diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index eab2547..1cce2af 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -34,9 +34,6 @@ jobs:
           - 1.51.0  # Oldest supported with ptr::addr_of!
           - 1.65.0  # Oldest supported with stable const evaluation (sans cell)
           - 1.77.0  # Oldest supported with native `offset_of!`
-          - stable
-          - beta
-          - nightly
     steps:
       - uses: actions/checkout@v4
       - uses: dtolnay/rust-toolchain@master