Fix unit tests workflow

Author: XkunW

.github/workflows/unit_tests.yml

@@ -62,14 +62,14 @@ jobs:
 
       - name: Install dependencies and check code
         run: |
-          uv run pytest -m "not integration_test" --cov vec_inf --cov-report=xml tests --prerelease=allow
+          uv run --frozen pytest -m "not integration_test" --cov vec_inf --cov-report=xml tests
 
       - name: Install the core package only
         run: uv sync --no-dev
 
       - name: Run package import tests
         run: |
-          uv run pytest tests/test_imports.py
+          uv run --frozen pytest tests/test_imports.py
 
       - name: Import Codecov GPG public key
         run: |
@@ -79,7 +79,7 @@ jobs:
         uses: codecov/codecov-action@v5.5.1
         with:
           token: ${{ secrets.CODECOV_TOKEN }}
-          file: ./coverage.xml
+          files: ./coverage.xml
           name: codecov-umbrella
           fail_ci_if_error: true
           verbose: true