Force UTF-8 Unicode encoding when running tests both locally and in GitHub Actions

Author: tleonhardt

.github/workflows/tests.yml

@@ -36,11 +36,12 @@ jobs:
         run: uv sync --all-extras --dev
 
       - name: Run tests
-        run: uv run python -m pytest --cov --cov-config=pyproject.toml --cov-report=xml tests
+        run: uv run python -Xutf8 -m pytest --cov --cov-config=pyproject.toml --cov-report=xml tests
 
       - name: Run isolated tests
         run:
-          uv run python -m pytest --cov --cov-config=pyproject.toml --cov-report=xml tests_isolated
+          uv run python -Xutf8 -m pytest --cov --cov-config=pyproject.toml --cov-report=xml
+          tests_isolated
 
       - name: Upload test results to Codecov
         if: ${{ !cancelled() }}

Makefile

@@ -33,8 +33,8 @@ typecheck: ## Perform type checking
 .PHONY: test
 test: ## Test the code with pytest.
 	@echo "🚀 Testing code: Running pytest"
-	@uv run python -m pytest --cov --cov-config=pyproject.toml --cov-report=xml tests
-	@uv run python -m pytest --cov --cov-config=pyproject.toml --cov-report=xml tests_isolated
+	@uv run python -Xutf8 -m pytest --cov --cov-config=pyproject.toml --cov-report=xml tests
+	@uv run python -Xutf8 -m pytest --cov --cov-config=pyproject.toml --cov-report=xml tests_isolated
 
 .PHONY: docs-test
 docs-test: ## Test if documentation can be built without warnings or errors