diff --git a/unittests/main.cpp b/unittests/main.cpp
index de434c0f..7287f2d6 100644
--- a/unittests/main.cpp
+++ b/unittests/main.cpp
@@ -39,6 +39,7 @@ TEST(BackendTest, Basic)
             boost::json::object postgresConfig{
                 {"database",
                  {{"type", "postgres"},
+                  {"experimental", true},
                   {"postgres",
                    {{"contact_point", "127.0.0.1"},
                     {"username", "postgres"},
@@ -1671,6 +1672,7 @@ TEST(Backend, cacheIntegration)
             boost::json::object postgresConfig{
                 {"database",
                  {{"type", "postgres"},
+                  {"experimental", true},
                   {"postgres",
                    {{"contact_point", "127.0.0.1"},
                     {"username", "postgres"},