diff --git a/lib/ceilometer b/lib/ceilometer
index f03bab21fc..8fff91058c 100644
--- a/lib/ceilometer
+++ b/lib/ceilometer
@@ -108,7 +108,7 @@ function create_ceilometer_accounts {
     # Ceilometer
     if [[ "$ENABLED_SERVICES" =~ "ceilometer-api" ]]; then
 
-        create_service_user "ceilometer" "admin"
+        create_service_user "ceilometer"
 
         if [[ "$KEYSTONE_CATALOG_BACKEND" = 'sql' ]]; then
             local ceilometer_service=$(get_or_create_service "ceilometer" \
diff --git a/lib/cinder b/lib/cinder
index 12ba51e49b..17a0cc3c1a 100644
--- a/lib/cinder
+++ b/lib/cinder
@@ -333,7 +333,7 @@ function create_cinder_accounts {
     # Cinder
     if [[ "$ENABLED_SERVICES" =~ "c-api" ]]; then
 
-        create_service_user "cinder" "admin"
+        create_service_user "cinder"
 
         if [[ "$KEYSTONE_CATALOG_BACKEND" = 'sql' ]]; then
 
diff --git a/lib/ironic b/lib/ironic
index 921bcf1a26..bed816e5c5 100644
--- a/lib/ironic
+++ b/lib/ironic
@@ -362,7 +362,7 @@ function create_ironic_accounts {
     if [[ "$ENABLED_SERVICES" =~ "ir-api" ]]; then
         # Get ironic user if exists
 
-        create_service_user "ironic" "admin"
+        create_service_user "ironic"
 
         if [[ "$KEYSTONE_CATALOG_BACKEND" = 'sql' ]]; then
 
diff --git a/lib/nova b/lib/nova
index c760066f15..6a149af322 100644
--- a/lib/nova
+++ b/lib/nova
@@ -356,6 +356,8 @@ function create_nova_accounts {
     # Nova
     if [[ "$ENABLED_SERVICES" =~ "n-api" ]]; then
 
+        # NOTE(jamielennox): Nova doesn't need the admin role here, however neutron uses
+        # this service user when notifying nova of changes and that requires the admin role.
         create_service_user "nova" "admin"
 
         if [[ "$KEYSTONE_CATALOG_BACKEND" = 'sql' ]]; then
diff --git a/lib/sahara b/lib/sahara
index b3ca32f346..db200cca10 100644
--- a/lib/sahara
+++ b/lib/sahara
@@ -61,7 +61,7 @@ TEMPEST_SERVICES+=,sahara
 # service     sahara    admin
 function create_sahara_accounts {
 
-    create_service_user "sahara" "admin"
+    create_service_user "sahara"
 
     if [[ "$KEYSTONE_CATALOG_BACKEND" = 'sql' ]]; then
 
diff --git a/lib/swift b/lib/swift
index d9f750c27f..31a1ba1d20 100644
--- a/lib/swift
+++ b/lib/swift
@@ -603,7 +603,7 @@ function create_swift_accounts {
 
     local another_role=$(openstack role list | awk "/ anotherrole / { print \$2 }")
 
-    create_service_user "swift" "admin"
+    create_service_user "swift"
 
     if [[ "$KEYSTONE_CATALOG_BACKEND" = 'sql' ]]; then
 
diff --git a/lib/trove b/lib/trove
index d32c7765e0..e1b307a52f 100644
--- a/lib/trove
+++ b/lib/trove
@@ -81,7 +81,7 @@ function setup_trove_logging {
 function create_trove_accounts {
     if [[ "$ENABLED_SERVICES" =~ "trove" ]]; then
 
-        create_service_user "trove" "admin"
+        create_service_user "trove"
 
         if [[ "$KEYSTONE_CATALOG_BACKEND" = 'sql' ]]; then
 
diff --git a/lib/zaqar b/lib/zaqar
index 8b560bb4d5..4a24415248 100644
--- a/lib/zaqar
+++ b/lib/zaqar
@@ -215,7 +215,7 @@ function stop_zaqar {
 }
 
 function create_zaqar_accounts {
-    create_service_user "zaqar" "admin"
+    create_service_user "zaqar"
 
     if [[ "$KEYSTONE_CATALOG_BACKEND" = 'sql' ]]; then