diff --git a/anta/tests/routing/isis.py b/anta/tests/routing/isis.py
index 840c3f208..fa4374626 100644
--- a/anta/tests/routing/isis.py
+++ b/anta/tests/routing/isis.py
@@ -762,19 +762,19 @@ class VerifyISISGracefulRestart(AntaTest):
         - VerifyISISGracefulRestart:
             instances:
               - vrf: default
-                name: 1
+                name: '1'
                 graceful_restart: True
                 graceful_helper: True
               - vrf: default
-                name: 2
+                name: '2'
                 graceful_restart: True
                 graceful_helper: True
               - vrf: test
-                name: 1
+                name: '1'
                 graceful_restart: True
                 graceful_helper: True
               - vrf: test
-                name: 2
+                name: '2'
                 graceful_restart: True
                 graceful_helper: True
 
diff --git a/examples/tests.yaml b/examples/tests.yaml
index e432550eb..440456bbe 100644
--- a/examples/tests.yaml
+++ b/examples/tests.yaml
@@ -545,19 +545,19 @@ anta.tests.routing.isis:
       # Verifies the graceful restart and  helper mechanism.
       instances:
         - vrf: default
-          name: 1
+          name: '1'
           graceful_restart: True
           graceful_helper: True
         - vrf: default
-          name: 2
+          name: '2'
           graceful_restart: True
           graceful_helper: True
         - vrf: test
-          name: 1
+          name: '1'
           graceful_restart: True
           graceful_helper: True
         - vrf: test
-          name: 2
+          name: '2'
           graceful_restart: True
           graceful_helper: True