diff --git a/.github/workflows/Downstream.yml b/.github/workflows/Downstream.yml
index c55af9a3..2e2eec5f 100644
--- a/.github/workflows/Downstream.yml
+++ b/.github/workflows/Downstream.yml
@@ -25,10 +25,8 @@ jobs:
         package:
           - 'ClimaAtmos.jl'
           - 'ClimaCoupler.jl'
-          - 'ClimaDiagnostics.jl'
           - 'ClimaLand.jl'
           - 'KinematicDriver.jl'
-          - 'ClimaDiagnostics.jl'
     steps:
       - uses: actions/checkout@v4
       - uses: julia-actions/setup-julia@v2
@@ -40,3 +38,7 @@ jobs:
         with:
           repository: 'CliMA/${{ matrix.package }}'
           path: ${{ matrix.package }}
+      - run: |
+          julia --color=yes --project=${{ matrix.package }} -e 'using Pkg; Pkg.instantiate()'
+          julia --color=yes --project=${{ matrix.package }} -e 'using Pkg; Pkg.develop(; path = ".")'
+          julia --color=yes --project=${{ matrix.package }} -e 'using Pkg; Pkg.test()'