diff --git a/.github/workflows/CI.yml b/.github/workflows/CI.yml
index b2d2eea..691a17c 100644
--- a/.github/workflows/CI.yml
+++ b/.github/workflows/CI.yml
@@ -56,6 +56,9 @@ jobs:
           JETQUERY_USERNAME='postgres'
           JETQUERY_PASSWORD='postgres'
           JETQUERY_DATABASE='test'
+          # Assume a small amount of connections are allowed
+          # into postgres
+          JETQUERY_POOL_SIZE=1
 
       - name: Build artifacts
         if: ${{ matrix.os == 'ubuntu-latest' }}