Run tests randomly and in parallel

.github/workflows/python-package.yml

@@ -58,6 +58,10 @@ jobs:
       run: |
         uv tool install pytest
 
+    - name: Install pytest plugins xdist and randomly
+      run: |
+        uv pip install pytest-xdist[psutil] pytest-randomly
+
     - name: Test with pytest
       run: |
-        pytest -s tests/
+        pytest -s --full-trace --numprocesses auto tests/

Makefile

@@ -32,7 +32,8 @@ GIT_MAIN_BRANCH:=master
 # -s: do not capture stdout/stderr (some tests fail otherwise)
 # --full-trace: print full stacktrace on keyboard interrupts
 # --log-file: write test output to file for easier inspection
-PYTESTOPTS?=-s --full-trace --log-file=build/test.log
+# --numprocesses auto: run tests in parallel on available CPU cores (uses pytest-xdist) 
+PYTESTOPTS?=-s --full-trace --log-file=build/test.log --numprocesses auto
 # which test modules to run
 TESTS ?= tests/
 # set test options

pyproject.toml

@@ -24,6 +24,10 @@ dev-dependencies = [
 
   # for testing
   "pytest==8.3.3",
+  # plugin to run tests in parallel
+  "pytest-xdist[psutil]==3.6.1",
+  # plugin to run tests in random order
+  "pytest-randomly==3.16.0",
 
   # for python code linting
   "ruff==0.7.2",