diff --git a/.evergreen/scripts/setup_tests.py b/.evergreen/scripts/setup_tests.py
index 7908836f50..939423ffcc 100644
--- a/.evergreen/scripts/setup_tests.py
+++ b/.evergreen/scripts/setup_tests.py
@@ -1,12 +1,10 @@
 from __future__ import annotations
 
 import base64
-import io
 import os
 import platform
 import shutil
 import stat
-import tarfile
 from pathlib import Path
 from urllib import request
 
@@ -117,9 +115,10 @@ def setup_libmongocrypt():
     LOGGER.info(f"Fetching {url}...")
     with request.urlopen(request.Request(url), timeout=15.0) as response:  # noqa: S310
         if response.status == 200:
-            fileobj = io.BytesIO(response.read())
-        with tarfile.open("libmongocrypt.tar.gz", fileobj=fileobj) as fid:
-            fid.extractall(Path.cwd() / "libmongocrypt")
+            with Path("libmongocrypt.tar.gz").open("wb") as f:
+                f.write(response.read())
+            Path("libmongocrypt").mkdir()
+            run_command("tar -xzf libmongocrypt.tar.gz -C libmongocrypt")
     LOGGER.info(f"Fetching {url}... done.")
 
     run_command("ls -la libmongocrypt")