diff --git a/test/case/interfaces/verify_all_interface_types/test.py b/test/case/interfaces/verify_all_interface_types/test.py
index 46346d98..1a96a315 100755
--- a/test/case/interfaces/verify_all_interface_types/test.py
+++ b/test/case/interfaces/verify_all_interface_types/test.py
@@ -19,10 +19,10 @@ slightly longer than sending the entire configuration at once.
 
 import infamy
 import infamy.iface as iface
-
+from infamy.util import until
 
 def verify_interface(target, interface, expected_type):
-    assert iface.exist(target, interface), f"Interface <{interface}> does not exist."
+    until(lambda: iface.exist(target, interface))
 
     expected_type = f"infix-if-type:{expected_type}"
     actual_type = iface.get_param(target, interface, "type")
diff --git a/test/case/interfaces/veth_delete/test.py b/test/case/interfaces/veth_delete/test.py
index 8bc1bd65..5993126e 100755
--- a/test/case/interfaces/veth_delete/test.py
+++ b/test/case/interfaces/veth_delete/test.py
@@ -13,7 +13,7 @@ from any other step.  This to trigger a new configuration "generation".
 
 import infamy
 import infamy.iface as iface
-
+from infamy.util import until
 
 with infamy.Test() as test:
     with test.step("Set up topology and attach to target DUT"):
@@ -51,10 +51,8 @@ with infamy.Test() as test:
         }})
 
     with test.step("Verify interfaces 'veth0a' and 'veth0b' exist"):
-        assert iface.exist(target, veth0a), \
-            f"Interface <{veth0a}> does not exist."
-        assert iface.exist(target, veth0b), \
-            f"Interface <{veth0b}> does not exist."
+        until(lambda: iface.exist(target, veth0a))
+        until(lambda: iface.exist(target, veth0b))
 
     with test.step("Set IP address on target:data1 (dummy op)"):
         target.put_config_dicts({"ietf-interfaces": {
@@ -94,10 +92,12 @@ with infamy.Test() as test:
             f"/ietf-interfaces:interfaces/interface[name='{veth0b}']",
         ])
 
-    with test.step("Verify VETH pair has been removed"):
-        assert not iface.exist(target, veth0a), \
-            f"Interface <{veth0a}> still exists!"
-        assert not iface.exist(target, veth0b), \
-            f"Interface <{veth0b}> still exists!"
+    with test.step("Verify target:data1 and target:data2 still exist"):
+        until(lambda: iface.exist(target, data1))
+        until(lambda: iface.exist(target, data2))
+
+    with test.step("Verify VETH pair have been removed"):
+        until(lambda: not iface.exist(target, veth0a))
+        until(lambda: not iface.exist(target, veth0b))
 
     test.succeed()