diff --git a/test/conftest.py b/test/conftest.py
index 233a0921ef67d5b1a58c14619ece9a8b1fb9c129..92d8893fada48e02ef520e28c3599e1a7a6103a2 100644
--- a/test/conftest.py
+++ b/test/conftest.py
@@ -122,7 +122,7 @@ class FakerProvider(BaseProvider):
 
     def network_interface(self) -> str:
         interface = self.generator.random_choices(elements=("ge", "et", "xe"))[0]
-        number = self.generator.numerify("-%/%/%")
+        number = self.generator.numerify("-%/%%/%%")
         return f"{interface}{number}"
 
     def juniper_ae_interface_name(self) -> str: