diff --git a/tests/__init__.py b/tests/__init__.py
index a891b6c9cc42e5dbb6b165c03e88e17b0ef6c204..b46456c460275d32f53a053fedb5e57cd0660dea 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):