1 files changed, 7 insertions, 0 deletions
diff --git a/test/regression/issue/006467.test.ts b/test/regression/issue/006467.test.ts
new file mode 100644
index 000000000..9a9ad8a2d
--- /dev/null
+++ b/test/regression/issue/006467.test.ts
@@ -0,0 +1,7 @@
+import { test, expect } from "bun:test";
+
+test("write(value >= 0x80)", () => {
+  const buffer = Buffer.alloc(1);
+  buffer.write("\x80", "binary");
+  expect(buffer[0]).toBe(0x80);
+});