diff --git a/tempest/cmd/config-generator.tempest.conf b/tempest/cmd/config-generator.tempest.conf
index 49ad62dc59..b8f16d92d5 100644
--- a/tempest/cmd/config-generator.tempest.conf
+++ b/tempest/cmd/config-generator.tempest.conf
@@ -3,5 +3,3 @@ output_file = etc/tempest.conf.sample
 namespace = tempest.config
 namespace = oslo.concurrency
 namespace = oslo.log
-namespace = oslo.serialization
-namespace = oslo.utils