diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 01412742b..8984f1057 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -169,34 +169,15 @@ jobs:
             env:
                 DOWNSTREAM_PROJECT: ${{ matrix.downstream_project }}
             run: |
-                # {{{ configure pyopencl so it finds its headers
+                curl -L -O https://tiker.net/ci-support-v0
+                . ./ci-support-v0
 
                 TEST_ENV_ROOT="$(pwd)/$DOWNSTREAM_PROJECT/.miniforge3/envs/testing"
                 ./configure.py --cl-inc-dir="$TEST_ENV_ROOT/include" --cl-lib-dir="$TEST_ENV_ROOT/lib"
                 git add -f siteconf.py
 
-                git config --global user.email "inform@tiker.net"
-                git config --global user.name "Github CI runner"
-                git commit -a -m "Fake commit to add aksetup.py"
-
-                # }}}
-
-                git clone "https://github.com/inducer/$DOWNSTREAM_PROJECT.git"
-
-                cd "$DOWNSTREAM_PROJECT"
-                echo "*** $DOWNSTREAM_PROJECT version: $(git rev-parse --short HEAD)"
-
-                sed -i "/egg=pyopencl/ c git+file://$(readlink -f ..)#egg=pyopencl" requirements.txt
-
-                export CONDA_ENVIRONMENT=.test-conda-env-py3.yml
-                sed -i 's/pyopencl/ocl-icd/' "$CONDA_ENVIRONMENT"
-
-                # Avoid slow or complicated tests in downstream projects
-                export PYTEST_ADDOPTS="-k 'not (slowtest or octave or mpi)'"
-
-                curl -L -O https://tiker.net/ci-support-v0
-                . ./ci-support-v0
-
+                prepare_downstream_build "$DOWNSTREAM_PROJECT"
+                sed -i 's/pyopencl/ocl-icd/' .test-conda-env-py3.yml
                 build_py_project_in_conda_env
                 test_py_project
 
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index d7f7aefe3..5d3ef6df6 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -256,3 +256,25 @@ Flake8:
   - python3
   except:
   - tags
+
+Downstream:
+  parallel:
+    matrix:
+    - DOWNSTREAM_PROJECT: [loopy, boxtree, meshmode]
+  tags:
+  - large-node
+  - "docker-runner"
+  script: |
+    curl -L -O https://tiker.net/ci-support-v0
+    . ./ci-support-v0
+
+    TEST_ENV_ROOT="$(pwd)/$DOWNSTREAM_PROJECT/.miniforge3/envs/testing"
+    ./configure.py --cl-inc-dir="$TEST_ENV_ROOT/include" --cl-lib-dir="$TEST_ENV_ROOT/lib"
+    git add -f siteconf.py
+
+    prepare_downstream_build "$DOWNSTREAM_PROJECT"
+    sed -i 's/pyopencl/ocl-icd/' .test-conda-env-py3.yml
+    build_py_project_in_conda_env
+    test_py_project
+
+# vim: sw=2