diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 7704685..fc3192a 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -29,6 +29,7 @@ jobs:
         ports: ['5432:5432']
         env:
           POSTGRES_PASSWORD: postgres
+          POSTGRES_USER: closure_tree
           POSTGRES_DB: closure_tree_test
         options: >-
           --health-cmd pg_isready
@@ -50,9 +51,9 @@ jobs:
           - activerecord_6.1
           - activerecord_edge
         adapter:
-          - 'sqlite3:///:memory:'
-          - mysql2://root:root@0/closure_tree_test
-          - postgres://closure_tree:closure_tree@0/closure_tree_test
+          - 'sqlite3:///tmp/closure_tree_test.sqlite3'
+          - mysql2://root:root@127.0.0.1:3306/closure_tree_test
+          - postgres://closure_tree:closure_tree@localhost:5432/closure_tree_test
         exclude:
           - ruby: '3.0'
             rails: activerecord_edge
@@ -74,7 +75,7 @@ jobs:
       - name: RSpec
         env:
           RAILS_VERSION: ${{ matrix.rails }}
-          DB_ADAPTER: ${{ matrix.adapter }}
+          DATABASE_URL: ${{ matrix.adapter }}
           BUNDLE_GEMFILE: gemfiles/${{ matrix.rails }}.gemfile
           WITH_ADVISORY_LOCK_PREFIX: ${{ github.run_id }}
         run: bin/rake
diff --git a/.github/workflows/ci_jruby.yml b/.github/workflows/ci_jruby.yml
index c7d0156..a9afc83 100644
--- a/.github/workflows/ci_jruby.yml
+++ b/.github/workflows/ci_jruby.yml
@@ -29,6 +29,7 @@ jobs:
         ports: ['5432:5432']
         env:
           POSTGRES_PASSWORD: postgres
+          POSTGRES_USER: closure_tree
           POSTGRES_DB: closure_tree_test
         options: >-
           --health-cmd pg_isready
@@ -43,9 +44,9 @@ jobs:
           - activerecord_7.0
           - activerecord_6.1
         adapter:
-          - 'sqlite3:///:memory:'
-          - mysql2://root:root@0/closure_tree_test
-          - postgres://closure_tree:closure_tree@0/closure_tree_test
+          - 'sqlite3:///tmp/closure_tree_test.sqlite3'
+          - mysql2://root:root@127.0.0.1:3306/closure_tree_test
+          - postgres://closure_tree:closure_tree@localhost:5432/closure_tree_test
     steps:
       - name: Checkout
         uses: actions/checkout@v3
@@ -63,7 +64,7 @@ jobs:
       - name: RSpec
         env:
           RAILS_VERSION: ${{ matrix.rails }}
-          DB_ADAPTER: ${{ matrix.adapter }}
+          DATABASE_URL: ${{ matrix.adapter }}
           BUNDLE_GEMFILE: gemfiles/${{ matrix.rails }}.gemfile
           WITH_ADVISORY_LOCK_PREFIX: ${{ github.run_id }}
         run: bin/rake
diff --git a/.github/workflows/ci_truffleruby.yml b/.github/workflows/ci_truffleruby.yml
index b61630f..e835897 100644
--- a/.github/workflows/ci_truffleruby.yml
+++ b/.github/workflows/ci_truffleruby.yml
@@ -29,6 +29,7 @@ jobs:
         ports: ['5432:5432']
         env:
           POSTGRES_PASSWORD: postgres
+          POSTGRES_USER: closure_tree
           POSTGRES_DB: closure_tree_test
         options: >-
           --health-cmd pg_isready
@@ -45,10 +46,9 @@ jobs:
           - activerecord_7.0
           - activerecord_6.1
         adapter:
-          - 'sqlite3:///:memory:'
-          - mysql2://root:root@0/closure_tree_test
-          - postgres://closure_tree:closure_tree@0/closure_tree_test
-
+          - 'sqlite3:///tmp/closure_tree_test.sqlite3'
+          - mysql2://root:root@127.0.0.1:3306/closure_tree_test
+          - postgres://closure_tree:closure_tree@localhost:5432/closure_tree_test
     steps:
       - name: Checkout
         uses: actions/checkout@v3
@@ -66,7 +66,7 @@ jobs:
       - name: RSpec
         env:
           RAILS_VERSION: ${{ matrix.rails }}
-          DB_ADAPTER: ${{ matrix.adapter }}
+          DATABASE_URL: ${{ matrix.adapter }}
           BUNDLE_GEMFILE: gemfiles/${{ matrix.rails }}.gemfile
           WITH_ADVISORY_LOCK_PREFIX: ${{ github.run_id }}
         run: bin/rake
diff --git a/Gemfile b/Gemfile
index 4c07fb6..61f1b84 100644
--- a/Gemfile
+++ b/Gemfile
@@ -4,9 +4,3 @@ source 'https://rubygems.org'
 
 gemspec
 
-platform :mri do
-  group :development do
-    gem 'bump', '~> 0.10.0'
-    gem 'github_changelog_generator', '~> 1.16'
-  end
-end
diff --git a/Rakefile b/Rakefile
index e93b025..09df4e2 100644
--- a/Rakefile
+++ b/Rakefile
@@ -8,8 +8,6 @@ RSpec::Core::RakeTask.new(:spec) do |task|
   task.pattern = 'spec/closure_tree/*_spec.rb'
 end
 
-task default: %i[spec test]
-
 namespace :spec do
   desc 'Run all spec variants'
   task :all do
@@ -29,14 +27,4 @@ Rake::TestTask.new do |t|
   t.verbose = true
 end
 
-if RUBY_ENGINE == 'ruby'
-  require 'github_changelog_generator/task'
-  GitHubChangelogGenerator::RakeTask.new :changelog do |config|
-    config.user = 'ClosureTree'
-    config.project = 'closure_tree'
-    config.issues = false
-    config.future_release = '5.2.0'
-    config.since_tag = 'v7.4.0'
-  end
-end
-task default: 'spec:all'
+task default: %i[spec:all test]