diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 2886d489c05..f1ff641128f 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -45,7 +45,7 @@ jobs:
       fail-fast: false  # If one platform fails, allow the rest to keep testing.
       matrix:
         rust: [stable]
-        python-version: [3.5, 3.6, 3.7, 3.8, 3.9, pypy3]
+        python-version: [3.5, 3.6, 3.7, 3.8, 3.9, 3.10-dev, pypy3]
         platform: [
           { os: "macOS-latest",   python-architecture: "x64", rust-target: "x86_64-apple-darwin" },
           { os: "ubuntu-latest", python-architecture: "x64", rust-target: "x86_64-unknown-linux-gnu" },