diff --git a/neutron/tests/contrib/hooks/api_all_extensions b/neutron/tests/contrib/hooks/api_all_extensions
index e804ce3d7bd..b891fdcee05 100644
--- a/neutron/tests/contrib/hooks/api_all_extensions
+++ b/neutron/tests/contrib/hooks/api_all_extensions
@@ -1 +1,45 @@
-NETWORK_API_EXTENSIONS="address-scope,agent,allowed-address-pairs,auto-allocated-topology,availability_zone,binding,default-subnetpools,dhcp_agent_scheduler,dns-integration,dvr,ext-gw-mode,external-net,extra_dhcp_opt,extraroute,flavors,l3-flavors,l3-ha,l3_agent_scheduler,metering,multi-provider,net-mtu,network-ip-availability,network_availability_zone,pagination,port-security,project-id,provider,qos,quotas,rbac-policies,router,router_availability_zone,security-group,service-type,sorting,standard-attr-description,standard-attr-revisions,standard-attr-timestamp,subnet_allocation,tag,tag-ext,trunk,trunk-details"
+# Keep entries alphabetically
+# NOTE: The first entry should not use '+=' and a comma.
+NETWORK_API_EXTENSIONS="address-scope"
+NETWORK_API_EXTENSIONS+=",agent"
+NETWORK_API_EXTENSIONS+=",allowed-address-pairs"
+NETWORK_API_EXTENSIONS+=",auto-allocated-topology"
+NETWORK_API_EXTENSIONS+=",availability_zone"
+NETWORK_API_EXTENSIONS+=",binding"
+NETWORK_API_EXTENSIONS+=",default-subnetpools"
+NETWORK_API_EXTENSIONS+=",dhcp_agent_scheduler"
+NETWORK_API_EXTENSIONS+=",dns-integration"
+NETWORK_API_EXTENSIONS+=",dvr"
+NETWORK_API_EXTENSIONS+=",ext-gw-mode"
+NETWORK_API_EXTENSIONS+=",external-net"
+NETWORK_API_EXTENSIONS+=",extra_dhcp_opt"
+NETWORK_API_EXTENSIONS+=",extraroute"
+NETWORK_API_EXTENSIONS+=",flavors"
+NETWORK_API_EXTENSIONS+=",l3-flavors"
+NETWORK_API_EXTENSIONS+=",l3-ha"
+NETWORK_API_EXTENSIONS+=",l3_agent_scheduler"
+NETWORK_API_EXTENSIONS+=",metering"
+NETWORK_API_EXTENSIONS+=",multi-provider"
+NETWORK_API_EXTENSIONS+=",net-mtu"
+NETWORK_API_EXTENSIONS+=",network-ip-availability"
+NETWORK_API_EXTENSIONS+=",network_availability_zone"
+NETWORK_API_EXTENSIONS+=",pagination"
+NETWORK_API_EXTENSIONS+=",port-security"
+NETWORK_API_EXTENSIONS+=",project-id"
+NETWORK_API_EXTENSIONS+=",provider"
+NETWORK_API_EXTENSIONS+=",qos"
+NETWORK_API_EXTENSIONS+=",quotas"
+NETWORK_API_EXTENSIONS+=",rbac-policies"
+NETWORK_API_EXTENSIONS+=",router"
+NETWORK_API_EXTENSIONS+=",router_availability_zone"
+NETWORK_API_EXTENSIONS+=",security-group"
+NETWORK_API_EXTENSIONS+=",service-type"
+NETWORK_API_EXTENSIONS+=",sorting"
+NETWORK_API_EXTENSIONS+=",standard-attr-description"
+NETWORK_API_EXTENSIONS+=",standard-attr-revisions"
+NETWORK_API_EXTENSIONS+=",standard-attr-timestamp"
+NETWORK_API_EXTENSIONS+=",subnet_allocation"
+NETWORK_API_EXTENSIONS+=",tag"
+NETWORK_API_EXTENSIONS+=",tag-ext"
+NETWORK_API_EXTENSIONS+=",trunk"
+NETWORK_API_EXTENSIONS+=",trunk-details"