diff --git a/scenes/download.py b/scenes/download.py
index 7be738e77217f38b7ad176b2d042c02d3b2ca1d9..d36b7c57c99220dfeb3fa9a501026cc2f18172ac 100644
--- a/scenes/download.py
+++ b/scenes/download.py
@@ -8,7 +8,7 @@ import json
 from urllib.parse import urlencode
 
 
-def curl_url(url, postdata, verbose=False, fp=None, header=['Accept:application/json']):
+def curl_url(url, postdata, verbose=False, fp=None, header=('Accept:application/json')):
     """
     Use PyCurl to make some requests
     :param url: url
diff --git a/test/download_test.py b/test/download_test.py
index 7bc93c79fd06c0a3c57ce7a1acf3274b62b49a33..feeb11df80cd08cb07026a78a2c0cf4c5e912975 100644
--- a/test/download_test.py
+++ b/test/download_test.py
@@ -1,5 +1,6 @@
 import argparse
 from scenes import download, utils
+import datetime
 
 # Arguments
 parser = argparse.ArgumentParser(description="Download test",)
@@ -9,4 +10,4 @@ params = parser.parse_args()
 
 # Get all scenes in the root_dir
 _, _, bbox = utils.get_epsg_extent_bbox(params.refimage)
-download.download(config_file=params.theia_cfg, acq_envelope=bbox, acq_date='01-01-2021')
\ No newline at end of file
+download.download(config_file=params.theia_cfg, acq_envelope=bbox, acq_date=datetime.datetime(year=2020, month=01, day=01))
\ No newline at end of file