diff --git a/esphome/espota2.py b/esphome/espota2.py
index 36eb4d68ea..ba47e6af0d 100644
--- a/esphome/espota2.py
+++ b/esphome/espota2.py
@@ -286,11 +286,8 @@ def perform_ota(
         [RESPONSE_REQUEST_AUTH, RESPONSE_REQUEST_SHA256_AUTH, RESPONSE_AUTH_OK],
     )
 
-    if auth in _AUTH_METHODS:
-        hash_func, nonce_size, hash_name = _AUTH_METHODS[auth]
-        perform_auth(sock, password, hash_func, nonce_size, hash_name)
-    elif auth != RESPONSE_AUTH_OK:
-        raise OTAError(f"Unknown authentication method requested: 0x{auth:02X}")
+    hash_func, nonce_size, hash_name = _AUTH_METHODS[auth]
+    perform_auth(sock, password, hash_func, nonce_size, hash_name)
 
     # Set higher timeout during upload
     sock.settimeout(30.0)