diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 1cd88387..4709141b 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -43,7 +43,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        os: [ubuntu-latest, macos-latest, windows-latest]
+        os: [windows-2022, windows-latest]
         python-version: ["3.9", "3.10", "3.11", "3.12", "3.13", "3.14"]
     env:
       GITHUB_PAT: ${{ secrets.GITHUB_TOKEN }}
@@ -80,7 +80,7 @@ jobs:
         uses: actions/cache@v4
         with:
           path: ~/.cmdstan
-          key: ${{ runner.os }}-cmdstan-${{ needs.get-cmdstan-version.outputs.version }}-${{ hashFiles('**/install_cmdstan.py') }}
+          key: ${{ matrix.os }}-cmdstan-${{ needs.get-cmdstan-version.outputs.version }}-${{ hashFiles('**/install_cmdstan.py') }}
 
       - name: Delete precompiled header (MacOS)
         if: matrix.os == 'macos-latest' && steps.cache-cmdstan.outputs.cache-hit == 'true'
@@ -106,8 +106,8 @@ jobs:
           cd run_tests
           pytest -v ../test --cov=../cmdstanpy
 
-      - name: Submit codecov
-        run: |
-          pip install codecov
-          cd run_tests
-          codecov
+      # - name: Submit codecov
+      #   run: |
+      #     pip install codecov
+      #     cd run_tests
+      #     codecov