diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index e8d8a04..4302ebb 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -8,8 +8,16 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v2
-    - name: Install packages
-      run: sudo scripts/ci/install.sh
-    - name: Build
-      run: scripts/ci/ci.sh
+    - name: Cache repository
+      uses: actions/cache@v4
+      with:
+        path: .git
+        key: repository-dir
+    - uses: actions/checkout@v4
+      with:
+        submodules: true
+    - name: Install Rust
+      run: rustup toolchain install stable --profile minimal
+    - uses: Swatinem/rust-cache@v2
+    - name: Test
+      run: cargo test --release
diff --git a/scripts/ci/github.sh b/scripts/ci/github.sh
new file mode 100755
index 0000000..31edbb9
--- /dev/null
+++ b/scripts/ci/github.sh
@@ -0,0 +1,41 @@
+#!/bin/sh
+
+set -o errexit
+set -o nounset
+
+cd "$(dirname "$0")"
+
+export PATH="${CARGO_HOME:-$HOME/.cargo}/bin:$PATH"
+
+git submodule update --init       \
+    ../../consensus-spec-tests    \
+    ../../eth2_libp2p             \
+    ../../grandine-snapshot-tests \
+    ../../slashing-protection-interchange-tests
+(
+    cd ../../consensus-spec-tests
+    git lfs pull
+)
+
+#curl                     \
+#    --fail               \
+#    --proto =https       \
+#    --show-error         \
+#    --silent             \
+#    --tlsv1.2            \
+#   https://sh.rustup.rs |
+#   sponge               |
+#   sh -s -- --no-modify-path -y
+
+# `cargo-fmt` must be run in the root of a crate. It appears to be a regression:
+# <https://github.com/rust-lang/rustfmt/issues/3647>
+# Running `cargo-fmt` with `--all` works too but takes noticeably longer. This explains why:
+# <https://github.com/rust-lang/rustfmt/issues/4247#issuecomment-644957261>
+(
+    cd ../..
+    cargo fmt -- --check
+)
+
+./clippy.bash --deny warnings
+cargo test --release --no-fail-fast
+./consensus-spec-tests-coverage.rb