diff --git a/trunner/target/armv7a9.py b/trunner/target/armv7a9.py
index 94b9f89a..1cbf479a 100644
--- a/trunner/target/armv7a9.py
+++ b/trunner/target/armv7a9.py
@@ -49,6 +49,7 @@ def _reboot_by_debugger(self):
                 "-c init; reset; continue",
             ],
         ).run()
+        self.dut.clear_buffer()
 
     def _reboot_soft(self):
         self._reboot_hard()