diff --git a/flask_sslify.py b/flask_sslify.py
index 979dc72..d0e1c5d 100644
--- a/flask_sslify.py
+++ b/flask_sslify.py
@@ -42,7 +42,7 @@ class SSLify(object):
     def skip(self):
         """Checks the skip list."""
         # Should we skip?
-        if self.skip_list and isinstance(self.skip_list, list): 
+        if self.skip_list and isinstance(self.skip_list, list):
             for skip in self.skip_list:
                 if request.path.startswith('/{0}'.format(skip)):
                     return True
@@ -54,6 +54,7 @@ class SSLify(object):
         criteria = [
             request.is_secure,
             current_app.debug,
+            current_app.testing,
             request.headers.get('X-Forwarded-Proto', 'http') == 'https'
         ]