1 files changed, 9 insertions, 0 deletions
diff --git a/third_party/rust/nix/test/test_clearenv.rs b/third_party/rust/nix/test/test_clearenv.rs
new file mode 100644
index 0000000000..28a7768049
--- /dev/null
+++ b/third_party/rust/nix/test/test_clearenv.rs
@@ -0,0 +1,9 @@
+use std::env;
+
+#[test]
+fn clearenv() {
+    env::set_var("FOO", "BAR");
+    unsafe { nix::env::clearenv() }.unwrap();
+    assert_eq!(env::var("FOO").unwrap_err(), env::VarError::NotPresent);
+    assert_eq!(env::vars().count(), 0);
+}