diff --git a/letsencrypt/le_util.py b/letsencrypt/le_util.py
index fe63c70af..64295a80f 100644
--- a/letsencrypt/le_util.py
+++ b/letsencrypt/le_util.py
@@ -10,6 +10,8 @@ import stat
 import subprocess
 import sys
 
+import configargparse
+
 from letsencrypt import errors
 
 
@@ -278,9 +280,11 @@ def add_deprecated_argument(add_argument, argument_name, nargs):
             sys.stderr.write(
                 "Use of {0} is deprecated.\n".format(option_string))
 
+    configargparse.ACTION_TYPES_THAT_DONT_NEED_A_VALUE.add(ShowWarning)
     add_argument(argument_name, action=ShowWarning,
                  help=argparse.SUPPRESS, nargs=nargs)
 
+
 def check_domain_sanity(domain):
     """Method which validates domain value and errors out if
     the requirements are not met.
diff --git a/letsencrypt/tests/cli_test.py b/letsencrypt/tests/cli_test.py
index e7ae5de23..2b56c5abe 100644
--- a/letsencrypt/tests/cli_test.py
+++ b/letsencrypt/tests/cli_test.py
@@ -551,6 +551,11 @@ class CLITest(unittest.TestCase):  # pylint: disable=too-many-public-methods
         self.assertEqual(path, os.path.abspath(path))
         self.assertEqual(contents, test_contents)
 
+    def test_agree_dev_preview_config(self):
+        with MockedVerb('run') as mocked_run:
+            self._call(['-c', test_util.vector_path('cli.ini')])
+        self.assertTrue(mocked_run.called)
+
 
 class DetermineAccountTest(unittest.TestCase):
     """Tests for letsencrypt.cli._determine_account."""
diff --git a/letsencrypt/tests/testdata/cli.ini b/letsencrypt/tests/testdata/cli.ini
new file mode 100644
index 000000000..8ef506071
--- /dev/null
+++ b/letsencrypt/tests/testdata/cli.ini
@@ -0,0 +1 @@
+agree-dev-preview = True