diff --git a/tests/requirements/mysql.txt b/tests/requirements/mysql.txt
index 18c098ae967..5fb40bcc0bc 100644
--- a/tests/requirements/mysql.txt
+++ b/tests/requirements/mysql.txt
@@ -1 +1,2 @@
-mysqlclient
+# Due to a bug that will be fixed in mysqlclient 1.3.7.
+mysqlclient <= 1.3.5