diff --git a/.github/workflows/deploy.yaml b/.github/workflows/deploy.yaml
index 2df78da..b4e2e55 100644
--- a/.github/workflows/deploy.yaml
+++ b/.github/workflows/deploy.yaml
@@ -146,7 +146,7 @@ jobs:
 
       - name: install test deps
         run: |
-          pip install pytest MDAnalysisTests
+          pip install pytest scikit-learn MDAnalysisTests
 
       - name: run_tests
         run: |