diff --git a/tests/conftest.py b/tests/conftest.py
index ec9712d7..22d7cd02 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -16,7 +16,7 @@ if project_root not in sys.path:
     sys.path.insert(0, project_root)
 
 _RUN_ID = datetime.datetime.now().strftime("%Y%m%d_%H%M%S")
-_RUN_WORKSPACE = Path(f"tests/artifacts/live_gui_workspace_{_RUN_ID}")
+_RUN_WORKSPACE = Path(f"tests/artifacts/live_gui_workspace_{_RUN_ID}_{os.getpid()}")
 thirdparty_dir = os.path.join(os.path.dirname(__file__), "..", "thirdparty")
 if thirdparty_dir not in sys.path:
     sys.path.insert(0, thirdparty_dir)