diff --git a/support/testing/infra/emulator.py b/support/testing/infra/emulator.py
index 7ba1390ea5..53876f828c 100644
--- a/support/testing/infra/emulator.py
+++ b/support/testing/infra/emulator.py
@@ -101,6 +101,8 @@ class Emulator(object):
         if index != 0:
             raise SystemError("Cannot login")
         self.run("dmesg -n 1")
+        # Prevent the shell from wrapping the commands at 80 columns.
+        self.run("stty columns 29999")
 
     # Run the given 'cmd' with a 'timeout' on the target
     # return a tuple (output, exit_code)