diff --git a/.github/workflows/test-windows.yml b/.github/workflows/test-windows.yml
index 7c8ca949c..223758b67 100644
--- a/.github/workflows/test-windows.yml
+++ b/.github/workflows/test-windows.yml
@@ -8,25 +8,98 @@ jobs:
     runs-on: windows-2016
     strategy:
       matrix:
-        python-version: ["3.7"]
+        python-version: ["3.6.8"]
     
-    name: Python ${{ matrix.python-version }}
+    name: Python ${{ matrix.python-version }} x86
     
     steps:
     - uses: actions/checkout@v1
     
-    - name: Prepare dependencies
-      run: python.exe winbuild\build_dep.py
-    
-    - name: Build dependencies
-      run: winbuild\build_deps.cmd
+    - name: Fetch dependencies
+      run: |
+        curl -fsSL -o pillow-depends.zip https://github.com/python-pillow/pillow-depends/archive/master.zip
+        7z x pillow-depends.zip -oc:\
+        mv c:\pillow-depends-master c:\pillow-depends
+        xcopy c:\pillow-depends\*.zip $env:GITHUB_WORKSPACE\winbuild\
+        xcopy c:\pillow-depends\*.tar.gz $env:GITHUB_WORKSPACE\winbuild\
+        xcopy /s c:\pillow-depends\test_images\* $env:GITHUB_WORKSPACE\tests\images\
+        cd $env:GITHUB_WORKSPACE/winbuild/
+        python.exe $env:GITHUB_WORKSPACE\winbuild\build_dep.py
+        # .\build_deps.cmd
+      env:
+        PYTHON: C:\hostedtoolcache\windows\Python\${{ matrix.python-version }}\x86\
+        EXECUTABLE: bin\python.exe
+      shell: pwsh
+
+    - name: Build dependencies / libjpeg
+      run: |
+        call "C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\vcvarsall.bat" x86 8.1
+        echo on
+        set INCLUDE=C:\Program Files (x86)\Microsoft SDKs\Windows\V7.1A\Include;%INCLUDE%
+        set INCLIB=%GITHUB_WORKSPACE%\winbuild\depends\msvcr10-x32
+        set BUILD=%GITHUB_WORKSPACE%\winbuild\build
+        cd /D %BUILD%\jpeg-9c
+        nmake -nologo -f makefile.vc setup-vc6
+        nmake -nologo -f makefile.vc clean
+        nmake -nologo -f makefile.vc nodebug=1 libjpeg.lib
+        copy /Y /B j*.h %INCLIB%
+        copy /Y /B *.lib %INCLIB%
+
+    - name: Build dependencies / zlib
+      run: |
+        call "C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\vcvarsall.bat" x86 8.1
+        echo on
+        set INCLUDE=C:\Program Files (x86)\Microsoft SDKs\Windows\V7.1A\Include;%INCLUDE%
+        set INCLIB=%GITHUB_WORKSPACE%\winbuild\depends\msvcr10-x32
+        set BUILD=%GITHUB_WORKSPACE%\winbuild\build
+        cd /D %BUILD%\zlib-1.2.11
+        nmake -nologo -f win32\Makefile.msc clean
+        nmake -nologo -f win32\Makefile.msc zlib.lib
+        copy /Y /B z*.h %INCLIB%
+        copy /Y /B *.lib %INCLIB%
+        copy /Y /B zlib.lib %INCLIB%\z.lib
+
+    - name: Build dependencies / libtiff
+      run: |
+        call "C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\vcvarsall.bat" x86 8.1
+        echo on
+        set INCLUDE=C:\Program Files (x86)\Microsoft SDKs\Windows\V7.1A\Include;%INCLUDE%
+        set INCLIB=%GITHUB_WORKSPACE%\winbuild\depends\msvcr10-x32
+        set BUILD=%GITHUB_WORKSPACE%\winbuild\build
+        cd /D %BUILD%\tiff-4.0.10
+        copy %GITHUB_WORKSPACE%\winbuild\nmake.opt nmake.opt
+        nmake -nologo -f makefile.vc clean
+        nmake -nologo -f makefile.vc lib
+        copy /Y /B libtiff\tiff*.h %INCLIB%
+        copy /Y /B libtiff\*.dll %INCLIB%
+        copy /Y /B libtiff\*.lib %INCLIB%
+
+    - name: Build dependencies / webp
+      run: |
+        call "C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\vcvarsall.bat" x86 8.1
+        echo on
+        set INCLUDE=C:\Program Files (x86)\Microsoft SDKs\Windows\V7.1A\Include;%INCLUDE%
+        set INCLIB=%GITHUB_WORKSPACE%\winbuild\depends\msvcr10-x32
+        set BUILD=%GITHUB_WORKSPACE%\winbuild\build
+        cd /D %BUILD%\libwebp-1.0.3
+        rmdir /S /Q output\release-static
+        nmake -nologo -f Makefile.vc CFG=release-static RTLIBCFG=static OBJDIR=output ARCH=x86 all
+        mkdir %INCLIB%\webp
+        copy /Y /B src\webp\*.h %INCLIB%\webp
+        copy /Y /B output\release-static\x86\lib\* %INCLIB%
     
     - name: Build
-      run: python.exe winbuild\build.py
+      run: '%PYTHON%\%EXECUTABLE% %GITHUB_WORKSPACE%\winbuild\build.py'
+      env:
+        PYTHON: C:\hostedtoolcache\windows\Python\${{ matrix.python-version }}\x86\
+        EXECUTABLE: python.exe
     
     - name: Test
-      run: python.exe selftest.py --installed
+      run: '%PYTHON%\%EXECUTABLE% %GITHUB_WORKSPACE%\selftest.py --installed'
+      env:
+        PYTHON: C:\hostedtoolcache\windows\Python\${{ matrix.python-version }}\x86\
+        EXECUTABLE: python.exe
     
     - name: After success
-      run: echo TODO
+      run: echo TODO 1>&2
     
diff --git a/winbuild/config.py b/winbuild/config.py
index debfe9527..ff775a921 100644
--- a/winbuild/config.py
+++ b/winbuild/config.py
@@ -4,11 +4,14 @@ SF_MIRROR = "http://iweb.dl.sourceforge.net"
 PILLOW_DEPENDS_DIR = "C:\\pillow-depends\\"
 
 pythons = {
+    # for AppVeyor
     "27": {"compiler": 7, "vc": 2010},
     "pypy2": {"compiler": 7, "vc": 2010},
     "35": {"compiler": 7.1, "vc": 2015},
     "36": {"compiler": 7.1, "vc": 2015},
     "37": {"compiler": 7.1, "vc": 2015},
+    # for GitHub Actions
+    "3.6": {"compiler": 7.1, "vc": 2015},
 }
 
 VIRT_BASE = "c:/vp/"