diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index ec8f0f71c79ab9c5b43e45d47304e23db2a9cd29..b64117daf8257230e49ce1c955088a44707702b1 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -43,10 +43,6 @@ jobs:
       run: |
         python -m pip install wheel coverage
 
-    - name: "Install python-challenge-bypass-ristretto master@HEAD"
-      run: |
-        python -m pip install git+https://github.com/LeastAuthority/python-challenge-bypass-ristretto@master#egg=python-challenge-bypass-ristretto
-
     - name: "Install Tahoe-LAFS master@HEAD"
       run: |
         python -m pip install git+https://github.com/tahoe-lafs/tahoe-lafs@master#egg=tahoe-lafs