diff --git a/environments/low-memory-usage.yaml b/environments/low-memory-usage.yaml
index c81c672300..4431e31473 100644
--- a/environments/low-memory-usage.yaml
+++ b/environments/low-memory-usage.yaml
@@ -17,3 +17,7 @@ parameter_defaults:
       'nova::network::neutron::neutron_url_timeout': '60'
 
   DatabaseSyncTimeout: 900
+
+  # Override defaults to get HEALTH_OK with 1 OSD (for testing only)
+  CephPoolDefaultSize: 1
+  CephPoolDefaultPgNum: 32