Load articles/snippets as binary strings

tests/utils.py

@@ -12,12 +12,12 @@ TEST_DIR = abspath(dirname(__file__))
 def load_snippet(file_name):
     """Helper to fetch in the content of a test snippet."""
     file_path = join(TEST_DIR, "data/snippets", file_name)
-    with open(file_path) as file:
+    with open(file_path, "rb") as file:
         return file.read()
 
 
 def load_article(file_name):
     """Helper to fetch in the content of a test article."""
     file_path = join(TEST_DIR, "data/articles", file_name)
-    with open(file_path) as file:
+    with open(file_path, "rb") as file:
         return file.read()