diff --git a/contrib/ci/pre_test_hook.sh b/contrib/ci/pre_test_hook.sh
index 8c12857e51..1473e459e3 100755
--- a/contrib/ci/pre_test_hook.sh
+++ b/contrib/ci/pre_test_hook.sh
@@ -27,6 +27,10 @@ echo "TEMPEST_SERVICES+=,manila" >> $localrc_path
 echo "VOLUME_BACKING_FILE_SIZE=22G" >> $localrc_path
 echo "CINDER_LVM_TYPE=thin" >> $localrc_path
 
+# NOTE(vponomaryov): Set oversubscription ratio for Cinder LVM driver
+# bigger than 1.0, because in CI we do not need such small value.
+# It will allow us to avoid exceeding real capacity in CI test runs.
+echo "CINDER_OVERSUBSCRIPTION_RATIO=20.0" >> $localrc_path
 echo "MANILA_BACKEND1_CONFIG_GROUP_NAME=london" >> $localrc_path
 echo "MANILA_BACKEND2_CONFIG_GROUP_NAME=paris" >> $localrc_path
 echo "MANILA_SHARE_BACKEND1_NAME=LONDON" >> $localrc_path
diff --git a/devstack/plugin.sh b/devstack/plugin.sh
index 9a31aec262..1359c14e12 100755
--- a/devstack/plugin.sh
+++ b/devstack/plugin.sh
@@ -541,9 +541,21 @@ elif [[ "$1" == "stack" && "$2" == "post-config" ]]; then
     init_manila
     echo_summary "Installing extra libraries"
     install_libraries
+
+    # Neutron config update
     if is_service_enabled neutron; then
         iniset $Q_DHCP_CONF_FILE DEFAULT dnsmasq_local_resolv False
     fi
+
+    # Cinder config update
+    if [[ -n "$CINDER_OVERSUBSCRIPTION_RATIO" ]]; then
+        CINDER_CONF=${CINDER_CONF:-/etc/cinder/cinder.conf}
+        CINDER_ENABLED_BACKENDS=$(iniget $CINDER_CONF DEFAULT enabled_backends)
+        for BN in ${CINDER_ENABLED_BACKENDS//,/ }; do
+            iniset $CINDER_CONF $BN lvm_max_over_subscription_ratio $CINDER_OVERSUBSCRIPTION_RATIO
+        done
+        iniset $CINDER_CONF DEFAULT max_over_subscription_ratio $CINDER_OVERSUBSCRIPTION_RATIO
+    fi
 elif [[ "$1" == "stack" && "$2" == "extra" ]]; then
     echo_summary "Creating Manila entities for auth service"
     create_manila_accounts
diff --git a/devstack/settings b/devstack/settings
index 19cd121214..7641bdaa2f 100644
--- a/devstack/settings
+++ b/devstack/settings
@@ -20,6 +20,12 @@
 # 'MANILA_BACKEND1_CONFIG_GROUP_NAME' and 'MANILA_BACKEND2_CONFIG_GROUP_NAME'
 # to the env var 'MANILA_ENABLED_BACKENDS' or will be enabled
 # if 'MANILA_ENABLED_BACKENDS' is empty.
+#
+# 4) 'CINDER_OVERSUBSCRIPTION_RATIO' - manila devstack-plugin env var that is
+# useful for all share drivers that use Cinder. If it is set, then it will be
+# applied for two Cinder options: 'max_over_subscription_ratio' and
+# 'lvm_max_over_subscription_ratio'. Should be float. Example:
+# CINDER_OVERSUBSCRIPTION_RATIO=20.0
 
 
 # Defaults