diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 90a92f7..fe6603c 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -52,6 +52,7 @@ jobs:
 
       - name: Install server dependencies (for communication tests)
         run: |
+          pip install numpy
           pip install -e ".[dev]"
         working-directory: src/server