diff --git a/tests/test_Configuration.py b/tests/test_Configuration.py
index 7529a9f764774a0a297e6e3ca9c76523b99e22c6..52756ea5c5e8a60f63848a7dd2c88e6811d4b409 100644
--- a/tests/test_Configuration.py
+++ b/tests/test_Configuration.py
@@ -13,26 +13,24 @@ import oxrlib.loaders
 
 INI_DIR_PATH = relpath('config_ini')
 
-def config_from(ini_filename, arglist=None):
-    if arglist is None:
-        arglist = ['historical', any_date().isoformat()]
+def config_from(ini_filename, arglist):
     ini_path = INI_DIR_PATH / ini_filename
     return oxrlib.config.Configuration(['--config-file', ini_path.as_posix()] + arglist)
 
-def test_full_config():
-    config = config_from('full.ini')
+def test_full_config(any_date):
+    config = config_from('full.ini', ['historical', any_date.isoformat()])
     loaders = config.get_loaders().loaders
     assert type(loaders[0]) is oxrlib.loaders.FileCache
     assert type(loaders[1]) is oxrlib.loaders.OXRAPIRequest
     assert len(loaders) == 2
     assert type(config.cache) is oxrlib.cache.CacheWriter
 
-def test_incomplete_config():
-    config = config_from('incomplete.ini')
+def test_incomplete_config(any_date):
+    config = config_from('incomplete.ini', ['historical', any_date.isoformat()])
     assert not config.get_loaders().loaders
 
-def test_empty_config():
-    config = config_from(os.devnull)
+def test_empty_config(any_date):
+    config = config_from(os.devnull, ['historical', any_date.isoformat()])
     assert not config.get_loaders().loaders
 
 @pytest.mark.parametrize('ini_filename,expected_currency,use_switch', [