diff --git a/.github/workflows/ruby.yml b/.github/workflows/ruby.yml
new file mode 100644
index 0000000..a437088
--- /dev/null
+++ b/.github/workflows/ruby.yml
@@ -0,0 +1,79 @@
+name: Tests
+
+on: [push, pull_request]
+
+jobs:
+  test:
+    name: Test on Ruby ${{ matrix.ruby-version }} / Active Record ${{ matrix.rails }}
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        ruby-version: [ '2.7', '3.0', '3.1']
+        rails: ['5_0', '5_1', '5_2', '6_0', '6_1', '7_0']  
+        exclude:
+          # exclude unsupported ruby versions: https://github.com/rails/rails/issues/40938
+          - ruby-version: '3.0'
+            rails: '5_0'
+          - ruby-version: '3.0'
+            rails: '5_1'
+          - ruby-version: '3.0'
+            rails: '5_2'
+          - ruby-version: '3.1'
+            rails: '5_0'
+          - ruby-version: '3.1'
+            rails: '5_1'
+          - ruby-version: '3.1'
+            rails: '5_2'
+
+    env:
+      TESTING_RAILS_VERSION: ${{ matrix.rails }}
+      BUNDLE_GEMFILE: ${{ github.workspace }}/gemfiles/activerecord_${{ matrix.rails }}.gemfile
+
+    services:
+      postgres:
+        image: postgres
+        env:
+          POSTGRES_USER: crypt_keeper
+          POSTGRES_PASSWORD: crypt_keeper
+          POSTGRES_DB: crypt_keeper_providers
+        options: >-
+          --health-cmd pg_isready
+          --health-interval 10s
+          --health-timeout 5s
+          --health-retries 5   
+        ports:
+          - 5432:5432
+      mysql:
+        image: mysql:5.7
+        env:
+          MYSQL_DATABASE: crypt_keeper_providers
+          MYSQL_USER: crypt_keeper
+          MYSQL_PASSWORD: crypt_keeper
+          MYSQL_ROOT_PASSWORD: rootpassword
+        ports:
+          - 33306:3306
+        options: --health-cmd="mysqladmin ping" --health-interval=10s --health-timeout=5s --health-retries=3      
+    
+    steps:
+      - uses: actions/checkout@v2
+    
+      - name: Setup System
+        run: sudo apt-get install libsqlite3-dev
+
+      - name: Set up Ruby
+        uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: ${{ matrix.ruby-version }}
+          bundler-cache: true
+                  
+      - name: Copy database config
+        run: |
+          cp spec/github_actions.database.yml spec/database.yml
+
+      - name: Enable pgcrypto extension
+        run: |
+          PGPASSWORD=crypt_keeper psql crypt_keeper_providers -h localhost -p 5432 -U crypt_keeper -tc "CREATE EXTENSION IF NOT EXISTS pgcrypto;"
+    
+      - name: Run tests
+        run: bundle exec rake
diff --git a/Appraisals b/Appraisals
index 27bcb12..aff8851 100644
--- a/Appraisals
+++ b/Appraisals
@@ -11,7 +11,7 @@ appraise "activerecord_5_0" do
   gem "activerecord",  "~> 5.0.0"
   gem "activesupport", "~> 5.0.0"
 
-  gem "sqlite3", "~> 1.3.6"
+  gem "sqlite3", "~> 1.3.11"
 end
 
 appraise "activerecord_5_1" do
diff --git a/Rakefile b/Rakefile
index f899090..f1cc2a1 100644
--- a/Rakefile
+++ b/Rakefile
@@ -6,7 +6,7 @@ require "appraisal"
 RSpec::Core::RakeTask.new :spec
 Bundler::GemHelper.install_tasks
 
-if !ENV["APPRAISAL_INITIALIZED"] && !ENV["TRAVIS"]
+if !ENV["APPRAISAL_INITIALIZED"] && !ENV["TRAVIS"] && !ENV["GITHUB_ACTIONS"]
   task default: :appraisal
 else
   task default: :spec
diff --git a/crypt_keeper.gemspec b/crypt_keeper.gemspec
index 6654574..c742ebd 100644
--- a/crypt_keeper.gemspec
+++ b/crypt_keeper.gemspec
@@ -26,7 +26,7 @@ Gem::Specification.new do |gem|
   gem.add_development_dependency 'guard-rspec', '~> 4.2.9'
   gem.add_development_dependency 'rake'
   gem.add_development_dependency 'rb-fsevent',  '~> 0.9.1'
-  gem.add_development_dependency 'coveralls'
+  gem.add_development_dependency 'coveralls_reborn'
   gem.add_development_dependency 'appraisal',   '~> 2.1.0'
 
   if RUBY_PLATFORM == 'java'
diff --git a/gemfiles/activerecord_5_0.gemfile b/gemfiles/activerecord_5_0.gemfile
index 993e2f3..42f1499 100644
--- a/gemfiles/activerecord_5_0.gemfile
+++ b/gemfiles/activerecord_5_0.gemfile
@@ -4,6 +4,6 @@ source "https://rubygems.org"
 
 gem "activerecord", "~> 5.0.0"
 gem "activesupport", "~> 5.0.0"
-gem "sqlite3", "~> 1.3.6"
+gem "sqlite3", "~> 1.3.11"
 
 gemspec :path => "../"
diff --git a/lib/crypt_keeper/model.rb b/lib/crypt_keeper/model.rb
index 2a1a491..7a18ed1 100644
--- a/lib/crypt_keeper/model.rb
+++ b/lib/crypt_keeper/model.rb
@@ -119,6 +119,9 @@ def decrypt_table!
       # Private: The encryptor class
       def encryptor_klass
         @encryptor_klass ||= "CryptKeeper::Provider::#{crypt_keeper_encryptor.to_s.camelize}".constantize
+      rescue NameError
+        # couldn’t constantize... 
+        nil
       end
 
       # Private: The encryptor instance.
diff --git a/spec/github_actions.database.yml b/spec/github_actions.database.yml
new file mode 100644
index 0000000..88a26b5
--- /dev/null
+++ b/spec/github_actions.database.yml
@@ -0,0 +1,25 @@
+postgres:
+  adapter: postgresql
+  encoding: utf8
+  reconnect: false
+  host: localhost
+  database: crypt_keeper_providers
+  pool: 5
+  username: crypt_keeper
+  password: crypt_keeper
+  min_messages: WARNING
+mysql:
+  adapter: mysql2
+  encoding: utf8
+  reconnect: false
+  database: crypt_keeper_providers
+  pool: 5
+  host: 127.0.0.1
+  port: 33306
+  username: crypt_keeper
+  password: crypt_keeper
+sqlite:
+  adapter: sqlite3
+  encoding: utf8
+  reconnect: false
+  database: ':memory:'