diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 777e9fa..8a7c089 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -50,9 +50,9 @@ jobs:
           - activerecord_6.1
           - activerecord_edge
         adapter:
-          - '' # SQLite3
+          - sqlite3:///tmp/closure_tree_test
           - mysql2://root:root@0/closure_tree_test
-          - postgres://closure_tree:closure_tree@0/closure_tree_test
+          - postgres://postgres:postgres@0/closure_tree_test
         exclude:
           - ruby: '3.0'
             rails: activerecord_edge
diff --git a/.github/workflows/ci_jruby.yml b/.github/workflows/ci_jruby.yml
index 04f1d5a..558fbcc 100644
--- a/.github/workflows/ci_jruby.yml
+++ b/.github/workflows/ci_jruby.yml
@@ -43,9 +43,9 @@ jobs:
           - activerecord_7.0
           - activerecord_6.1
         adapter:
-          - '' # SQLite3
+          - sqlite3:///tmp/closure_tree_test
           - mysql2://root:root@0/closure_tree_test
-          - postgres://closure_tree:closure_tree@0/closure_tree_test
+          - postgres://postgres:postgres@0/closure_tree_test
     steps:
       - name: Checkout
         uses: actions/checkout@v4
diff --git a/.github/workflows/ci_truffleruby.yml b/.github/workflows/ci_truffleruby.yml
index 7dc07ab..77bf270 100644
--- a/.github/workflows/ci_truffleruby.yml
+++ b/.github/workflows/ci_truffleruby.yml
@@ -45,9 +45,9 @@ jobs:
           - activerecord_7.0
           - activerecord_6.1
         adapter:
-          - '' # SQLite3
+          - sqlite3:///tmp/closure_tree_test
           - mysql2://root:root@0/closure_tree_test
-          - postgres://closure_tree:closure_tree@0/closure_tree_test
+          - postgres://postgres:postgres@0/closure_tree_test
 
     steps:
       - name: Checkout
diff --git a/.gitignore b/.gitignore
index 2f6900c..e9f555f 100644
--- a/.gitignore
+++ b/.gitignore
@@ -14,3 +14,4 @@ tmp/
 .ruby-*
 *.iml
 coverage/
+.env
diff --git a/spec/spec_helper.rb b/spec/spec_helper.rb
index 2466790..aabdd6f 100644
--- a/spec/spec_helper.rb
+++ b/spec/spec_helper.rb
@@ -1,6 +1,5 @@
 # frozen_string_literal: true
 
-
 require 'database_cleaner'
 require 'closure_tree/test/matcher'
 require 'tmpdir'
@@ -11,6 +10,7 @@
 require 'active_record'
 require 'active_support/core_ext/array'
 
+puts "Using ActiveRecord #{ActiveRecord.gem_version} and #{RUBY_ENGINE} #{RUBY_ENGINE_VERSION} as #{RUBY_VERSION}"
 
 # Start Simplecov
 if RUBY_ENGINE == 'ruby'
@@ -20,20 +20,25 @@
   end
 end
 
-database_file = SecureRandom.hex
-ActiveRecord::Base.configurations = debug = {
+primary_database_url = ENV['DATABASE_URL'].presence || "sqlite3:///tmp/closure_tree_test"
+secondary_database_url = ENV['SECONDARY_DATABASE_URL'].presence || "sqlite3:///tmp/closure_tree_test-s"
+
+puts "Using primary database #{primary_database_url}"
+puts "Using secondary database #{secondary_database_url}"
+
+ActiveRecord::Base.configurations = {
   default_env: {
-    url: ENV['DATABASE_URL'].presence || "sqlite3://#{Dir.tmpdir}/#{database_file}.sqlite3",
-    properties: { allowPublicKeyRetrieval: true } # for JRuby madness
-  },
-  secondary_env: {
-    url: ENV['SECONDARY_DATABASE_URL'].presence || "sqlite3://#{Dir.tmpdir}/#{database_file}-s.sqlite3",
-    properties: { allowPublicKeyRetrieval: true } # for JRuby madness
+    primary: {
+      url: primary_database_url,
+      properties: { allowPublicKeyRetrieval: true } # for JRuby madness
+    },
+    secondary: {
+      url: secondary_database_url,
+      properties: { allowPublicKeyRetrieval: true } # for JRuby madness
+    }
   }
 }
 
-puts "Testing with #{debug}"
-
 # Configure ActiveRecord
 ActiveRecord::Migration.verbose = false
 ActiveRecord::Base.table_name_prefix = ENV['DB_PREFIX'].to_s
@@ -75,15 +80,12 @@ def sqlite?
   # disable monkey patching
   # see: https://relishapp.com/rspec/rspec-core/v/3-8/docs/configuration/zero-monkey-patching-mode
   config.disable_monkey_patching!
+  config.before(:suite) do
+    ENV['FLOCK_DIR'] = Dir.mktmpdir if sqlite?
+  end
 
-  if sqlite?
-    config.before(:suite) do
-      ENV['FLOCK_DIR'] = Dir.mktmpdir
-    end
-
-    config.after(:suite) do
-      FileUtils.remove_entry_secure ENV['FLOCK_DIR']
-    end
+  config.after(:suite) do
+    FileUtils.remove_entry_secure(ENV['FLOCK_DIR']) if sqlite?
   end
 end
 
@@ -94,10 +96,19 @@ def sqlite?
 # See: https://github.com/ClosureTree/with_advisory_lock
 ENV['WITH_ADVISORY_LOCK_PREFIX'] ||= SecureRandom.hex
 
-ActiveRecord::Base.connection.recreate_database("closure_tree_test") unless sqlite?
-puts "Testing with #{env_db} database, ActiveRecord #{ActiveRecord.gem_version} and #{RUBY_ENGINE} #{RUBY_ENGINE_VERSION} as #{RUBY_VERSION}"
 # Require our gem
 require 'closure_tree'
+begin
+  ActiveRecord::Base.establish_connection(:primary)
+rescue
+  ActiveRecord::Tasks::DatabaseTasks.create_current('primary')
+end
+
+begin
+  ActiveRecord::Base.establish_connection(:secondary)
+rescue
+  ActiveRecord::Tasks::DatabaseTasks.create_current('secondary')
+end
 
 # Load test helpers
 require_relative 'support/schema'
@@ -105,3 +116,4 @@ def sqlite?
 require_relative 'support/helpers'
 require_relative 'support/exceed_query_limit'
 require_relative 'support/query_counter'
+puts "Testing with #{env_db} database"
diff --git a/spec/support/models.rb b/spec/support/models.rb
index 077a7b7..eee6841 100644
--- a/spec/support/models.rb
+++ b/spec/support/models.rb
@@ -10,7 +10,7 @@ def to_s
 
   def add_destroyed_tag
     # Proof for the tests that the destroy rather than the delete method was called:
-    DestroyedTag.create(name:)
+    DestroyedTag.create(name: to_s)
   end
 end
 
@@ -30,7 +30,7 @@ def to_s
 
   def add_destroyed_tag
     # Proof for the tests that the destroy rather than the delete method was called:
-    DestroyedTag.create(name:)
+    DestroyedTag.create(name: to_s)
   end
 end
 
diff --git a/spec/support/schema.rb b/spec/support/schema.rb
index 7d92f40..0626605 100644
--- a/spec/support/schema.rb
+++ b/spec/support/schema.rb
@@ -7,7 +7,7 @@ class ApplicationRecord < ActiveRecord::Base
 class SecondDatabaseRecord < ActiveRecord::Base
   self.abstract_class = true
 
-  establish_connection :secondary_env
+  establish_connection :secondary
 end
 
 ActiveRecord::Schema.define(version: 0) do
diff --git a/test/test_helper.rb b/test/test_helper.rb
index cdb6c6b..8a870a6 100644
--- a/test/test_helper.rb
+++ b/test/test_helper.rb
@@ -7,23 +7,29 @@
 require 'support/query_counter'
 require 'parallel'
 
-database_file = SecureRandom.hex
-ActiveRecord::Base.configurations = debug = {
+puts "Using ActiveRecord #{ActiveRecord.gem_version} and #{RUBY_ENGINE} #{RUBY_ENGINE_VERSION} as #{RUBY_VERSION}"
+
+primary_database_url = ENV['DATABASE_URL'].presence || "sqlite3:///tmp/closure_tree_test"
+secondary_database_url = ENV['SECONDARY_DATABASE_URL'].presence || "sqlite3:///tmp/closure_tree_test-s"
+
+puts "Using primary database #{primary_database_url}"
+puts "Using secondary database #{secondary_database_url}"
+
+ActiveRecord::Base.configurations = {
   default_env: {
-    url: ENV['DATABASE_URL'].presence || "sqlite3://#{Dir.tmpdir}/#{database_file}.sqlite3",
-    properties: { allowPublicKeyRetrieval: true } # for JRuby madness
-  },
-  secondary_env: {
-    url: ENV['SECONDARY_DATABASE_URL'].presence || "sqlite3://#{Dir.tmpdir}/#{database_file}-s.sqlite3",
-    properties: { allowPublicKeyRetrieval: true } # for JRuby madness
+    primary: {
+      url: primary_database_url,
+      properties: { allowPublicKeyRetrieval: true } # for JRuby madness
+    },
+    secondary: {
+      url: secondary_database_url,
+      properties: { allowPublicKeyRetrieval: true } # for JRuby madness
+    }
   }
 }
 
-puts "Testing with #{debug}"
-
 ENV['WITH_ADVISORY_LOCK_PREFIX'] ||= SecureRandom.hex
 
-
 def env_db
   @env_db ||= ActiveRecord::Base.connection_db_config.adapter.to_sym
 end
@@ -37,9 +43,9 @@ def sqlite?
   env_db == :sqlite3
 end
 
-puts "Testing with #{env_db} database, ActiveRecord #{ActiveRecord.gem_version} and #{RUBY_ENGINE} #{RUBY_ENGINE_VERSION} as #{RUBY_VERSION}"
 
 DatabaseCleaner.strategy = :truncation
+DatabaseCleaner.allow_remote_database_url = true
 
 module Minitest
   class Spec
@@ -61,6 +67,19 @@ class Spec
 Thread.abort_on_exception = true
 
 require 'closure_tree'
+begin
+  ActiveRecord::Base.establish_connection(:primary)
+rescue
+  ActiveRecord::Tasks::DatabaseTasks.create_current('primary')
+end
+
+begin
+  ActiveRecord::Base.establish_connection(:secondary)
+rescue
+  ActiveRecord::Tasks::DatabaseTasks.create_current('secondary')
+end
+
 require_relative '../spec/support/schema'
 require_relative '../spec/support/models'
-ActiveRecord::Base.connection.recreate_database('closure_tree_test') unless sqlite?
+
+puts "Testing with #{env_db} database"