diff --git a/.github/workflows/Parameters.yml b/.github/workflows/Parameters.yml
index 085dc13..5438a09 100644
--- a/.github/workflows/Parameters.yml
+++ b/.github/workflows/Parameters.yml
@@ -33,7 +33,12 @@ on:
       python_version_list:
         description: 'Space separated list of Python versions to run tests with.'
         required: false
-        default: '3.6 3.7 3.8 3.9 3.10'
+        default: '3.7 3.8 3.9 3.10'
+        type: string
+      system_list:
+        description: 'Space separated list of systems to run tests on.'
+        required: false
+        default: 'ubuntu windows msys2 macos'
         type: string
       name:
         description: 'Name of the tool.'
@@ -75,19 +80,39 @@ jobs:
           print("Parameters:")
           print(params)
 
+          systems = '${{ inputs.system_list }}'.split(' ')
           versions = '${{ inputs.python_version_list }}'.split(' ')
           if '3.6' in versions:
-              print('WARNING: support for Python 3.6 ended in 2021.12.23')
+              print("::warning title=Deprecated::Support for Python 3.6 ended in 2021.12.23.")
+          if '3.11' in versions:
+              print(f"::notice title=Experimental::Python 3.11 (3.11.0-alpha3) is a pre-release.")
           data = {
-             '3.6': { 'icon': '⚫', 'until': '2021.12.23' },
-             '3.7': { 'icon': '🔴', 'until': '2023.06.27' },
-             '3.8': { 'icon': '🟠', 'until': '2024.10' },
-             '3.9': { 'icon': '🟡', 'until': '2025.10' },
-            '3.10': { 'icon': '🟢', 'until': '2026.10' },
+              'python': {
+                  '3.6':  { 'icon': '⚫', 'until': '2021.12.23' },
+                  '3.7':  { 'icon': '🔴', 'until': '2023.06.27' },
+                  '3.8':  { 'icon': '🟠', 'until': '2024.10' },
+                  '3.9':  { 'icon': '🟡', 'until': '2025.10' },
+                  '3.10': { 'icon': '🟢', 'until': '2026.10' },
+                  '3.11': { 'icon': '🟣', 'until': '2027.10' },
+              },
+              'sys': {
+                  'ubuntu':  { 'icon': '🐧', 'runs-on': 'ubuntu-latest',  'shell': 'bash' },
+                  'windows': { 'icon': '🧊', 'runs-on': 'windows-latest', 'shell': 'pwsh' },
+                  'msys2':   { 'icon': '🟦', 'runs-on': 'windows-latest', 'shell': 'msys2 {0}' },
+                  'macos':   { 'icon': '🍎', 'runs-on': 'macos-latest',   'shell': 'bash' }
+              }
           }
           jobs = [
-              {'python': version, 'icon': data[version]['icon']}
-              for version in versions
+              {
+                  'sysicon': data['sys'][system]['icon'],
+                  'system': system,
+                  'runs-on': data['sys'][system]['runs-on'],
+                  'shell': data['sys'][system]['shell'],
+                  'pyicon': data['python'][version]['icon'],
+                  'python': '3.11.0-alpha.3' if version == '3.11' else version
+              }
+              for system in systems
+              for version in (versions if system != 'msys2' else ['3.9'])
           ]
           print(f'::set-output name=python_jobs::{jobs!s}')
           print("Python jobs:")
diff --git a/.github/workflows/UnitTesting.yml b/.github/workflows/UnitTesting.yml
index ada82b4..f6b3a99 100644
--- a/.github/workflows/UnitTesting.yml
+++ b/.github/workflows/UnitTesting.yml
@@ -26,7 +26,7 @@ on:
   workflow_call:
     inputs:
       jobs:
-        description: 'JSON list with field <python>, telling the versions to run tests with.'
+        description: 'JSON list with environment fields, telling the system and Python versions to run tests with.'
         required: true
         type: string
       requirements:
@@ -48,29 +48,59 @@ on:
 jobs:
 
   UnitTesting:
-    name: ${{ matrix.icon }} Unit Tests using Python ${{ matrix.python }}
-    runs-on: ubuntu-latest
+    name: ${{ matrix.sysicon }} ${{ matrix.pyicon }} Unit Tests using Python ${{ matrix.python }}
+    runs-on: ${{ matrix.runs-on }}
 
     strategy:
       fail-fast: false
       matrix:
         include: ${{ fromJson(inputs.jobs) }}
 
+    defaults:
+      run:
+        shell: ${{ matrix.shell }}
+
     steps:
       - name: ⏬ Checkout repository
         uses: actions/checkout@v2
 
+      - name: '🟦 Setup MSYS2'
+        if: matrix.system == 'msys2'
+        uses: msys2/setup-msys2@v2
+        with:
+          msystem: MINGW64
+          update: true
+          pacboy: >-
+            python-pip:p
+            python-wheel:p
+            python-coverage:p
+            python-lxml:p
+
       - name: 🐍 Setup Python ${{ matrix.python }}
+        if: matrix.system != 'msys2'
         uses: actions/setup-python@v2
         with:
           python-version: ${{ matrix.python }}
 
-      - name: 🔧 Install dependencies
+      - name: ⚙️ Update pip
+        run: python -m pip install -U pip
+
+      - name: ⚙️ Install wheel
+        if: matrix.system != 'msys2'
         run: |
-          python -m pip install -U pip
-          python -m pip install ${{ inputs.requirements }}
+          python -m pip install -U wheel
+
+      - name: 🔧 Install dependencies
+        run: python -m pip install ${{ inputs.requirements }}
 
       - name: ☑ Run unit tests
+        if: matrix.system == 'windows'
+        run: |
+          $PYTEST_ARGS = if ("${{ inputs.artifact }}".length -gt 0) { "--junitxml=TestReport.xml" } else { "" }
+          python -m pytest -rA ${{ inputs.unittest_directory }} $PYTEST_ARGS --color=yes
+
+      - name: ☑ Run unit tests
+        if: matrix.system != 'windows'
         run: |
           [ 'x${{ inputs.artifact }}' != 'x' ] && PYTEST_ARGS='--junitxml=TestReport.xml' || unset PYTEST_ARGS
           python -m pytest -rA ${{ inputs.unittest_directory }} $PYTEST_ARGS --color=yes
@@ -79,7 +109,7 @@ jobs:
         if: inputs.artifact != ''
         uses: actions/upload-artifact@v2
         with:
-          name: ${{ inputs.artifact }}-${{ matrix.python }}
+          name: ${{ inputs.artifact }}-${{ matrix.system }}-${{ matrix.python }}
           path: TestReport.xml
           if-no-files-found: error
           retention-days: 1
diff --git a/.idea/Actions.iml b/.idea/Actions.iml
new file mode 100644
index 0000000..d0876a7
--- /dev/null
+++ b/.idea/Actions.iml
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<module type="PYTHON_MODULE" version="4">
+  <component name="NewModuleRootManager">
+    <content url="file://$MODULE_DIR$" />
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+</module>
\ No newline at end of file
diff --git a/.idea/inspectionProfiles/profiles_settings.xml b/.idea/inspectionProfiles/profiles_settings.xml
new file mode 100644
index 0000000..105ce2d
--- /dev/null
+++ b/.idea/inspectionProfiles/profiles_settings.xml
@@ -0,0 +1,6 @@
+<component name="InspectionProjectProfileManager">
+  <settings>
+    <option name="USE_PROJECT_PROFILE" value="false" />
+    <version value="1.0" />
+  </settings>
+</component>
\ No newline at end of file
diff --git a/.idea/modules.xml b/.idea/modules.xml
new file mode 100644
index 0000000..91c1f7c
--- /dev/null
+++ b/.idea/modules.xml
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectModuleManager">
+    <modules>
+      <module fileurl="file://$PROJECT_DIR$/.idea/Actions.iml" filepath="$PROJECT_DIR$/.idea/Actions.iml" />
+    </modules>
+  </component>
+</project>
\ No newline at end of file
diff --git a/ExamplePipeline.yml b/ExamplePipeline.yml
index 8e4af52..c3ba577 100644
--- a/ExamplePipeline.yml
+++ b/ExamplePipeline.yml
@@ -34,6 +34,7 @@ jobs:
     with:
       name: ToolName
       # Optional
+      system_list: 'ubuntu windows msys2 macos'
       python_version: '3.10'
       python_version_list: '3.8 3.9 3.10'