diff --git a/conftest.py b/conftest.py
index 09317ede..e3535236 100644
--- a/conftest.py
+++ b/conftest.py
@@ -4,8 +4,11 @@ import sys
 
 
 collect_ignore = []
-if sys.version_info[0] > 2 and sys.version_info[1] == 2:
-    collect_ignore.append("tests/handlers/logbook")
+if sys.version_info[0] > 2:
+    if sys.version_info[1] < 3:
+        collect_ignore.append("tests/contrib/flask")
+    if sys.version_info[1] == 2:
+        collect_ignore.append("tests/handlers/logbook")
 
 try:
     import gevent