diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 830295d535799e1815ca37eb7e5ff72f6b2dbc36..40f0b8e2cedfe80386575a8a2888c7b9c4f7133c 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -42,10 +42,10 @@ coverage:
     # Install required 'libgl1' system dependency:
     - apt-get update && apt-get install libgl1 libxcursor1 -y
     # Install faster solver 'conda-libmamba-solver' & set it as default solver:
-    - conda install -y -n base -c conda-forge conda-libmamba-solver
-    - conda config --set solver libmamba
+    # - conda install -y -n base -c conda-forge conda-libmamba-solver
+    # - conda config --set solver libmamba
     # Create 'bvpy' conda environment & activate it:
-    - conda create -y -n bvpy -c conda-forge "python=3.9" "fenics=2019.1" "python-gmsh=4.11.1"
+    - conda create -y -n bvpy -c conda-forge "python=3.9" "fenics=2019.1"
     - source activate bvpy
     # Install `bvpy` from sources:
     - python -m pip install -e .[test]
@@ -97,8 +97,8 @@ pages:
     # Install required 'libgl1' system dependency:
     - apt-get update && apt-get install libgl1 -y
     # Install faster solver 'conda-libmamba-solver' & set it as default solver:
-    - conda install -y -n base -c conda-forge conda-libmamba-solver
-    - conda config --set solver libmamba
+    # - conda install -y -n base -c conda-forge conda-libmamba-solver
+    # - conda config --set solver libmamba
     # Create 'bvpy' conda environment & activate it:
     - conda create -y -n bvpy -c conda-forge "python=3.9" "fenics=2019.1" "python-gmsh=4.11.1"
     - conda activate bvpy