diff --git a/src/lib/dhcpsrv/tests/cql_host_data_source_unittest.cc b/src/lib/dhcpsrv/tests/cql_host_data_source_unittest.cc
index 05a9401ba7..1ac07352e4 100644
--- a/src/lib/dhcpsrv/tests/cql_host_data_source_unittest.cc
+++ b/src/lib/dhcpsrv/tests/cql_host_data_source_unittest.cc
@@ -70,6 +70,7 @@ public:
         }
 
         hdsptr_ = HostMgr::instance().getHostDataSource();
+        hdsptr_->setIPReservationUnique(true);
     }
 
     /// @brief Destroys the HDS and the schema.
diff --git a/src/lib/dhcpsrv/tests/mysql_host_data_source_unittest.cc b/src/lib/dhcpsrv/tests/mysql_host_data_source_unittest.cc
index 4e7ece4fd4..f6334e2dc5 100644
--- a/src/lib/dhcpsrv/tests/mysql_host_data_source_unittest.cc
+++ b/src/lib/dhcpsrv/tests/mysql_host_data_source_unittest.cc
@@ -62,6 +62,8 @@ public:
         }
 
         hdsptr_ = HostMgr::instance().getHostDataSource();
+        hdsptr_->setIPReservationUnique(true);
+
 
         MultiThreadingMgr::instance().setMode(false);
     }
diff --git a/src/lib/dhcpsrv/tests/pgsql_host_data_source_unittest.cc b/src/lib/dhcpsrv/tests/pgsql_host_data_source_unittest.cc
index 9e490cbe91..2baac370a9 100644
--- a/src/lib/dhcpsrv/tests/pgsql_host_data_source_unittest.cc
+++ b/src/lib/dhcpsrv/tests/pgsql_host_data_source_unittest.cc
@@ -62,6 +62,7 @@ public:
         }
 
         hdsptr_ = HostMgr::instance().getHostDataSource();
+        hdsptr_->setIPReservationUnique(true);
 
         MultiThreadingMgr::instance().setMode(false);
     }