diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 06e4463107..90f58b86e0 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -205,3 +205,49 @@ jobs:
           env_vars: OS,PYTHON
           name: codecov-umbrella
           fail_ci_if_error: false
+
+  build_windows:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os: [windows-2022]
+        python-version: [3.8]
+        platform: [cpu]
+    steps:
+      - uses: actions/checkout@v2
+      - name: Set up Python ${{ matrix.python-version }}
+        uses: actions/setup-python@v2
+        with:
+          python-version: ${{ matrix.python-version }}
+      - name: Upgrade pip
+        run: pip install pip --upgrade --user
+      - name: Install PyTorch
+        # As a complement to Linux CI, we test on PyTorch LTS version
+        run: pip install torch==1.8.2+${{ matrix.platform }} torchvision==0.9.2+${{ matrix.platform }} -f https://download.pytorch.org/whl/lts/1.8/torch_lts.html
+      - name: Install MMCV
+        run: pip install mmcv-full -f https://download.openmmlab.com/mmcv/dist/cpu/torch1.8/index.html --only-binary mmcv-full
+      - name: Install mmpose dependencies
+        run: |
+          python -V
+          python -m pip install xtcocotools
+          python -m pip install -r requirements/tests.txt -r requirements/optional.txt
+          python -m pip install albumentations>=0.3.2 --no-binary imgaug,albumentations
+          python -c 'import mmcv; print(mmcv.__version__)'
+      - name: Show pip list
+        run: pip list
+      - name: Build and install
+        run: pip install -e .
+      - name: Run unittests
+        run: coverage run --branch --source mmpose -m pytest tests -sv
+      - name: Generate coverage report
+        run: |
+          coverage xml
+          coverage report -m
+      - name: Upload coverage to Codecov
+        uses: codecov/codecov-action@v2
+        with:
+          file: ./coverage.xml
+          flags: unittests
+          env_vars: OS,PYTHON
+          name: codecov-umbrella
+          fail_ci_if_error: false
diff --git a/configs/_base_/filters/gausian_filter.py b/configs/_base_/filters/gausian_filter.py
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/tests/test_backbones/test_hourglass.py b/tests/test_backbones/test_hourglass.py
index 342ac1c66b..3a85610969 100644
--- a/tests/test_backbones/test_hourglass.py
+++ b/tests/test_backbones/test_hourglass.py
@@ -28,21 +28,21 @@ def test_hourglass_backbone():
     model.init_weights()
     model.train()
 
-    imgs = torch.randn(1, 3, 511, 511)
+    imgs = torch.randn(1, 3, 256, 256)
     feat = model(imgs)
     assert len(feat) == 1
-    assert feat[0].shape == torch.Size([1, 256, 128, 128])
+    assert feat[0].shape == torch.Size([1, 256, 64, 64])
 
     # Test HourglassNet-104
     model = HourglassNet(num_stacks=2)
     model.init_weights()
     model.train()
 
-    imgs = torch.randn(1, 3, 511, 511)
+    imgs = torch.randn(1, 3, 256, 256)
     feat = model(imgs)
     assert len(feat) == 2
-    assert feat[0].shape == torch.Size([1, 256, 128, 128])
-    assert feat[1].shape == torch.Size([1, 256, 128, 128])
+    assert feat[0].shape == torch.Size([1, 256, 64, 64])
+    assert feat[1].shape == torch.Size([1, 256, 64, 64])
 
 
 def test_hourglass_ae_backbone():
@@ -60,18 +60,18 @@ def test_hourglass_ae_backbone():
     model.init_weights()
     model.train()
 
-    imgs = torch.randn(1, 3, 512, 512)
+    imgs = torch.randn(1, 3, 256, 256)
     feat = model(imgs)
     assert len(feat) == 1
-    assert feat[0].shape == torch.Size([1, 34, 128, 128])
+    assert feat[0].shape == torch.Size([1, 34, 64, 64])
 
     # num_stack=2
     model = HourglassAENet(num_stacks=2)
     model.init_weights()
     model.train()
 
-    imgs = torch.randn(1, 3, 512, 512)
+    imgs = torch.randn(1, 3, 256, 256)
     feat = model(imgs)
     assert len(feat) == 2
-    assert feat[0].shape == torch.Size([1, 34, 128, 128])
-    assert feat[1].shape == torch.Size([1, 34, 128, 128])
+    assert feat[0].shape == torch.Size([1, 34, 64, 64])
+    assert feat[1].shape == torch.Size([1, 34, 64, 64])