PyO3 · messense · Mar 8, 2026 · Mar 7, 2026 · Mar 7, 2026 · Mar 7, 2026
diff --git a/.cirrus.yml b/.cirrus.yml
@@ -3,6 +3,7 @@ env:
   CARGO_INCREMENTAL: 0
   CARGO_TERM_COLOR: always
   CARGO_REGISTRIES_CRATES_IO_PROTOCOL: sparse
+  MATURIN_TEST_CLEANUP: 1
 
 build_and_test:
   &BUILD_AND_TEST # only run tasks on pull request or github merge queue branches
@@ -14,7 +15,8 @@ build_and_test:
   build_script:
     - cargo build
   test_script:
-    - cargo test
+    - curl -LsSf https://get.nexte.st/latest/freebsd | tar zxf - -C ${CARGO_HOME:-~/.cargo}/bin
+    - cargo nextest run
 
 freebsd_task:
   name: Test (x86_64 FreeBSD)

diff --git a/.gitignore b/.gitignore
@@ -18,4 +18,5 @@ tags
 test-crates/targets/
 test-crates/venvs/
 test-crates/wheels/
+test-crates/case-packages/
 venv*/
diff --git a/guide/src/contributing.md b/guide/src/contributing.md
@@ -96,10 +96,8 @@ You need to install `cffi` and `virtualenv` (`pip install cffi virtualenv`) to r
 You can set the `MATURIN_TEST_PYTHON` environment variable to run the tests against a specific Python version,
 for example `MATURIN_TEST_PYTHON=python3.11 cargo test` will run the tests against Python 3.11.
 
-There are some optional hacks that can speed up the tests (over 80s to 17s on my machine).
-1. By running `cargo build --release --manifest-path test-crates/cargo-mock/Cargo.toml` you can activate a cargo cache avoiding to rebuild the pyo3 test crates with every python version.
-2. Delete `target/test-cache` to clear the cache (e.g. after changing a test crate) or remove `test-crates/cargo-mock/target/release/cargo` to deactivate it.
-3. By running the tests with the `faster-tests` feature, binaries are stripped and wheels are only stored and not compressed.
+There is one optional hack that can speed up the tests.
+1. By running the tests with the `faster-tests` feature, binaries are stripped and wheels are only stored and not compressed.
 
 ## Releasing
 

diff --git a/test-crates/cargo-mock/Cargo.lock b/test-crates/cargo-mock/Cargo.lock
diff --git a/test-crates/cargo-mock/Cargo.toml b/test-crates/cargo-mock/Cargo.toml
diff --git a/test-crates/cargo-mock/src/main.rs b/test-crates/cargo-mock/src/main.rs
diff --git a/test-crates/cffi-mixed-implicit/.gitignore b/test-crates/cffi-mixed-implicit/.gitignore
@@ -0,0 +1 @@
+python/cffi_mixed_implicit/some_rust/rust/
diff --git a/test-crates/cffi-mixed-implicit/Cargo.lock b/test-crates/cffi-mixed-implicit/Cargo.lock
diff --git a/test-crates/cffi-mixed-implicit/Cargo.toml b/test-crates/cffi-mixed-implicit/Cargo.toml
@@ -0,0 +1,9 @@
+[package]
+name = "cffi-mixed-implicit"
+version = "0.1.0"
+authors = ["Armin Ronacher <armin.ronacher@active-4.com>"]
+edition = "2021"
+
+[lib]
+name = "cffi_mixed_implicit"
+crate-type = ["cdylib"]
diff --git a/test-crates/cffi-mixed-implicit/README.md b/test-crates/cffi-mixed-implicit/README.md
@@ -0,0 +1,17 @@
+# cffi-mixed-implicit
+
+This fixture exercises a mixed cffi/python package with an implicit namespace package
+and a Rust-backed submodule.
+
+```bash
+pip install .
+```
+
+```python
+import cffi_mixed_implicit.some_rust as some_rust
+
+point = some_rust.lib.get_origin()
+assert some_rust.lib.is_in_range(point, 0.0)
+```
+
+The install smoke test lives in `check_installed/check_installed.py`.