diff --git a/.github/workflows/ci_pipeline.yml b/.github/workflows/ci_pipeline.yml
index 6392f6f6ad..0c2dc97638 100644
--- a/.github/workflows/ci_pipeline.yml
+++ b/.github/workflows/ci_pipeline.yml
@@ -60,7 +60,7 @@ jobs:
 
     strategy:
       matrix:
-        python: ['3.8', '3.9', '3.10', '3.11']
+        python: ['3.8', '3.9', '3.10']
         env: ['base', 'fenics', 'mpi4py', 'petsc']
 
     defaults:
@@ -83,7 +83,7 @@ jobs:
           echo "print('Loading sitecustomize.py...')
           import coverage
           coverage.process_startup() " > sitecustomize.py
-          coverage run -m pytest --continue-on-collection-errors -vs --durations=0 pySDC/tests -m ${{ matrix.env }}
+          coverage run -m pytest --continue-on-collection-errors -v --durations=0 pySDC/tests -m ${{ matrix.env }}
 
       - name: Make coverage report
         run: |
diff --git a/etc/environment-mpi4py.yml b/etc/environment-mpi4py.yml
index e2de478f26..e7539720f0 100644
--- a/etc/environment-mpi4py.yml
+++ b/etc/environment-mpi4py.yml
@@ -5,7 +5,7 @@ channels:
 dependencies:
   - numpy>=1.15.4
   - scipy>=0.17.1
-  - matplotlib>=3.0
+  - matplotlib>=3.0,<=3.5.3
   - dill>=0.2.6
   - mpich
   - mpi4py-fft>=2.0.2