diff --git a/lldb/test/API/lit.cfg.py b/lldb/test/API/lit.cfg.py
index 6ef09f36a1907..06c685ebc3f5a 100644
--- a/lldb/test/API/lit.cfg.py
+++ b/lldb/test/API/lit.cfg.py
@@ -334,3 +334,9 @@ def delete_module_cache(path):
 # Propagate XDG_CACHE_HOME
 if "XDG_CACHE_HOME" in os.environ:
     config.environment["XDG_CACHE_HOME"] = os.environ["XDG_CACHE_HOME"]
+
+# Transfer some environment variables into the tests on Windows build host.
+if platform.system() == "Windows":
+    for v in ["SystemDrive"]:
+        if v in os.environ:
+            config.environment[v] = os.environ[v]