diff --git a/tools/process_registry.py b/tools/process_registry.py
index 8429a71e08..4ffa9923af 100644
--- a/tools/process_registry.py
+++ b/tools/process_registry.py
@@ -555,7 +555,7 @@ class ProcessRegistry:
             errors="replace",
             stdout=subprocess.PIPE,
             stderr=subprocess.STDOUT,
-            stdin=subprocess.PIPE,
+            stdin=subprocess.DEVNULL,
             preexec_fn=None if _IS_WINDOWS else os.setsid,
             creationflags=subprocess.CREATE_NO_WINDOW if _IS_WINDOWS else 0,
         )