diff --git a/tests/__init__.py b/tests/__init__.py
index a891b6c..b46456c 100644
--- a/tests/__init__.py
+++ b/tests/__init__.py
@@ -1,10 +1,15 @@
 import datetime
+import decimal
 import io
 import pathlib
 import random
 
 import pytest
 
+from oxrlib import __main__ as oxrmain
+
+decimal.setcontext(oxrmain.decimal_context())
+
 TEST_DIR = pathlib.Path(__file__).parent
 
 class StringIO(io.StringIO):