diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
new file mode 100644
index 0000000..c4a5586
--- /dev/null
+++ b/.github/workflows/test.yml
@@ -0,0 +1,41 @@
+
+name: is_dark
+
+on: [push, pull_request]
+
+jobs:
+  test:
+    strategy:
+      matrix:
+        os: ['ubuntu-20.04']
+        ruby:
+          - 3.0
+          - 3.1
+          - 3.2
+          - 3.3
+          - head
+
+    runs-on: ${{ matrix.os }}
+    continue-on-error: true
+
+    steps:
+      - name: Change ImageMagick policy to allow pdf->png conversion.
+        run: sudo sed -i 's/^.*policy.*coder.*none.*PDF.*//' /etc/ImageMagick-6/policy.xml
+
+      - name: Install Ghostscript
+        run: sudo apt-get install -y ghostscript
+      
+      - uses: actions/checkout@v4
+
+      - uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: ${{ matrix.ruby }}
+
+      - name: Install dependencies
+        run: bundle install
+
+      - name: Display Ruby version
+        run: ruby -v
+
+      - name: Test
+        run: bundle exec rspec
diff --git a/.rspec b/.rspec
new file mode 100644
index 0000000..c99d2e7
--- /dev/null
+++ b/.rspec
@@ -0,0 +1 @@
+--require spec_helper
diff --git a/Gemfile b/Gemfile
index 7fcf3c2..6c5845c 100644
--- a/Gemfile
+++ b/Gemfile
@@ -2,5 +2,8 @@ source "https://rubygems.org"
 git_source(:github) { |repo| "https://github.com/butteff/is_dark_ruby_gem.git" }
 
 gem "rmagick"
-gem "rspec"
-gem "minitest"
\ No newline at end of file
+
+group  :development, :test do
+  gem "rspec"
+  gem "minitest"
+end
diff --git a/is_dark.gemspec b/is_dark.gemspec
index 8544193..2016483 100644
--- a/is_dark.gemspec
+++ b/is_dark.gemspec
@@ -12,5 +12,6 @@ Gem::Specification.new do |s|
   s.metadata    = { "source_code_uri" => "https://github.com/butteff/is_dark_ruby_gem" }
   s.required_ruby_version = '>= 2.7.0'
   s.add_dependency 'rmagick', '~> 5.2'
-  #s.add_development_dependency 'rmagick', '~> 5.2'
-end
\ No newline at end of file
+  s.add_development_dependency 'rspec', "~> 3.13"
+  s.add_development_dependency 'minitest', "~> 5.16"
+end
diff --git a/spec/test_is_dark.rb b/spec/lib/is_dark_spec.rb
similarity index 94%
rename from spec/test_is_dark.rb
rename to spec/lib/is_dark_spec.rb
index 7fb9422..d6c4c22 100644
--- a/spec/test_is_dark.rb
+++ b/spec/lib/is_dark_spec.rb
@@ -1,28 +1,28 @@
-require "rspec"
 require "rmagick"
-require "../lib/is_dark.rb"
+require 'spec_helper'
+require_relative '../../lib/is_dark'
 
-TEST_FILE_PATH = '../color_card.pdf'
+TEST_FILE_PATH = 'color_card.pdf'
 
 describe IsDark do
-  
+
   describe ".color" do
     context "dark colors tests" do
       it "this color #000000 is dark, returns true" do
         expect(IsDark.color('#000000')).to eq(true)
       end
-   
+
       it "this color #111111 is dark, returns true" do
         expect(IsDark.color('#111111')).to eq(true)
       end
 
       it "this color #102694 is dark, returns true" do
         expect(IsDark.color('#102694')).to eq(true)
-      end 
+      end
 
       it "this color #ff2e17 is dark, returns true" do
         expect(IsDark.color('#800f03')).to eq(true)
-      end 
+      end
     end
 
     context "not dark colors tests" do
@@ -50,15 +50,15 @@
         x = 120
         y = 120
         expect(IsDark.magick_pixel_from_blob(x, y, TEST_FILE_PATH)).to eq(true)
-      end 
-    end 
+      end
+    end
 
     context "test not dark pixel" do
       it "this pixel is not dark, returns false" do
         x = 720
         y = 120
         expect(IsDark.magick_pixel_from_blob(x, y, TEST_FILE_PATH)).to eq(false)
-      end 
+      end
     end
   end
 
@@ -68,22 +68,22 @@
         image = Magick::Image.read(TEST_FILE_PATH).first
         pix = image.pixel_color(80, 320)
         expect(IsDark.magick_pixel(pix)).to eq(true)
-      end 
-    end 
+      end
+    end
 
     context "test not dark pixel" do
       it "this pixel is not dark, returns false" do
         image = Magick::Image.read(TEST_FILE_PATH).first
         pix = image.pixel_color(720, 120)
         expect(IsDark.magick_pixel(pix)).to eq(false)
-      end 
+      end
     end
   end
 
   describe ".magick_area_from_blob" do
     context "test dark area" do
       it "this area is dark, returns true" do
-        x = 120 #coordinate of a left corner of the area's rectangle X 
+        x = 120 #coordinate of a left corner of the area's rectangle X
         y = 120 #coordinate of a left corner of the area's rectangle Y
         cf_height = 64 #height of the area's rectangle
         cf_width = 128 #height of the area's rectangle
@@ -91,12 +91,12 @@
         matrix = (1..10) #matrix of dots. Range of matrix to build dots 1..10 - means 10x10
         with_not_detected = false #Sometimes Imagick can't detect a pixel or it has no color, so it detects it as (RGB: 0,0,0), the gem has an option to consider pixels like this as "white", but if you need to disable this option add true or false
         expect(IsDark.magick_area_from_blob(x, y, TEST_FILE_PATH, cf_height, cf_width, percent, matrix, with_not_detected)).to eq(false)
-      end 
-    end 
+      end
+    end
 
     context "test bright area" do
       it "this area is not dark, returns false" do
-        x = 720 #coordinate of a left corner of the area's rectangle X 
+        x = 720 #coordinate of a left corner of the area's rectangle X
         y = 120 #coordinate of a left corner of the area's rectangle Y
         cf_height = 64 #height of the area's rectangle
         cf_width = 128 #height of the area's rectangle
@@ -104,12 +104,12 @@
         matrix = (1..10) #matrix of dots. Range of matrix to build dots 1..10 - means 10x10
         with_not_detected = false #Sometimes Imagick can't detect a pixel or it has no color, so it detects it as (RGB: 0,0,0), the gem has an option to consider pixels like this as "white", but if you need to disable this option add true or false
         expect(IsDark.magick_area_from_blob(x, y, TEST_FILE_PATH, cf_height, cf_width, percent, matrix, with_not_detected)).to eq(false)
-      end 
-    end 
+      end
+    end
 
     context "test debug output" do
       it "test area with logs and debug file" do
-        x = 120 #coordinate of a left corner of the area's rectangle X 
+        x = 120 #coordinate of a left corner of the area's rectangle X
         y = 120 #coordinate of a left corner of the area's rectangle Y
         cf_height = 64 #height of the area's rectangle
         cf_width = 128 #height of the area's rectangle
@@ -118,8 +118,8 @@
         with_not_detected = false #Sometimes Imagick can't detect a pixel or it has no color, so it detects it as (RGB: 0,0,0), the gem has an option to consider pixels like this as "white", but if you need to disable this option add true or false
         IsDark.set_debug_data(true, './is_dark_debug_output.pdf')
         expect(IsDark.magick_area_from_blob(x, y, TEST_FILE_PATH, cf_height, cf_width, percent, matrix, with_not_detected)).to eq(false)
-      end 
-    end 
+      end
+    end
   end
 
-end
\ No newline at end of file
+end
diff --git a/spec/spec_helper.rb b/spec/spec_helper.rb
new file mode 100644
index 0000000..7388169
--- /dev/null
+++ b/spec/spec_helper.rb
@@ -0,0 +1,92 @@
+
+# This file was generated by the `rspec --init` command. Conventionally, all
+# specs live under a `spec` directory, which RSpec adds to the `$LOAD_PATH`.
+# The generated `.rspec` file contains `--require spec_helper` which will cause
+# this file to always be loaded, without a need to explicitly require it in any
+# files.
+#
+# Given that it is always loaded, you are encouraged to keep this file as
+# light-weight as possible. Requiring heavyweight dependencies from this file
+# will add to the boot time of your test suite on EVERY test run, even for an
+# individual file that may not need all of that loaded. Instead, consider making
+# a separate helper file that requires the additional dependencies and performs
+# the additional setup, and require it from the spec files that actually need
+# it.
+#
+# See https://rubydoc.info/gems/rspec-core/RSpec/Core/Configuration
+RSpec.configure do |config|
+  # rspec-expectations config goes here. You can use an alternate
+  # assertion/expectation library such as wrong or the stdlib/minitest
+  # assertions if you prefer.
+  config.expect_with :rspec do |expectations|
+    # This option will default to `true` in RSpec 4. It makes the `description`
+    # and `failure_message` of custom matchers include text for helper methods
+    # defined using `chain`, e.g.:
+    #     be_bigger_than(2).and_smaller_than(4).description
+    #     # => "be bigger than 2 and smaller than 4"
+    # ...rather than:
+    #     # => "be bigger than 2"
+    expectations.include_chain_clauses_in_custom_matcher_descriptions = true
+  end
+
+  # rspec-mocks config goes here. You can use an alternate test double
+  # library (such as bogus or mocha) by changing the `mock_with` option here.
+  config.mock_with :rspec do |mocks|
+    # Prevents you from mocking or stubbing a method that does not exist on
+    # a real object. This is generally recommended, and will default to
+    # `true` in RSpec 4.
+    mocks.verify_partial_doubles = true
+  end
+
+  # This option will default to `:apply_to_host_groups` in RSpec 4 (and will
+  # have no way to turn it off -- the option exists only for backwards
+  # compatibility in RSpec 3). It causes shared context metadata to be
+  # inherited by the metadata hash of host groups and examples, rather than
+  # triggering implicit auto-inclusion in groups with matching metadata.
+  config.shared_context_metadata_behavior = :apply_to_host_groups
+
+# The settings below are suggested to provide a good initial experience
+# with RSpec, but feel free to customize to your heart's content.
+=begin
+  # This allows you to limit a spec run to individual examples or groups
+  # you care about by tagging them with `:focus` metadata. When nothing
+  # is tagged with `:focus`, all examples get run. RSpec also provides
+  # aliases for `it`, `describe`, and `context` that include `:focus`
+  # metadata: `fit`, `fdescribe` and `fcontext`, respectively.
+  config.filter_run_when_matching :focus
+  # Allows RSpec to persist some state between runs in order to support
+  # the `--only-failures` and `--next-failure` CLI options. We recommend
+  # you configure your source control system to ignore this file.
+  config.example_status_persistence_file_path = "spec/examples.txt"
+  # Limits the available syntax to the non-monkey patched syntax that is
+  # recommended. For more details, see:
+  # https://rspec.info/features/3-12/rspec-core/configuration/zero-monkey-patching-mode/
+  config.disable_monkey_patching!
+  # This setting enables warnings. It's recommended, but in some cases may
+  # be too noisy due to issues in dependencies.
+  config.warnings = true
+  # Many RSpec users commonly either run the entire suite or an individual
+  # file, and it's useful to allow more verbose output when running an
+  # individual spec file.
+  if config.files_to_run.one?
+    # Use the documentation formatter for detailed output,
+    # unless a formatter has already been configured
+    # (e.g. via a command-line flag).
+    config.default_formatter = "doc"
+  end
+  # Print the 10 slowest examples and example groups at the
+  # end of the spec run, to help surface which specs are running
+  # particularly slow.
+  config.profile_examples = 10
+  # Run specs in random order to surface order dependencies. If you find an
+  # order dependency and want to debug it, you can fix the order by providing
+  # the seed, which is printed after each run.
+  #     --seed 1234
+  config.order = :random
+  # Seed global randomization in this process using the `--seed` CLI option.
+  # Setting this allows you to use `--seed` to deterministically reproduce
+  # test failures related to randomization by passing the same `--seed` value
+  # as the one that triggered the failure.
+  Kernel.srand config.seed
+=end
+end