diff --git a/cesnet-central/deployments/fullhub.yaml b/cesnet-central/deployments/fullhub.yaml
index 9f698638d212a42355e2ca5911fe1b6303e9d103..137d2a49aa91e8be1fdeaee44f74a8d89ae94bbd 100644
--- a/cesnet-central/deployments/fullhub.yaml
+++ b/cesnet-central/deployments/fullhub.yaml
@@ -105,6 +105,7 @@ singleuser:
         exec jupyterhub-singleuser \
           --FileCheckpoints.checkpoint_dir='/home/jovyan/.notebookCheckpoints' \
           --LabApp.news_url=None \
+          --NotebookNotary.db_file=':memory:' \
           "$@"
 
 hub:
diff --git a/common/deployments/hub-staging.yaml b/common/deployments/hub-staging.yaml
index 2b73ab504ed2b23f879821552f92ec6c006fdc00..b2d5fcd537189fe92d44bf3042b4acb14310202f 100644
--- a/common/deployments/hub-staging.yaml
+++ b/common/deployments/hub-staging.yaml
@@ -123,6 +123,7 @@ singleuser:
         exec jupyterhub-singleuser \
           --FileCheckpoints.checkpoint_dir='/home/jovyan/.notebookCheckpoints' \
           --LabApp.news_url=None \
+          --NotebookNotary.db_file=':memory:' \
           "$@"
 
 hub:
diff --git a/testing/deployments/hub.yaml b/testing/deployments/hub.yaml
index f4ca97ba4efedfe95a25ea1a1196167f8b91773d..2a5c6824e1ddaa747f164d8668ba238f45cabb1a 100644
--- a/testing/deployments/hub.yaml
+++ b/testing/deployments/hub.yaml
@@ -124,6 +124,7 @@ singleuser:
         exec jupyterhub-singleuser \
           --FileCheckpoints.checkpoint_dir='/home/jovyan/.notebookCheckpoints' \
           --LabApp.news_url=None \
+          --NotebookNotary.db_file=':memory:' \
           "$@"
 
 hub: