diff --git a/src/execution/process_pty.py b/src/execution/process_pty.py
index 48d1415a..43de6ec7 100644
--- a/src/execution/process_pty.py
+++ b/src/execution/process_pty.py
@@ -72,6 +72,8 @@ def pipe_process_output(self):
                     while True:
                         try:
                             chunk = os.read(self.pty_master, max_read_bytes)
+                            if not chunk:
+                                break
                             data += chunk
 
                         except BlockingIOError: