Use uv venv in tests

.github/workflows/test.yml

@@ -111,7 +111,7 @@ jobs:
         run: |
           sudo rm -rf /usr/share/dotnet
           sudo rm -rf /opt/ghc
-      - name: Sccache Setup
+      - name: sccache Setup
         uses: mozilla-actions/[email protected]
         with:
           version: "v0.7.6"
@@ -136,7 +136,7 @@ jobs:
         if: ${{ !contains(matrix.platform.python-version, 'pypy') }}
         run: pip install cffi
       - name: Install python packages
-        run: pip install virtualenv ziglang~=0.10.0 twine uniffi-bindgen==0.27.0
+        run: pip install uv virtualenv ziglang~=0.10.0 twine uniffi-bindgen==0.27.0
       - uses: dtolnay/rust-toolchain@stable
         id: rustup
         with:

tests/common/mod.rs

@@ -136,7 +136,15 @@ pub fn create_virtualenv(name: &str, python_interp: Option<PathBuf>) -> Result<(
         fs::remove_dir_all(&venv_dir)?;
     }
 
-    let mut cmd = Command::new("virtualenv");
+    let mut cmd = {
+        if let Ok(uv) = which::which("uv") {
+            let mut cmd = Command::new(uv);
+            cmd.args(["venv", "--seed"]);
+            cmd
+        } else {
+            Command::new("virtualenv")
+        }
+    };
     if let Some(interp) = interp {
         cmd.arg("-p").arg(interp);
     }