diff --git a/.github/workflows/checkCI.yml b/.github/workflows/checkCI.yml
index 64a2376..5ddaa12 100644
--- a/.github/workflows/checkCI.yml
+++ b/.github/workflows/checkCI.yml
@@ -10,7 +10,7 @@ defaults:
     shell: bash
 
 jobs:
-  build:
+  build_linux:
     name: build_${{ matrix.platform }}
     runs-on: ubuntu-latest
     strategy:
@@ -49,6 +49,32 @@ jobs:
           name: ExternData_${{ matrix.platform }}
           path: ExternData/Resources/Library/${{ matrix.platform }}/*.a
 
+  build_mingw64:
+    name: build_mingw64
+    runs-on: windows-latest
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 5
+      - name: Install HDF5
+        shell: pwsh
+        run: |
+          $env:PATH="$env:PATH;C:\msys64\mingw64\bin;C:\msys64\usr\bin;"
+          C:\msys64\usr\bin\pacman.exe -Syu --noconfirm
+          C:\msys64\usr\bin\pacman.exe -S --noconfirm mingw-w64-x86_64-hdf5 mingw-w64-x86_64-pkgconf
+      - name: Build with gcc
+        shell: pwsh
+        run: |
+          $env:PATH="$env:PATH;C:\msys64\mingw64\bin;C:\msys64\usr\bin;"
+          pushd ExternData/Resources/C-Sources
+          mingw32-make CFLAGS="-O3 -DNDEBUG -I/C:\msys64\mingw64\lib" TARGETDIR="mingw64"
+      - name: Upload artifacts
+        uses: actions/upload-artifact@v4
+        with:
+          name: ExternData_mingw64
+          path: ExternData/Resources/Library/mingw64/*.a
+
   test:
     name: test_cmake_${{ matrix.toolchain }}
     runs-on: ${{ matrix.os }}
@@ -57,18 +83,10 @@ jobs:
       fail-fast: false
       matrix:
         toolchain:
-          - linux-gcc
-          - windows-msvc
           - windows-mingw
         configuration:
           - Release
         include:
-          - toolchain: linux-gcc
-            os: ubuntu-latest
-            compiler: gcc
-          - toolchain: windows-msvc
-            os: windows-latest
-            compiler: msvc
           - toolchain: windows-mingw
             os: windows-latest
             compiler: mingw
@@ -77,12 +95,19 @@ jobs:
         uses: actions/checkout@v4
         with:
           fetch-depth: 5
+      - name: Install HDF5
+        if: matrix.compiler == 'mingw'
+        shell: pwsh
+        run: |
+          $env:PATH="$env:PATH;C:\msys64\mingw64\bin;C:\msys64\usr\bin;"
+          C:\msys64\usr\bin\pacman.exe -Syu --noconfirm
+          C:\msys64\usr\bin\pacman.exe -S --noconfirm mingw-w64-x86_64-hdf5 mingw-w64-x86_64-pkgconf
       - name: Configure
         run: |
           if [ "${{ matrix.compiler }}" == "msvc" ]; then
             cmake -S "$SRCDIR" -B build
           elif [ "${{ matrix.compiler }}" == "mingw" ]; then
-            cmake -S "$SRCDIR" -B build -DCMAKE_BUILD_TYPE=${{ matrix.configuration }} -G "MinGW Makefiles"
+            cmake -S "$SRCDIR" -B build -DCMAKE_BUILD_TYPE=${{ matrix.configuration }} -DCMAKE_EXE_LINKER_FLAGS="-L/C:\msys64\mingw64\lib" -G "MinGW Makefiles"
           else
             cmake -S "$SRCDIR" -B build -DCMAKE_BUILD_TYPE=${{ matrix.configuration }} -DCMAKE_C_FLAGS="-Wall -Wextra"
           fi
diff --git a/ExternData/Resources/BuildProjects/CMake/test.cmake b/ExternData/Resources/BuildProjects/CMake/test.cmake
index f566cdc..ee90bd7 100644
--- a/ExternData/Resources/BuildProjects/CMake/test.cmake
+++ b/ExternData/Resources/BuildProjects/CMake/test.cmake
@@ -43,9 +43,6 @@ if(EXISTS "${ED_TEST_DIR}")
     Test_ED_XML
     Test_ED_XML2
   )
-  if(MINGW)
-    list(REMOVE_ITEM ED_TESTS Test_ED_MAT)
-  endif()
   foreach(TEST ${ED_TESTS})
     add_executable(${TEST}
       "${ED_TEST_DIR}/${TEST}.cc"
@@ -75,8 +72,6 @@ if(EXISTS "${ED_TEST_DIR}")
     )
     if(UNIX)
       list(APPEND ED_ALL_LIBS m)
-    elseif(MINGW)
-      list(REMOVE_ITEM ED_ALL_LIBS hdf5)
     endif()
     target_link_libraries(${TEST} PRIVATE ${ED_ALL_LIBS})