diff --git a/.github/workflows/python_matrix.yml b/.github/workflows/python_matrix.yml
index 16afea4..8f64cef 100644
--- a/.github/workflows/python_matrix.yml
+++ b/.github/workflows/python_matrix.yml
@@ -55,7 +55,7 @@ jobs:
           # the local autolens — which never matches because PyPI is stale.
           pip install \
             -e ./PyAutoConf \
-            -e ./PyAutoArray \
+            -e "./PyAutoArray[optional]" \
             -e ./PyAutoFit \
             -e ./PyAutoGalaxy \
             -e "./PyAutoLens[optional]"
@@ -109,7 +109,7 @@ jobs:
           python -m pip install --upgrade pip wheel
           pip install \
             -e ./PyAutoConf \
-            -e ./PyAutoArray \
+            -e "./PyAutoArray[optional]" \
             -e ./PyAutoFit \
             -e ./PyAutoGalaxy \
             -e "./PyAutoLens[optional]"