diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index d57134e57..446e162bf 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -35,6 +35,7 @@ jobs:
 
     env:
       MIX_ENV: test
+      CARGO_REGISTRIES_CRATES_IO_PROTOCOL: sparse
 
     steps:
       - uses: actions/checkout@v3