diff --git a/test/functional/requirements.txt b/test/functional/requirements.txt
index daaa74f..e09bcdb 100644
--- a/test/functional/requirements.txt
+++ b/test/functional/requirements.txt
@@ -1,2 +1,3 @@
 attotime>=0.2.0
 schema==0.7.2
+recordclass>=0.8.4