diff --git a/.github/actions/python-environment/action.yml b/.github/actions/python-environment/action.yml
index a2d43dc38..b292fa4fe 100644
--- a/.github/actions/python-environment/action.yml
+++ b/.github/actions/python-environment/action.yml
@@ -11,7 +11,7 @@ inputs:
   poetry-version:
     description: 'Poetry version to use'
     required: true
-    default: "2.1.2"
+    default: "2.1.4"
 
   working-directory:
     description: 'Working directory to use'
@@ -32,29 +32,61 @@ runs:
   using: "composite"
   steps:
 
-    - name: Set up pipx if not present
+
+    - name: Set up Python (${{ inputs.python-version}})
+      uses: actions/setup-python@v5
+      with:
+        python-version: ${{ inputs.python-version }}
+
+    - name: Ensure wget
+      shell: bash
+      run: sudo apt update && sudo apt install -y wget
+
+    - name: Set up Poetry (${{ inputs.poetry-version }})
       shell: bash
       run: |
-        sudo apt update && sudo apt install -y pipx
-        python3 -m pipx ensurepath
+        wget --tries=10 --waitretry 10 --retry-connrefused --https-only -O - https://install.python-poetry.org | POETRY_VERSION="${{ inputs.poetry-version }}" "$PYTHON_BINARY" -
         echo "$HOME/.local/bin" >> $GITHUB_PATH
+      env:
+        PYTHON_BINARY: "python${{ inputs.python-version }}"
 
-    - name: Set up Poetry (${{ inputs.poetry-version }})
+    - name: Setup cache variables
+      id: setup-cache-variables
       shell: bash
-      run: pipx install poetry==${{ inputs.poetry-version }}
+      run: |
+        echo "ImageOS=$ImageOS"
+        echo "ImageVersion=$ImageVersion"
+        POETRY_ENV_PATH=$(poetry config virtualenvs.path)
+        POETRY_SHA=$(sha256sum poetry.lock | awk '{print $1}') #Remove trailing filename
+        echo "POETRY_ENV_PATH=$POETRY_ENV_PATH" >>  $GITHUB_OUTPUT
+        echo "IMAGE_OS=$ImageOS" >> $GITHUB_OUTPUT
+        echo "IMAGE_VERSION=$ImageVersion" >> $GITHUB_OUTPUT
+        echo "POETRY_SHA=$POETRY_SHA" >> $GITHUB_OUTPUT
+        
 
-    - name: Set up Python (${{ inputs.python-version}})
-      uses: actions/setup-python@v5
+    - name: Cache Poetry environment
+      if: inputs.use-cache == 'true'
+      id: cache-poetry-env
+      uses: actions/cache@v4
       with:
-        python-version: ${{ inputs.python-version }}
-        cache: ${{ inputs.use-cache == 'true' && 'poetry' || '' }}
+        path: ${{ steps.setup-cache-variables.outputs.POETRY_ENV_PATH }}
+        key: poetry-env-${{ steps.setup-cache-variables.outputs.POETRY_SHA }}-${{ steps.setup-cache-variables.outputs.IMAGE_OS }}-${{ steps.setup-cache-variables.outputs.IMAGE_VERSION }}-${{ runner.arch }}-${{ inputs.poetry-version }}-${{ inputs.python-version }}-${{ inputs.extras }}
 
     - name: Poetry install with extras
+      if: inputs.use-cache != 'true' || steps.cache-poetry-env.outputs.cache-hit != 'true'
       working-directory: ${{ inputs.working-directory }}
       shell: bash
       run: |
+        EXTRAS=$(echo "${{ inputs.extras }}" | tr -d ' ')
         if [[ -n "$EXTRAS" ]]; then
           poetry install --extras "$EXTRAS"
         else
           poetry install
         fi
+
+    - name: Validate Poetry environment
+      working-directory: ${{ inputs.working-directory }}
+      shell: bash
+      run: |
+        poetry run python --version
+        poetry run python --version | grep "${{ inputs.python-version }}"
diff --git a/.github/workflows/slow-checks.yml b/.github/workflows/slow-checks.yml
index 9932b1b04..13f2210a2 100644
--- a/.github/workflows/slow-checks.yml
+++ b/.github/workflows/slow-checks.yml
@@ -59,7 +59,12 @@ jobs:
           - int-linux-x64-4core-gpu-t4-ubuntu24.04-1
           - int-linux-x64-4core-ubuntu24.04-1
           - int-linux-x64-2core-ubuntu24.04-1
-    name: Install Pipx on ${{ matrix.runner }}
+        python-version:
+          - "3.10"
+          - "3.11"
+          - "3.12"
+          - "3.13"
+    name: Install Pipx on ${{ matrix.runner }} with Python "${{ matrix.python-version }}"
     runs-on:
       labels: ${{ matrix.runner }}
 
@@ -67,8 +72,17 @@ jobs:
       - name: SCM Checkout
         uses: actions/checkout@v4
 
-      - name: Setup Python & Poetry Environment
+      - name: Set up Python & Poetry Environment
         uses: ./.github/actions/python-environment
+        with:
+          python-version: "${{ matrix.python-version }}"
 
       - name: Poetry version
         run: poetry --version
+
+      - name: Validate Python version
+        run: |
+          poetry run which python
+          poetry run python --version
+          poetry env list
+          poetry run python --version | grep "${{ matrix.python-version }}"
\ No newline at end of file
diff --git a/doc/changes/changes_1.7.3.md b/doc/changes/changes_1.7.3.md
index ffa4527d7..f3146cd03 100644
--- a/doc/changes/changes_1.7.3.md
+++ b/doc/changes/changes_1.7.3.md
@@ -2,3 +2,8 @@
 ## Bugfixes
 
 * #523: Fixed `pipx` installation for older versions of `pip`
+
+## Refactorings
+
+* #525: Added tests for installing `pipx` on different GitHub runners
+
diff --git a/doc/changes/unreleased.md b/doc/changes/unreleased.md
index c35ec589c..23386ba84 100644
--- a/doc/changes/unreleased.md
+++ b/doc/changes/unreleased.md
@@ -1,5 +1,5 @@
 # Unreleased
 
-## Refactorings
+## Bugfixes
 
-* #525: Added tests for installing `pipx` on different GitHub runners
+* #527: Use correct Python version in actions/python-environment