diff --git a/tests/topotests/bgp_srv6l3vpn_to_bgp_vrf/r1/zebra.conf b/tests/topotests/bgp_srv6l3vpn_to_bgp_vrf/r1/zebra.conf
index 8defa0125a..8ccf7a2a34 100644
--- a/tests/topotests/bgp_srv6l3vpn_to_bgp_vrf/r1/zebra.conf
+++ b/tests/topotests/bgp_srv6l3vpn_to_bgp_vrf/r1/zebra.conf
@@ -27,7 +27,7 @@ segment-routing
  srv6
   locators
    locator loc1
-    prefix 2001:db8:1:1::/64
+    prefix 2001:db8:1:1::/64 func-bits 8
   !
  !
 !
diff --git a/tests/topotests/bgp_srv6l3vpn_to_bgp_vrf/r2/zebra.conf b/tests/topotests/bgp_srv6l3vpn_to_bgp_vrf/r2/zebra.conf
index 51d9c92235..839454d8a8 100644
--- a/tests/topotests/bgp_srv6l3vpn_to_bgp_vrf/r2/zebra.conf
+++ b/tests/topotests/bgp_srv6l3vpn_to_bgp_vrf/r2/zebra.conf
@@ -27,7 +27,7 @@ segment-routing
  srv6
   locators
    locator loc1
-    prefix 2001:db8:2:2::/64
+    prefix 2001:db8:2:2::/64 func-bits 8
   !
  !
 !
diff --git a/tests/topotests/bgp_srv6l3vpn_to_bgp_vrf2/r1/zebra.conf b/tests/topotests/bgp_srv6l3vpn_to_bgp_vrf2/r1/zebra.conf
index a43cec20ef..a9319a6aed 100644
--- a/tests/topotests/bgp_srv6l3vpn_to_bgp_vrf2/r1/zebra.conf
+++ b/tests/topotests/bgp_srv6l3vpn_to_bgp_vrf2/r1/zebra.conf
@@ -28,7 +28,7 @@ segment-routing
  srv6
   locators
    locator loc1
-    prefix 2001:db8:1:1::/64
+    prefix 2001:db8:1:1::/64 func-bits 8
   !
  !
 !
diff --git a/tests/topotests/bgp_srv6l3vpn_to_bgp_vrf2/r2/zebra.conf b/tests/topotests/bgp_srv6l3vpn_to_bgp_vrf2/r2/zebra.conf
index 71ddedf6ff..9e5fa0ac07 100644
--- a/tests/topotests/bgp_srv6l3vpn_to_bgp_vrf2/r2/zebra.conf
+++ b/tests/topotests/bgp_srv6l3vpn_to_bgp_vrf2/r2/zebra.conf
@@ -27,7 +27,7 @@ segment-routing
  srv6
   locators
    locator loc1
-    prefix 2001:db8:2:2::/64
+    prefix 2001:db8:2:2::/64 func-bits 8
   !
  !
 !