diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 0bdfd2c..9116641 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -16,6 +16,7 @@ env:
   CARGO_TERM_COLOR: always
   CARGO_BUILD_WARNINGS: deny
   RUST_BACKTRACE: full
+  SCCACHE_GHA_ENABLED: "true"
 
 concurrency:
   group: ${{ github.workflow }}-${{ github.head_ref || github.ref }}
@@ -112,10 +113,10 @@ jobs:
         with:
           persist-credentials: false
 
-      - name: Install stable Rust toolchain
+      - name: Install nightly Rust toolchain
         uses: dtolnay/rust-toolchain@2c7215f132e9ebf062739d9130488b56d53c060c # master
         with:
-          toolchain: stable
+          toolchain: nightly
 
       - name: Install sccache
         uses: mozilla-actions/sccache-action@fc920bf0ec8de6ee65d409111f7ec508035751ba # v0.0.11
diff --git a/Makefile b/Makefile
index 87d0a1a..6fd7d57 100644
--- a/Makefile
+++ b/Makefile
@@ -29,7 +29,7 @@ test-unit: ## Run deterministic unit and integration tests.
 
 .PHONY: test-doc
 test-doc: ## Run doc tests.
-	cargo test \
+	cargo +nightly test \
 		--doc \
 		--workspace \
 		--all-features \