diff --git a/ci/matrix.yaml b/ci/matrix.yaml
index 3653930095e..b47bbabbcd4 100644
--- a/ci/matrix.yaml
+++ b/ci/matrix.yaml
@@ -61,6 +61,7 @@ workflows:
     - {jobs: ['test'],                    project: ['libcudacxx', 'cudax'], std: 'max', gpu: 'h100' }
     # Multi-GPU coverage:
     - {jobs: ['test'], project: 'libcudacxx', std: 'max', gpu: 'h100_2gpu', sm: 'gpu'}
+    - {jobs: ['test'], project: 'cudax',      std: 'max', gpu: 'h100_2gpu', sm: 'gpu'}
     # RTX PRO 6000 coverage (limited due to small number of runners):
     - {jobs: ['test_lid0'], project: 'cub', std: 'max', cxx: 'gcc', gpu: 'rtxpro6000'}
     # Misc: