chore: Disable --dist loadgroup in pytest (#21885)

Author: orlp

.github/workflows/benchmark.yml

@@ -138,10 +138,10 @@ jobs:
 
       - name: Run non-benchmark tests
         working-directory: py-polars
-        run: pytest -m 'not benchmark and not debug' -n auto --dist loadgroup
+        run: pytest -m 'not benchmark and not debug' -n auto
 
       - name: Run non-benchmark tests on new streaming engine
         working-directory: py-polars
         env:
           POLARS_AUTO_NEW_STREAMING: 1
-        run: pytest -n auto --dist loadgroup -m "not may_fail_auto_streaming and not slow and not write_disk and not release and not docs and not hypothesis and not benchmark and not ci_only"
+        run: pytest -n auto -m "not may_fail_auto_streaming and not slow and not write_disk and not release and not docs and not hypothesis and not benchmark and not ci_only"

.github/workflows/test-coverage.yml

@@ -135,7 +135,7 @@ jobs:
         working-directory: py-polars
         run: >
           pytest
-          -n auto --dist loadgroup
+          -n auto
           -m "not release and not benchmark and not docs"
           -k 'not test_polars_import'
           --cov --cov-report xml:main.xml
@@ -146,7 +146,7 @@ jobs:
           POLARS_FORCE_ASYNC: 1
         run: >
           pytest tests/unit/io/
-          -n auto --dist loadgroup
+          -n auto
           -m "not release and not benchmark and not docs"
           --cov --cov-report xml:async.xml --cov-fail-under=0
 

.github/workflows/test-python.yml

@@ -91,13 +91,13 @@ jobs:
 
       - name: Run tests
         if: github.ref_name != 'main'
-        run: pytest -n auto --dist loadgroup -m "not release and not benchmark and not docs"
+        run: pytest -n auto -m "not release and not benchmark and not docs"
 
       - name: Run tests with new streaming engine
         if: github.ref_name != 'main'
         env:
           POLARS_AUTO_NEW_STREAMING: 1
-        run: pytest -n auto --dist loadgroup -m "not may_fail_auto_streaming and not slow and not write_disk and not release and not docs and not hypothesis and not benchmark and not ci_only"
+        run: pytest -n auto -m "not may_fail_auto_streaming and not slow and not write_disk and not release and not docs and not hypothesis and not benchmark and not ci_only"
 
       - name: Run tests async reader tests
         if: github.ref_name != 'main' && matrix.os != 'windows-latest'

py-polars/Makefile

@@ -69,11 +69,11 @@ pre-commit: fmt clippy  ## Run all code formatting and lint/quality checks
 
 .PHONY: test
 test: .venv build  ## Run fast unittests
-	$(VENV_BIN)/pytest -n auto --dist loadgroup $(PYTEST_ARGS)
+	$(VENV_BIN)/pytest -n auto $(PYTEST_ARGS)
 
 .PHONY: test-all
 test-all: .venv build  ## Run all tests
-	$(VENV_BIN)/pytest -n auto --dist loadgroup -m "slow or not slow"
+	$(VENV_BIN)/pytest -n auto -m "slow or not slow"
 	$(VENV_BIN)/python tests/docs/run_doctest.py
 
 .PHONY: doctest
@@ -92,7 +92,7 @@ docs-clean: .venv  ## Build Python docs (full rebuild)
 
 .PHONY: coverage
 coverage: .venv build  ## Run tests and report coverage
-	$(VENV_BIN)/pytest --cov -n auto --dist loadgroup -m "not release and not benchmark"
+	$(VENV_BIN)/pytest --cov -n auto -m "not release and not benchmark"
 
 .PHONY: clean
 clean:  ## Clean up caches and build artifacts