From a7d211b53afbdb3c3febf881127dfbea4da422ee Mon Sep 17 00:00:00 2001
From: Waylan Limberg <waylan.limberg@icloud.com>
Date: Wed, 3 Jan 2018 20:29:48 -0500
Subject: Warnings should cause tests to fail.

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

diff --git a/tests/__init__.py b/tests/__init__.py
index f759ceb..6826ff3 100644
--- a/tests/__init__.py
+++ b/tests/__init__.py
@@ -2,6 +2,7 @@ import os
 import markdown
 import codecs
 import difflib
+import warnings
 try:
     import nose
 except ImportError as e:
@@ -179,4 +180,10 @@ def generate_all():
 
 
 def run():
+    # Warnings should cause tests to fail...
+    warnings.simplefilter('error')
+    # Except for the warnings that shouldn't
+    warnings.filterwarnings('default', category=PendingDeprecationWarning)
+    warnings.filterwarnings('default', category=DeprecationWarning, module='markdown')
+
     nose.main(addplugins=[HtmlOutput(), Markdown()])
-- 
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