From c9d42c8bea47cf344bd98f85994d693d42d89314 Mon Sep 17 00:00:00 2001
From: Florian Bruhin <git@the-compiler.org>
Date: Tue, 21 Nov 2017 14:09:20 +0100
Subject: [PATCH] Enable strict overflow checking in tests

---
 tests/conftest.py | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/tests/conftest.py b/tests/conftest.py
index 0c28ed17b..9c52f6800 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -25,6 +25,7 @@ import os
 import sys
 import warnings
 
+import sip
 import pytest
 import hypothesis
 from PyQt5.QtCore import PYQT_VERSION
@@ -175,6 +176,12 @@ def pytest_configure(config):
     if config.webengine:
         import PyQt5.QtWebEngineWidgets
 
+    try:
+        # Added in sip 4.19.4
+        sip.enableoverflowchecking(True)
+    except AttributeError:
+        pass
+
 
 @pytest.fixture(scope='session', autouse=True)
 def check_display(request):