diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 7be466db0203ebd7f26b2731ac143d7fb40f4168..8ea5821bc11333b97e4e63feff51cb7ae42db906 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -1441,6 +1441,9 @@ clang_12.0_hybrid:
       WALBERLA_BUILD_WITH_CUDA: "OFF"
       WALBERLA_BUILD_WITH_CODEGEN: "ON"
       WALBERLA_BUILD_WITH_PYTHON: "ON"
+   only:
+      variables:
+         - $ENABLE_NIGHTLY_BUILDS
    tags:
       - docker
 
@@ -1460,6 +1463,9 @@ clang_12.0_serial_dbg:
       CMAKE_BUILD_TYPE: "DebugOptimized"
       WALBERLA_BUILD_WITH_CODEGEN: "ON"
       WALBERLA_BUILD_WITH_PYTHON: "ON"
+   only:
+      variables:
+         - $ENABLE_NIGHTLY_BUILDS
    tags:
       - docker
 
@@ -1477,6 +1483,9 @@ clang_12.0_mpionly_dbg:
       WALBERLA_BUILD_WITH_OPENMP: "OFF"
       WALBERLA_BUILD_WITH_CODEGEN: "ON"
       WALBERLA_BUILD_WITH_PYTHON: "ON"
+   only:
+      variables:
+         - $ENABLE_NIGHTLY_BUILDS
    tags:
       - docker
 
@@ -1493,12 +1502,137 @@ clang_12.0_hybrid_dbg:
       CMAKE_BUILD_TYPE: "DebugOptimized"
       WALBERLA_BUILD_WITH_CODEGEN: "ON"
       WALBERLA_BUILD_WITH_PYTHON: "ON"
+   only:
+      variables:
+         - $ENABLE_NIGHTLY_BUILDS
    tags:
       - docker
 
 clang_12.0_hybrid_dbg_sp:
    extends: .build_template
    image: i10git.cs.fau.de:5005/walberla/buildenvs/clang:12.0
+   variables:
+      WALBERLA_BUILD_WITH_CUDA: "OFF"
+      CMAKE_BUILD_TYPE: "DebugOptimized"
+      WALBERLA_DOUBLE_ACCURACY: "OFF"
+      WALBERLA_BUILD_WITH_PARMETIS: "OFF"
+      WALBERLA_BUILD_WITH_METIS: "OFF"
+   only:
+      variables:
+         - $ENABLE_NIGHTLY_BUILDS
+   tags:
+      - docker
+
+clang_13.0_serial:
+   extends: .build_template
+   image: i10git.cs.fau.de:5005/walberla/buildenvs/clang:13.0
+   before_script:
+      - pip3 install lbmpy==0.4.1 jinja2 pytest
+      - cd python
+      - python3 -m pytest --junitxml=report.xml pystencils_walberla lbmpy_walberla
+      - cd ..
+   variables:
+      WALBERLA_BUILD_WITH_CUDA: "OFF"
+      WALBERLA_BUILD_WITH_MPI: "OFF"
+      WALBERLA_BUILD_WITH_OPENMP: "OFF"
+      WALBERLA_BUILD_WITH_PARMETIS: "OFF"
+      WALBERLA_BUILD_WITH_CODEGEN: "ON"
+      WALBERLA_BUILD_WITH_PYTHON: "ON"
+   only:
+      variables:
+         - $ENABLE_NIGHTLY_BUILDS
+   tags:
+      - docker
+
+clang_13.0_mpionly:
+   extends: .build_template
+   image: i10git.cs.fau.de:5005/walberla/buildenvs/clang:13.0
+   before_script:
+      - pip3 install lbmpy==0.4.1 jinja2 pytest
+      - cd python
+      - python3 -m pytest --junitxml=report.xml pystencils_walberla lbmpy_walberla
+      - cd ..
+   variables:
+      WALBERLA_BUILD_WITH_CUDA: "OFF"
+      WALBERLA_BUILD_WITH_OPENMP: "OFF"
+      WALBERLA_BUILD_WITH_CODEGEN: "ON"
+      WALBERLA_BUILD_WITH_PYTHON: "ON"
+   only:
+      variables:
+         - $ENABLE_NIGHTLY_BUILDS
+   tags:
+      - docker
+
+clang_13.0_hybrid:
+   extends: .build_template
+   image: i10git.cs.fau.de:5005/walberla/buildenvs/clang:13.0
+   before_script:
+      - pip3 install lbmpy==0.4.1 jinja2 pytest
+      - cd python
+      - python3 -m pytest --junitxml=report.xml pystencils_walberla lbmpy_walberla
+      - cd ..
+   variables:
+      WALBERLA_BUILD_WITH_CUDA: "OFF"
+      WALBERLA_BUILD_WITH_CODEGEN: "ON"
+      WALBERLA_BUILD_WITH_PYTHON: "ON"
+   tags:
+      - docker
+
+clang_13.0_serial_dbg:
+   extends: .build_template
+   image: i10git.cs.fau.de:5005/walberla/buildenvs/clang:13.0
+   before_script:
+      - pip3 install lbmpy==0.4.1 jinja2 pytest
+      - cd python
+      - python3 -m pytest --junitxml=report.xml pystencils_walberla lbmpy_walberla
+      - cd ..
+   variables:
+      WALBERLA_BUILD_WITH_CUDA: "OFF"
+      WALBERLA_BUILD_WITH_MPI: "OFF"
+      WALBERLA_BUILD_WITH_OPENMP: "OFF"
+      WALBERLA_BUILD_WITH_PARMETIS: "OFF"
+      CMAKE_BUILD_TYPE: "DebugOptimized"
+      WALBERLA_BUILD_WITH_CODEGEN: "ON"
+      WALBERLA_BUILD_WITH_PYTHON: "ON"
+   tags:
+      - docker
+
+clang_13.0_mpionly_dbg:
+   extends: .build_template
+   image: i10git.cs.fau.de:5005/walberla/buildenvs/clang:13.0
+   before_script:
+      - pip3 install lbmpy==0.4.1 jinja2 pytest
+      - cd python
+      - python3 -m pytest --junitxml=report.xml pystencils_walberla lbmpy_walberla
+      - cd ..
+   variables:
+      WALBERLA_BUILD_WITH_CUDA: "OFF"
+      CMAKE_BUILD_TYPE: "DebugOptimized"
+      WALBERLA_BUILD_WITH_OPENMP: "OFF"
+      WALBERLA_BUILD_WITH_CODEGEN: "ON"
+      WALBERLA_BUILD_WITH_PYTHON: "ON"
+   tags:
+      - docker
+
+clang_13.0_hybrid_dbg:
+   extends: .build_template
+   image: i10git.cs.fau.de:5005/walberla/buildenvs/clang:13.0
+   before_script:
+      - pip3 install lbmpy==0.4.1 jinja2 pytest
+      - cd python
+      - python3 -m pytest --junitxml=report.xml pystencils_walberla lbmpy_walberla
+      - cd ..
+   variables:
+      WALBERLA_BUILD_WITH_CUDA: "OFF"
+      CMAKE_BUILD_TYPE: "DebugOptimized"
+      WALBERLA_BUILD_WITH_CODEGEN: "ON"
+      WALBERLA_BUILD_WITH_PYTHON: "ON"
+   tags:
+      - docker
+
+clang_13.0_hybrid_dbg_sp:
+   extends: .build_template
+   image: i10git.cs.fau.de:5005/walberla/buildenvs/clang:13.0
    stage: pretest
    variables:
       WALBERLA_BUILD_WITH_CUDA: "OFF"