diff --git a/reprounzip/reprounzip/utils.py b/reprounzip/reprounzip/utils.py
index cfa04c233..015e3619c 100644
--- a/reprounzip/reprounzip/utils.py
+++ b/reprounzip/reprounzip/utils.py
@@ -233,7 +233,7 @@ def check_output(*popenargs, **kwargs):
         cmd = kwargs.get('args')
         if cmd is None:
             cmd = [popenargs[0]]
-        raise subprocess.CalledProcessError(retcode, cmd, output=stdout)
+        raise subprocess.CalledProcessError(retcode, cmd)
     return stdout