diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 09f632c..7ab9581 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -36,10 +36,10 @@ jobs:
       - name: cargo build
         run: cargo build --all-targets --all-features
       - name: cargo test
-        run: cargo test --all-targets
+        run: cargo test --all-targets --all-features
       # https://github.com/rust-lang/cargo/issues/6669
       - name: cargo test --doc
-        run: cargo test --doc
+        run: cargo test --doc --all-features
   linting:
     name: Lints, pinned toolchain
     runs-on: ubuntu-latest
@@ -56,4 +56,4 @@ jobs:
       - name: cargo fmt (check)
         run: cargo fmt -- --check -l
       - name: cargo clippy (warnings)
-        run: cargo clippy --all-targets -- -D warnings
+        run: cargo clippy --all-targets --all-features -- -D warnings
diff --git a/Cargo.toml b/Cargo.toml
index 08dddb9..7d538a6 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -24,6 +24,7 @@ zstd = { version = "0.13.2", optional = true }
 
 [dev-dependencies]
 anyhow = "1.0.89"
+cap-tempfile = "3.3.0"
 
 [features]
 zstd = ["dep:zstd"]
diff --git a/examples/zstd.rs b/examples/zstd.rs
index 75c29e2..3b2fa2e 100644
--- a/examples/zstd.rs
+++ b/examples/zstd.rs
@@ -2,10 +2,11 @@
 fn main() {
     use std::{env, path::PathBuf};
 
+    use cap_tempfile::TempDir;
     use oci_spec::image::Platform;
-    use ocidir::{cap_std::fs::Dir, new_empty_manifest, OciDir};
-    let dir = Dir::open_ambient_dir(env::temp_dir(), ocidir::cap_std::ambient_authority()).unwrap();
-    let oci_dir = OciDir::ensure(dir).unwrap();
+    use ocidir::{new_empty_manifest, OciDir};
+    let dir = TempDir::new(ocidir::cap_std::ambient_authority()).unwrap();
+    let oci_dir = OciDir::ensure(dir.try_clone().unwrap()).unwrap();
 
     let mut manifest = new_empty_manifest().build().unwrap();
     let mut config = ocidir::oci_spec::image::ImageConfigurationBuilder::default()
diff --git a/src/lib.rs b/src/lib.rs
index 708cda6..25e84f7 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -281,7 +281,7 @@ impl OciDir {
     ///
     /// This method is only available when the `zstd` feature is enabled.
     pub fn create_layer_zstd(&self, compression_level: Option<i32>) -> Result<ZstdLayerWriter> {
-        Ok(ZstdLayerWriter::new(&self.dir, compression_level)?)
+        ZstdLayerWriter::new(&self.dir, compression_level)
     }
 
     #[cfg(feature = "zstdmt")]
@@ -298,11 +298,7 @@ impl OciDir {
         compression_level: Option<i32>,
         n_workers: u32,
     ) -> Result<ZstdLayerWriter> {
-        Ok(ZstdLayerWriter::multithread(
-            &self.dir,
-            compression_level,
-            n_workers,
-        )?)
+        ZstdLayerWriter::multithread(&self.dir, compression_level, n_workers)
     }
 
     /// Add a layer to the top of the image stack.  The firsh pushed layer becomes the root.