_lock_test#{RUBY_VERSION}-#{ActiveRecord.gem_version}.sqlite3"),
+    pool: 20,
     properties: { allowPublicKeyRetrieval: true } # for JRuby madness
   }
 }
@@ -62,4 +63,4 @@ def is_postgresql_adapter?; adapter_support.postgresql?; end
 end
 
 puts "Testing with #{env_db} database, ActiveRecord #{ActiveRecord.gem_version} and #{RUBY_ENGINE} #{RUBY_ENGINE_VERSION} as #{RUBY_VERSION}"
-puts "Connection Pool size: #{ActiveRecord::Base.connection_pool.size}"
\ No newline at end of file
+puts "Connection Pool size: #{ActiveRecord::Base.connection_pool.size}"