diff --git a/src/configmypy/tests/test_argparse_config.py b/src/configmypy/tests/test_argparse_config.py
index ce97d51..d614217 100644
--- a/src/configmypy/tests/test_argparse_config.py
+++ b/src/configmypy/tests/test_argparse_config.py
@@ -3,8 +3,8 @@
 
 
 TEST_CONFIG_DICT = {
-  'default': {'opt': {'optimizer': 'adam', 'lr': 0.1},
-              'data': {'dataset': 'ns', 'batch_size': 12}},
+        'default': {'opt': {'optimizer': 'adam', 'lr': 0.1, 'regularizer': True},
+              'data': {'dataset': 'ns', 'batch_size': 12, 'test_resolutions':[16,32]}},
   'test': {'opt': {'optimizer': 'SGD'}}
 }
 
@@ -17,12 +17,21 @@ def test_ArgparseConfig(monkeypatch):
     config.data.batch_size = 24
     assert config == args
     assert kwargs == {}
-
-    monkeypatch.setattr("sys.argv", ['test', '--data.batch_size', '24', '--config_name', 'test'])
+    
+    # test ability to infer None and iterables
+    monkeypatch.setattr("sys.argv", ['test', '--data.batch_size', '24',\
+                                    '--data.test_resolutions', '[8, None]',
+                                     '--opt.regularizer', 'False',
+                                     '--config_name', 'test'])
     config = Bunch(TEST_CONFIG_DICT['default'])
     parser = ArgparseConfig(infer_types=True, config_name=None)
     args, kwargs = parser.read_conf(config)
     config.data.batch_size = 24
+    assert args.data.test_resolutions == [8, None]
+    assert not args.opt.regularizer #boolean False, not 'False'
+
+    args.data.test_resolutions = [16,32]
+    args.opt.regularizer = True
     assert config == args
     assert kwargs == Bunch(dict(config_name='test'))
 
diff --git a/src/configmypy/type_inference.py b/src/configmypy/type_inference.py
index 9d0719a..7d6c5ed 100644
--- a/src/configmypy/type_inference.py
+++ b/src/configmypy/type_inference.py
@@ -114,7 +114,6 @@ def __call__(self, var):
         var: original variable (any type)
 
         """
-        print(f"{self.orig_type=} {var=}")
         if self.orig_type == bool:
             return infer_boolean(var, self.strict)
         elif self.orig_type == float or self.orig_type == int: