diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 0bb8b34..c283e94 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -28,7 +28,7 @@ jobs:
         - name: Install dependencies
           run: |
             python3 -m pip install --upgrade pip setuptools pytest pytest-cov pytest-subtests pytest-asyncio
-            pip install .
+            pip install --upgrade .
 
         - name: Check code and formatting
           run: scripts/check-python.sh .
@@ -56,7 +56,7 @@ jobs:
       - name: Install dependencies
         run: |
           python -m pip install --upgrade pip
-          pip install .
+          pip install --upgrade .
           rm -rf build
 
       - name: Download test results
diff --git a/src/great_ai/utilities/parallel_map/parallel_map.py b/src/great_ai/utilities/parallel_map/parallel_map.py
index 7ce61ff..9934046 100644
--- a/src/great_ai/utilities/parallel_map/parallel_map.py
+++ b/src/great_ai/utilities/parallel_map/parallel_map.py
@@ -100,6 +100,7 @@ def parallel_map(
         ctx.Process(
             name=f"parallel_map_{config.function_name}_{i}",
             target=mapper_function,
+            daemon=True,
             kwargs=dict(
                 input_queue=input_queue,
                 output_queue=output_queue,
diff --git a/tests/utilities/test_parallel_map.py b/tests/utilities/test_parallel_map.py
index 99c5260..07a14c8 100644
--- a/tests/utilities/test_parallel_map.py
+++ b/tests/utilities/test_parallel_map.py
@@ -87,15 +87,15 @@ class TestParallelMap(unittest.TestCase):
             )
         ) == [1, 4, 9]
 
-    # def test_worker_process_exception(self) -> None:
-    #     def oh_no(_):
-    #         raise ValueError("hi")
+    def test_worker_process_exception(self) -> None:
+        def oh_no(_):
+            raise ValueError("hi")
 
-    #     with pytest.raises(ValueError):
-    #         list(parallel_map(oh_no, range(COUNT), concurrency=2))
+        with pytest.raises(ValueError):
+            list(parallel_map(oh_no, range(COUNT), concurrency=2))
 
-    #     with pytest.raises(ValueError):
-    #         list(parallel_map(oh_no, range(COUNT), concurrency=1))
+        with pytest.raises(ValueError):
+            list(parallel_map(oh_no, range(COUNT), concurrency=1))
 
     def test_ignore_worker_process_exception(self) -> None:
         def oh_no(_):