diff --git a/src/frostfs_testlib/cli/frostfs_adm/morph.py b/src/frostfs_testlib/cli/frostfs_adm/morph.py
index 2958884..f3e0137 100644
--- a/src/frostfs_testlib/cli/frostfs_adm/morph.py
+++ b/src/frostfs_testlib/cli/frostfs_adm/morph.py
@@ -122,7 +122,9 @@ class FrostfsAdmMorph(CliCommand):
             **{param: param_value for param, param_value in locals().items() if param not in ["self"]},
         )
 
-    def force_new_epoch(self, rpc_endpoint: Optional[str] = None, alphabet_wallets: Optional[str] = None) -> CommandResult:
+    def force_new_epoch(
+        self, rpc_endpoint: Optional[str] = None, alphabet_wallets: Optional[str] = None, delta: Optional[int] = None
+    ) -> CommandResult:
         """Create new FrostFS epoch event in the side chain.
 
         Args: