diff --git a/.github/workflows/macos.yml b/.github/workflows/macos.yml
index e344845..a817641 100644
--- a/.github/workflows/macos.yml
+++ b/.github/workflows/macos.yml
@@ -1,24 +1,24 @@
-# name: MacOS CI Test
+name: MacOS CI Test
 
-# on:
-#   push:
-#     branches: [ main, master, dev ]
-#   pull_request:
-#     branches: [ main, master, dev ]
+on:
+  push:
+    branches: [ main, master, dev ]
+  pull_request:
+    branches: [ main, master, dev ]
 
-# jobs:
-#   build:
-#     runs-on: macos-latest
-#     steps:
-#     - uses: actions/checkout@v2
-#     - name: prepare
-#       run: |
-#         make prepare
-#     - name: configure
-#       run: |
-#         cmake -H. -Bbuild -DCMAKE_BUILD_TYPE="Debug"
-#     - name: building and testing
-#       run: |
-#         cmake --build build --config Debug
-#         cd build
-#         ctest .
+jobs:
+  build:
+    runs-on: macos-latest
+    steps:
+    - uses: actions/checkout@v2
+    - name: prepare
+      run: |
+        make prepare
+    - name: configure
+      run: |
+        cmake -H. -Bbuild -DCMAKE_BUILD_TYPE="Debug"
+    - name: building and testing
+      run: |
+        cmake --build build --config Debug
+        cd build
+        ctest .
diff --git a/.github/workflows/ubuntu.yml b/.github/workflows/ubuntu.yml
index 73acc64..d035f68 100644
--- a/.github/workflows/ubuntu.yml
+++ b/.github/workflows/ubuntu.yml
@@ -1,45 +1,45 @@
-# name: Ubuntu CI Test
+name: Ubuntu CI Test
 
-# on:
-#   push:
-#     branches: [ main, master, dev ]
-#   pull_request:
-#     branches: [ main, master, dev ]
+on:
+  push:
+    branches: [ main, master, dev ]
+  pull_request:
+    branches: [ main, master, dev ]
 
-# jobs:
-#   build:
-#     runs-on: ubuntu-latest
-#     steps:
-#     - uses: actions/checkout@v2
-#     - name: install
-#       run: |
-#         pip install --user -U gcovr
-#     - name: prepare
-#       run: |
-#         make prepare
-#     - name: configure
-#       run: |
-#         cmake -H. -Bbuild -DCMAKE_BUILD_TYPE=Debug -DENABLE_COVERAGE=On
-#     - name: building and testing
-#       run: |
-#         cmake --build build --config Debug --target coverage -j4
-#         cd build
-#         ctest .
-#     - name: Code Coverage Report
-#       uses: irongut/CodeCoverageSummary@v1.3.0
-#       with:
-#         filename: build/coverage/coverage.cobertura.xml
-#         badge: true
-#         fail_below_min: true
-#         format: markdown
-#         hide_branch_rate: false
-#         hide_complexity: true
-#         indicators: true
-#         output: both
-#         thresholds: '60 80'
-#     - name: Add Coverage PR Comment
-#       uses: marocchino/sticky-pull-request-comment@v2
-#       if: github.event_name == 'pull_request'
-#       with:
-#         recreate: true
-#         path: code-coverage-results.md
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v2
+    - name: install
+      run: |
+        pip install --user -U gcovr
+    - name: prepare
+      run: |
+        make prepare
+    - name: configure
+      run: |
+        cmake -H. -Bbuild -DCMAKE_BUILD_TYPE=Debug -DENABLE_COVERAGE=On
+    - name: building and testing
+      run: |
+        cmake --build build --config Debug --target coverage -j4
+        cd build
+        ctest .
+    - name: Code Coverage Report
+      uses: irongut/CodeCoverageSummary@v1.3.0
+      with:
+        filename: build/coverage/coverage.cobertura.xml
+        badge: true
+        fail_below_min: true
+        format: markdown
+        hide_branch_rate: false
+        hide_complexity: true
+        indicators: true
+        output: both
+        thresholds: '60 80'
+    - name: Add Coverage PR Comment
+      uses: marocchino/sticky-pull-request-comment@v2
+      if: github.event_name == 'pull_request'
+      with:
+        recreate: true
+        path: code-coverage-results.md
diff --git a/.github/workflows/windows.yml b/.github/workflows/windows.yml
index a54b9aa..5cce786 100644
--- a/.github/workflows/windows.yml
+++ b/.github/workflows/windows.yml
@@ -1,24 +1,24 @@
-# name: Windows CI Test
+name: Windows CI Test
 
-# on:
-#   push:
-#     branches: [ main, master, dev ]
-#   pull_request:
-#     branches: [ main, master, dev ]
+on:
+  push:
+    branches: [ main, master, dev ]
+  pull_request:
+    branches: [ main, master, dev ]
 
-# jobs:
-#   build:
-#     runs-on: windows-latest
-#     steps:
-#     - uses: actions/checkout@v2
-#     - name: prepare
-#       run: |
-#         make prepare
-#     - name: configure
-#       run: |
-#         cmake -H"." -Bbuild -T host=x86 -A x64 -DCMAKE_BUILD_TYPE="Debug"
-#     - name: building and testing
-#       run: |
-#         cmake --build build --config Debug
-#         cd build
-#         ctest .
+jobs:
+  build:
+    runs-on: windows-latest
+    steps:
+    - uses: actions/checkout@v2
+    - name: prepare
+      run: |
+        make prepare
+    - name: configure
+      run: |
+        cmake -H"." -Bbuild -T host=x86 -A x64 -DCMAKE_BUILD_TYPE="Debug"
+    - name: building and testing
+      run: |
+        cmake --build build --config Debug
+        cd build
+        ctest .
diff --git a/cmake/CodeCoverage.cmake b/cmake/CodeCoverage.cmake
index 6eac0b4..b1bc35d 100644
--- a/cmake/CodeCoverage.cmake
+++ b/cmake/CodeCoverage.cmake
@@ -135,7 +135,8 @@ function(setup_target_for_coverage_gcovr_html)
         --json-summary
         --json-summary-pretty
         --html-theme
-        blue)
+        github.dark-green
+        --gcov-ignore-errors=no_working_dir_found) # ABR added since workflow `.github/workflows/ubuntu.yml` failed
     set(GCOVR_HTML_CMD
         ${GCOVR_PATH}
         ${GCOVR_EXTRA_FLAGS}
@@ -145,10 +146,10 @@ function(setup_target_for_coverage_gcovr_html)
         --json-summary
         ${Coverage_NAME}/summary.json
         --json-summary-pretty
-        # --cobertura
-        # ${Coverage_NAME}/coverage.cobertura.xml
-        # --cobertura-pretty
-        # --decisions
+        --cobertura
+        ${Coverage_NAME}/coverage.cobertura.xml
+        --cobertura-pretty
+        --decisions
         -r
         ${BASEDIR}
         ${GCOVR_ADDITIONAL_ARGS}
diff --git a/notes.md b/notes.md
index 93bb2db..0537fdf 100644
--- a/notes.md
+++ b/notes.md
@@ -85,3 +85,13 @@
     - [Creating an Example Workflow](https://docs.github.com/en/actions/use-cases-and-examples/creating-an-example-workflow)
     - [GitHub Actions](https://github.com/actions) for automate your GitHub workflows
     - [Disable/Enabling workflows](https://docs.github.com/en/actions/managing-workflow-runs-and-deployments/managing-workflow-runs/disabling-and-enabling-a-workflow?tool=webui)
+
+- **GitHub Pull Requests**:
+  - [Git Pull Request](https://www.geeksforgeeks.org/git-pull-request/)
+  - In GitLab is called Merge Request
+
+- **GitHub Actions** for Unit Testing and Code Coverage:
+  - Following workflows:
+    - [MAC OS](.github/workflows/macos.yml)
+    - [Ubuntu](.github/workflows/ubuntu.yml)
+    - [Windows](.github/workflows/windows.yml)