diff --git a/CHANGELOG.md b/CHANGELOG.md
index 2901a48..35c5b98 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,11 @@
+## [1.6.0](https://github.com/shivam091/unit_measurements-rails/compare/v1.5.0...v1.6.0) - 2023-12-10
+
+### What's new
+
+- Added tests for `measured_*` methods.
+
+-----------
+
 ## [1.5.0](https://github.com/shivam091/unit_measurements-rails/compare/v1.4.0...v1.5.0) - 2023-11-27
 
 ### What's new
diff --git a/Gemfile.lock b/Gemfile.lock
index 222781b..188f4b6 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,7 +1,7 @@
 PATH
   remote: .
   specs:
-    unit_measurements-rails (1.5.0)
+    unit_measurements-rails (1.6.0)
       activemodel (>= 7)
       activerecord (>= 7)
       railties (>= 7)
diff --git a/README.md b/README.md
index 2e9113f..4e892b9 100644
--- a/README.md
+++ b/README.md
@@ -14,7 +14,7 @@ A Rails adaptor that encapsulate measurements and their units in Ruby on Rails.
 ## Introduction
 
 This gem is designed as a Rails integration for the [unit_measurements](https://github.com/shivam091/unit_measurements) gem.
-It provides an `ActiveRecord` adapter for persisting and retrieving measurements along with their units, simplifying complex
+It provides an `ActiveRecord` adapter for persisting and retrieving measurement quantity along with its unit, simplifying complex
 measurement handling within your Rails applications.
 
 ## Minimum Requirements
@@ -42,8 +42,8 @@ Or otherwise simply install it yourself as:
 
 ### ActiveRecord
 
-This gem provides an ActiveRecord integration allowing you to declare measurement attributes with their
-corresponding units in your database schema:
+This gem provides an ActiveRecord integration allowing you to declare measurement
+attributes along with their corresponding units in your database schema:
 
 ```ruby
 class CreateCubes < ActiveRecord::Migration[7.0]
@@ -76,6 +76,9 @@ cube.length_unit       #=> "ft"
 cube.length            #=> 5.0 ft
 ```
 
+Attribute accessor names are expected to have the `_quantity` and `_unit` suffix,
+and be `DECIMAL` and `VARCHAR` types, respectively, and defaults values are accepted.
+
 You can specify multiple measurement attributes simultaneously:
 
 ```ruby
@@ -84,28 +87,36 @@ class Cube < ActiveRecord::Base
 end
 ```
 
-Attribute names are expected to have the `_quantity` and `_unit` suffix, and be
-`DECIMAL` and `VARCHAR` types, respectively, and defaults values are accepted.
-
-You can customize the model's quantity and unit accessors by specifying them in the
-`quantity_attribute_name` and `unit_attribute_name` options, respectively.
+You can customize the quantity and unit accessors of the measurement attribute by
+specifying them in the `quantity_attribute_name` and `unit_attribute_name` options,
+respectively.
 
 ```ruby
 class CubeWithCustomAccessor < ActiveRecord::Base
-  measured_length :length, unit_attribute_name: :length_uom
-  measured_length :width, quantity_attribute_name: :width_value
+  measured UnitMeasurements::Length, :length, :width, :height, unit_attribute_name: :size_uom
+  measured UnitMeasurements::Weight, :weight, quantity_attribute_name: :width_quantity
 end
 ```
 
 For a more streamlined approach, predefined methods are available for commonly used
-types like `length`, `weight`, `area`, `volume`, etc.:
+types:
+
+| # | Unit group | Method name |
+| :- | :---------- | :----------- |
+| 1 | Length or distance | measured_length |
+| 2 | Weight or mass | measured_weight |
+| 3 | Time or duration | measured_time |
+| 4 | Temperature | measured_temperature |
+| 5 | Area | measured_area |
+| 6 | Volume | measured_volume |
+| 7 | Density | measured_density |
 
 ```ruby
-class Package < ActiveRecord::Base
+class CubeWithPredefinedMethods < ActiveRecord::Base
   measured_length :size
-  measured_area :carpet_area
-  measured_volume :total_volume
-  measured_weight :item_weight, :package_weight
+  measured_volume :volume
+  measured_weight :weight
+  measured_density :density
 end
 ```
 
@@ -121,4 +132,4 @@ Contributions to this project are welcomed! To contribute:
 
 ## License
 
-Copyright 2023 [Harshal V. LADHE]((https://shivam091.github.io)), Released under the [MIT License](http://opensource.org/licenses/MIT).
+Copyright 2023 [Harshal V. LADHE](https://shivam091.github.io), Released under the [MIT License](http://opensource.org/licenses/MIT).
diff --git a/lib/unit_measurements/rails/version.rb b/lib/unit_measurements/rails/version.rb
index 92c4357..9e31dc7 100644
--- a/lib/unit_measurements/rails/version.rb
+++ b/lib/unit_measurements/rails/version.rb
@@ -5,6 +5,6 @@
 module UnitMeasurements
   module Rails
     # Current stable version.
-    VERSION = "1.5.0"
+    VERSION = "1.6.0"
   end
 end
diff --git a/spec/spec_helper.rb b/spec/spec_helper.rb
index 79e3e82..8641a36 100644
--- a/spec/spec_helper.rb
+++ b/spec/spec_helper.rb
@@ -38,3 +38,6 @@
 # Establish connection to the database and dump database.
 ActiveRecord::Base.establish_connection adapter: "sqlite3", database: ":memory:"
 require_relative "support/schema.rb"
+
+# Load shared examples
+require_relative "support/shared_examples"
diff --git a/spec/support/models/container.rb b/spec/support/models/container.rb
deleted file mode 100644
index c67656c..0000000
--- a/spec/support/models/container.rb
+++ /dev/null
@@ -1,9 +0,0 @@
-# -*- encoding: utf-8 -*-
-# -*- frozen_string_literal: true -*-
-# -*- warn_indent: true -*-
-
-class Container < ActiveRecord::Base
-  measured UnitMeasurements::Volume, :total_volume
-
-  measured_volume :internal_volume, :external_volume
-end
diff --git a/spec/support/models/land.rb b/spec/support/models/land.rb
deleted file mode 100644
index bed40fd..0000000
--- a/spec/support/models/land.rb
+++ /dev/null
@@ -1,9 +0,0 @@
-# -*- encoding: utf-8 -*-
-# -*- frozen_string_literal: true -*-
-# -*- warn_indent: true -*-
-
-class Land < ActiveRecord::Base
-  measured UnitMeasurements::Area, :total_area
-
-  measured_area :carpet_area, :buildup_area
-end
diff --git a/spec/support/models/package.rb b/spec/support/models/package.rb
deleted file mode 100644
index e89445c..0000000
--- a/spec/support/models/package.rb
+++ /dev/null
@@ -1,9 +0,0 @@
-# -*- encoding: utf-8 -*-
-# -*- frozen_string_literal: true -*-
-# -*- warn_indent: true -*-
-
-class Package < ActiveRecord::Base
-  measured UnitMeasurements::Weight, :total_weight
-
-  measured_weight :item_weight, :package_weight
-end
diff --git a/spec/support/models/project_timeline.rb b/spec/support/models/project_timeline.rb
deleted file mode 100644
index cce9db9..0000000
--- a/spec/support/models/project_timeline.rb
+++ /dev/null
@@ -1,9 +0,0 @@
-# -*- encoding: utf-8 -*-
-# -*- frozen_string_literal: true -*-
-# -*- warn_indent: true -*-
-
-class ProjectTimeline < ActiveRecord::Base
-  measured UnitMeasurements::Time, :duration
-
-  measured_time :setup_time, :processing_time
-end
diff --git a/spec/support/models/substance.rb b/spec/support/models/substance.rb
deleted file mode 100644
index cdbf666..0000000
--- a/spec/support/models/substance.rb
+++ /dev/null
@@ -1,9 +0,0 @@
-# -*- encoding: utf-8 -*-
-# -*- frozen_string_literal: true -*-
-# -*- warn_indent: true -*-
-
-class Substance < ActiveRecord::Base
-  measured UnitMeasurements::Density, :total_density
-
-  measured_density :internal_density, :external_density
-end
diff --git a/spec/support/models/weather_report.rb b/spec/support/models/weather_report.rb
deleted file mode 100644
index e4f689f..0000000
--- a/spec/support/models/weather_report.rb
+++ /dev/null
@@ -1,9 +0,0 @@
-# -*- encoding: utf-8 -*-
-# -*- frozen_string_literal: true -*-
-# -*- warn_indent: true -*-
-
-class WeatherReport < ActiveRecord::Base
-  measured UnitMeasurements::Temperature, :average_temperature
-
-  measured_temperature :day_temperature, :night_temperature
-end
diff --git a/spec/support/schema.rb b/spec/support/schema.rb
index fa6bf7a..322c6b8 100644
--- a/spec/support/schema.rb
+++ b/spec/support/schema.rb
@@ -10,7 +10,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 1) do
+ActiveRecord::Schema.define(version: 2) do
   create_table "cubes", force: :cascade do |t|
     t.decimal "length_quantity", precision: 10, scale: 2
     t.string "length_unit", limit: 12
@@ -28,58 +28,4 @@
     t.decimal "height_value", precision: 10, scale: 2
     t.string "height_uom", limit: 12
   end
-
-  create_table "containers", force: :cascade do |t|
-    t.decimal "total_volume_quantity", precision: 10, scale: 2
-    t.string "total_volume_unit", limit: 12
-    t.decimal "internal_volume_quantity", precision: 10, scale: 2
-    t.string "internal_volume_unit", limit: 12
-    t.decimal "external_volume_quantity", precision: 10, scale: 2
-    t.string "external_volume_unit", limit: 12
-  end
-
-  create_table "lands", force: :cascade do |t|
-    t.decimal "total_area_quantity", precision: 10, scale: 2
-    t.string "total_area_unit", limit: 12
-    t.decimal "carpet_area_quantity", precision: 10, scale: 2
-    t.string "carpet_area_unit", limit: 12
-    t.decimal "buildup_area_quantity", precision: 10, scale: 2
-    t.string "buildup_area_unit", limit: 12
-  end
-
-  create_table "packages", force: :cascade do |t|
-    t.decimal "total_weight_quantity", precision: 10, scale: 2
-    t.string "total_weight_unit", limit: 12
-    t.decimal "item_weight_quantity", precision: 10, scale: 2
-    t.string "item_weight_unit", limit: 12
-    t.decimal "package_weight_quantity", precision: 10, scale: 2
-    t.string "package_weight_unit", limit: 12
-  end
-
-  create_table "substances", force: :cascade do |t|
-    t.decimal "total_density_quantity", precision: 10, scale: 2
-    t.string "total_density_unit", limit: 12
-    t.decimal "internal_density_quantity", precision: 10, scale: 2
-    t.string "internal_density_unit", limit: 12
-    t.decimal "external_density_quantity", precision: 10, scale: 2
-    t.string "external_density_unit", limit: 12
-  end
-
-  create_table "weather_reports", force: :cascade do |t|
-    t.decimal "average_temperature_quantity", precision: 10, scale: 2
-    t.string "average_temperature_unit", limit: 12
-    t.decimal "day_temperature_quantity", precision: 10, scale: 2
-    t.string "day_temperature_unit", limit: 12
-    t.decimal "night_temperature_quantity", precision: 10, scale: 2
-    t.string "night_temperature_unit", limit: 12
-  end
-
-  create_table "project_timelines", force: :cascade do |t|
-    t.decimal "duration_quantity", precision: 10, scale: 2
-    t.string "duration_unit", limit: 12
-    t.decimal "setup_time_quantity", precision: 10, scale: 2
-    t.string "setup_time_unit", limit: 12
-    t.decimal "processing_time_quantity", precision: 10, scale: 2
-    t.string "processing_time_unit", limit: 12
-  end
 end
diff --git a/spec/support/shared_examples.rb b/spec/support/shared_examples.rb
new file mode 100644
index 0000000..90ae0b6
--- /dev/null
+++ b/spec/support/shared_examples.rb
@@ -0,0 +1,65 @@
+# -*- encoding: utf-8 -*-
+# -*- frozen_string_literal: true -*-
+# -*- warn_indent: true -*-
+
+# spec/unit_measurements/shared_examples.rb
+
+RSpec.shared_examples "measured method" do |unit_group, method_name|
+  let!(:mock_model) { Class.new(ActiveRecord::Base) }
+
+  it "responds to .#{method_name}" do
+    expect(mock_model).to respond_to(method_name)
+  end
+
+  describe ".#{method_name}" do
+    it "defines single measurement attribute" do
+      mock_model.public_send(method_name, :attribute)
+
+      expect_attribute_definition("attribute", unit_group, "attribute_quantity", "attribute_unit")
+    end
+
+    it "defines multiple measurement attributes" do
+      mock_model.public_send(method_name, :attribute1, :attribute2)
+
+      expect_attribute_definition("attribute1", unit_group, "attribute1_quantity", "attribute1_unit")
+      expect_attribute_definition("attribute2", unit_group, "attribute2_quantity", "attribute2_unit")
+    end
+
+    it "accepts string or symbol for measurement attribute name" do
+      mock_model.public_send(method_name, "string_attr", :symbol_attr)
+
+      expect_attribute_definition("string_attr", unit_group, "string_attr_quantity", "string_attr_unit")
+      expect_attribute_definition("symbol_attr", unit_group, "symbol_attr_quantity", "symbol_attr_unit")
+    end
+
+    it "accepts quantity_attribute_name and unit_attribute_name options" do
+      mock_model.public_send(method_name, :attribute1, quantity_attribute_name: :custom_quantity, unit_attribute_name: :custom_unit)
+
+      expect_attribute_definition("attribute1", unit_group, "custom_quantity", "custom_unit")
+    end
+
+    it "accepts string or symbol for quantity_attribute_name and unit_attribute_name options" do
+      mock_model.public_send(method_name, :attribute1, quantity_attribute_name: "custom_quantity", unit_attribute_name: :custom_unit)
+
+      expect_attribute_definition("attribute1", unit_group, "custom_quantity", "custom_unit")
+    end
+
+    it "allows using both quantity_attribute_name and unit_attribute_name options simultaneously" do
+      mock_model.public_send(method_name, :attribute1, quantity_attribute_name: :custom_quantity, unit_attribute_name: :custom_unit)
+
+      expect_attribute_definition("attribute1", unit_group, "custom_quantity", "custom_unit")
+    end
+  end
+
+  private
+
+  def expect_attribute_definition(attribute, unit_group, quantity_attribute_name, unit_attribute_name)
+    expect(mock_model.measured_attributes).to have_key(attribute)
+
+    attribute_info = mock_model.measured_attributes[attribute]
+
+    expect(attribute_info[:unit_group]).to eq(unit_group)
+    expect(attribute_info[:quantity_attribute_name]).to eq(quantity_attribute_name)
+    expect(attribute_info[:unit_attribute_name]).to eq(unit_attribute_name)
+  end
+end
diff --git a/spec/unit_measurements/rails/unit_groups/area_spec.rb b/spec/unit_measurements/rails/unit_groups/area_spec.rb
new file mode 100644
index 0000000..dcefb8a
--- /dev/null
+++ b/spec/unit_measurements/rails/unit_groups/area_spec.rb
@@ -0,0 +1,9 @@
+# -*- encoding: utf-8 -*-
+# -*- frozen_string_literal: true -*-
+# -*- warn_indent: true -*-
+
+# spec/unit_measurements/rails/unit_groups/area_spec.rb
+
+RSpec.describe UnitMeasurements::Rails::ActiveRecord::Area do
+  include_examples "measured method", UnitMeasurements::Area, :measured_area
+end
diff --git a/spec/unit_measurements/rails/unit_groups/density_spec.rb b/spec/unit_measurements/rails/unit_groups/density_spec.rb
new file mode 100644
index 0000000..414dd18
--- /dev/null
+++ b/spec/unit_measurements/rails/unit_groups/density_spec.rb
@@ -0,0 +1,9 @@
+# -*- encoding: utf-8 -*-
+# -*- frozen_string_literal: true -*-
+# -*- warn_indent: true -*-
+
+# spec/unit_measurements/rails/unit_groups/density_spec.rb
+
+RSpec.describe UnitMeasurements::Rails::ActiveRecord::Density do
+  include_examples "measured method", UnitMeasurements::Density, :measured_density
+end
diff --git a/spec/unit_measurements/rails/unit_groups/length_spec.rb b/spec/unit_measurements/rails/unit_groups/length_spec.rb
new file mode 100644
index 0000000..353a707
--- /dev/null
+++ b/spec/unit_measurements/rails/unit_groups/length_spec.rb
@@ -0,0 +1,9 @@
+# -*- encoding: utf-8 -*-
+# -*- frozen_string_literal: true -*-
+# -*- warn_indent: true -*-
+
+# spec/unit_measurements/rails/unit_groups/length_spec.rb
+
+RSpec.describe UnitMeasurements::Rails::ActiveRecord::Length do
+  include_examples "measured method", UnitMeasurements::Length, :measured_length
+end
diff --git a/spec/unit_measurements/rails/unit_groups/temperature_spec.rb b/spec/unit_measurements/rails/unit_groups/temperature_spec.rb
new file mode 100644
index 0000000..8048ae8
--- /dev/null
+++ b/spec/unit_measurements/rails/unit_groups/temperature_spec.rb
@@ -0,0 +1,9 @@
+# -*- encoding: utf-8 -*-
+# -*- frozen_string_literal: true -*-
+# -*- warn_indent: true -*-
+
+# spec/unit_measurements/rails/unit_groups/temperature_spec.rb
+
+RSpec.describe UnitMeasurements::Rails::ActiveRecord::Temperature do
+  include_examples "measured method", UnitMeasurements::Temperature, :measured_temperature
+end
diff --git a/spec/unit_measurements/rails/unit_groups/time_spec.rb b/spec/unit_measurements/rails/unit_groups/time_spec.rb
new file mode 100644
index 0000000..9a2f097
--- /dev/null
+++ b/spec/unit_measurements/rails/unit_groups/time_spec.rb
@@ -0,0 +1,9 @@
+# -*- encoding: utf-8 -*-
+# -*- frozen_string_literal: true -*-
+# -*- warn_indent: true -*-
+
+# spec/unit_measurements/rails/unit_groups/time_spec.rb
+
+RSpec.describe UnitMeasurements::Rails::ActiveRecord::Time do
+  include_examples "measured method", UnitMeasurements::Time, :measured_time
+end
diff --git a/spec/unit_measurements/rails/unit_groups/volume_spec.rb b/spec/unit_measurements/rails/unit_groups/volume_spec.rb
new file mode 100644
index 0000000..e66c71d
--- /dev/null
+++ b/spec/unit_measurements/rails/unit_groups/volume_spec.rb
@@ -0,0 +1,9 @@
+# -*- encoding: utf-8 -*-
+# -*- frozen_string_literal: true -*-
+# -*- warn_indent: true -*-
+
+# spec/unit_measurements/rails/unit_groups/volume_spec.rb
+
+RSpec.describe UnitMeasurements::Rails::ActiveRecord::Volume do
+  include_examples "measured method", UnitMeasurements::Volume, :measured_volume
+end
diff --git a/spec/unit_measurements/rails/unit_groups/weight_spec.rb b/spec/unit_measurements/rails/unit_groups/weight_spec.rb
new file mode 100644
index 0000000..f039565
--- /dev/null
+++ b/spec/unit_measurements/rails/unit_groups/weight_spec.rb
@@ -0,0 +1,9 @@
+# -*- encoding: utf-8 -*-
+# -*- frozen_string_literal: true -*-
+# -*- warn_indent: true -*-
+
+# spec/unit_measurements/rails/unit_groups/weight_spec.rb
+
+RSpec.describe UnitMeasurements::Rails::ActiveRecord::Weight do
+  include_examples "measured method", UnitMeasurements::Weight, :measured_weight
+end