diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index e306c20..27eadcf 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -21,11 +21,36 @@ on:
 # However, keep step 1 only, considering the difficulty to get a specific runner with MS Word installed.
 # -----------------------------------------------------------------------------------------------------
 jobs:
+  
+  pdf2docx-docker:
+    
+    runs-on: ubuntu-latest
+    
+    container:
+      image: python:3.8
+
+    steps:
+      - name: Check out code
+        uses: actions/checkout@v2
+      
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip
+          pip install -r requirements.txt
+          pip install pytest
+          python setup.py develop
+
+      - name: Run unit test
+        run: |
+          pytest -v ./test/test.py::TestConversion
 
-  pdf2docx:
+
+  pdf2docx-ubuntu:
 
     runs-on: ubuntu-latest
 
+    needs: pdf2docx-docker
+
     strategy:
       matrix:
         python-version: ["3.8", "3.9", "3.10"]
@@ -60,75 +85,4 @@ jobs:
         uses: actions/upload-artifact@v2
         with:
             name: outputs
-            path: ./test/outputs
-  
-
-  # docx2pdf:
-  #   # a specific runner with MS Word installed
-  #   runs-on: self-hosted
-
-  #   needs: pdf2docx
-
-  #   steps:
-  #     - name: Checkout code
-  #       uses: actions/checkout@v2
-
-  #     # download artifacts from depending job
-  #     - name: Download artifacts
-  #       uses: actions/download-artifact@v2
-  #       with:
-  #         name: outputs
-  #         path: test\outputs
-
-  #     # convert docx to pdf with OfficeToPDF
-  #     - name: Convert to PDF
-  #       run: |
-  #         cd test\outputs
-  #         $files = Get-ChildItem "."
-  #         for ($i=0; $i -lt $files.Count; $i++) { 
-  #           $name = $files[$i].name;
-  #           echo "Converting $name to pdf...";
-  #           OfficeToPDF $files[$i] 
-  #         }
-  #         del *.docx
-      
-  #     # upload pdf for further job
-  #     - name: Archive package
-  #       uses: actions/upload-artifact@v2
-  #       with:
-  #           name: outputs
-  #           path: test\outputs
-
-
-  # check_quality:
-
-  #   runs-on: ubuntu-latest
-
-  #   needs: docx2pdf
-
-  #   steps:
-  #     - name: Check out code
-  #       uses: actions/checkout@v2
-      
-  #     # download artifacts from depending job
-  #     - name: Download artifacts
-  #       uses: actions/download-artifact@v2
-  #       with:
-  #         name: outputs
-  #         path: ./test/outputs
-
-  #     - name: Set up Python 3.x
-  #       uses: actions/setup-python@v1
-  #       with:
-  #         python-version: '3.x'
-
-  #     - name: Install dependencies
-  #       run: |
-  #         python -m pip install --upgrade pip
-  #         pip install -r requirements.txt
-  #         pip install pytest
-  #         python setup.py develop
-
-  #     - name: Check converting quality
-  #       run: |
-  #         pytest -sv ./test/test.py::TestQuality
\ No newline at end of file
+            path: ./test/outputs
\ No newline at end of file