diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 521e3f6..96ea814 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -70,3 +70,20 @@ jobs:
       - run: cargo add serde_as
 
       - run: cargo clippy
+
+  cache:
+    name: Cache
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - id: toolchain
+        name: Install Rust
+        uses: ./
+        with:
+          components: clippy
+          cache: true
+          cache-workspaces: |-
+            ./test-workspace
+
+      - run: cargo clippy
diff --git a/test-workspace/Cargo.lock b/test-workspace/Cargo.lock
new file mode 100644
index 0000000..f0ff31f
--- /dev/null
+++ b/test-workspace/Cargo.lock
@@ -0,0 +1,16 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "ci"
+version = "0.1.0"
+dependencies = [
+ "serde_as",
+]
+
+[[package]]
+name = "serde_as"
+version = "0.0.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4ee4afe4c5c3b69699c4267ae42b838e911466d7ca0005046adc93ac95bb16dd"
diff --git a/test-workspace/Cargo.toml b/test-workspace/Cargo.toml
new file mode 100644
index 0000000..431b03d
--- /dev/null
+++ b/test-workspace/Cargo.toml
@@ -0,0 +1,9 @@
+[package]
+name = "ci"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+serde_as = "0.0.1"
diff --git a/test-workspace/src/main.rs b/test-workspace/src/main.rs
new file mode 100644
index 0000000..e7a11a9
--- /dev/null
+++ b/test-workspace/src/main.rs
@@ -0,0 +1,3 @@
+fn main() {
+    println!("Hello, world!");
+}