diff --git a/.gitea/workflows/ci.yml b/.gitea/workflows/ci.yml
index 6cf003b3..efe0318d 100644
--- a/.gitea/workflows/ci.yml
+++ b/.gitea/workflows/ci.yml
@@ -102,6 +102,10 @@ jobs:
           git clone https://gitea.psi.ch/bec/${{ matrix.plugin_repo }}.git
           uv pip install -e ./mx_bec
           uv pip install -e ./${{ matrix.plugin_repo }}
+          # The bec plugin deps drag PySide6 up to >=6.10, which segfaults
+          # the unit suite in teardown (see the pyproject pin). Force the
+          # project's capped version back after the plugin install.
+          uv pip install "pyside6<6.10"
 
       - name: Run Pytest
         env: