diff --git a/mls-rs-uniffi/Cargo.toml b/mls-rs-uniffi/Cargo.toml
index e7fb4919..45005ad8 100644
--- a/mls-rs-uniffi/Cargo.toml
+++ b/mls-rs-uniffi/Cargo.toml
@@ -24,3 +24,7 @@ uniffi = "0.26.0"
 
 [target.'cfg(mls_build_async)'.dependencies]
 tokio = { version = "1.36.0", features = ["sync"] }
+
+[dev-dependencies]
+tempfile = "3.10.0"
+uniffi_bindgen = "0.26.0"
diff --git a/mls-rs-uniffi/src/lib.rs b/mls-rs-uniffi/src/lib.rs
index c7221750..48eca2a0 100644
--- a/mls-rs-uniffi/src/lib.rs
+++ b/mls-rs-uniffi/src/lib.rs
@@ -17,6 +17,9 @@
 //!
 //! [UniFFI]: https://mozilla.github.io/uniffi-rs/
 
+#[cfg(test)]
+pub mod test_utils;
+
 use std::sync::Arc;
 
 #[cfg(not(mls_build_async))]
@@ -572,3 +575,20 @@ impl Group {
         }
     }
 }
+
+#[cfg(all(test, not(mls_build_async)))]
+mod sync_tests {
+    use crate::test_utils::run_python;
+
+    #[test]
+    fn test_generate_signature_keypair() -> Result<(), Box<dyn std::error::Error>> {
+        run_python(
+            r#"
+from mls_rs_uniffi import CipherSuite, generate_signature_keypair
+
+signature_keypair = generate_signature_keypair(CipherSuite.CURVE25519_AES128)
+assert signature_keypair.cipher_suite == CipherSuite.CURVE25519_AES128
+"#,
+        )
+    }
+}
diff --git a/mls-rs-uniffi/src/test_utils.rs b/mls-rs-uniffi/src/test_utils.rs
new file mode 100644
index 00000000..904443e7
--- /dev/null
+++ b/mls-rs-uniffi/src/test_utils.rs
@@ -0,0 +1,21 @@
+use uniffi_bindgen::bindings::python;
+
+/// Run Python code in `script`.
+///
+/// The script can use `import mls_rs_uniffi` to get access to the
+/// Python bindings.
+pub fn run_python(script: &str) -> Result<(), Box<dyn std::error::Error>> {
+    let tmp_dir = tempfile::TempDir::with_prefix("run-python-")?;
+    let script_path = tmp_dir.path().join("script.py");
+    std::fs::write(&script_path, script)?;
+
+    python::run_script(
+        tmp_dir.path().to_str().unwrap(),
+        "mls-rs-uniffi",
+        script_path.to_str().unwrap(),
+        vec![],
+        &uniffi_bindgen::bindings::RunScriptOptions::default(),
+    )?;
+
+    Ok(())
+}