diff --git a/test/zdtm.py b/test/zdtm.py
index 0bd7b84cc..ac8d7bee0 100755
--- a/test/zdtm.py
+++ b/test/zdtm.py
@@ -1885,7 +1885,7 @@ class Launcher:
                 pid, status = os.waitpid(0, flags)
             except OSError as e:
                 if e.errno == errno.EINTR:
-                    subprocess.Popen(["ps", "axf"]).wait()
+                    subprocess.Popen(["ps", "axf", "--width", "160"]).wait()
                     continue
                 signal.alarm(0)
                 raise e