diff --git a/tests/utils/test_decorators.py b/tests/utils/test_decorators.py
index 6e37bd6ce0938..82c04bcd535b9 100644
--- a/tests/utils/test_decorators.py
+++ b/tests/utils/test_decorators.py
@@ -16,7 +16,7 @@
 # under the License.
 from __future__ import annotations
 
-from typing import TYPE_CHECKING, Any
+from typing import TYPE_CHECKING
 
 import pytest
 
@@ -117,13 +117,10 @@ def parse_python_source(task: Task, custom_operator_name: str | None = None) ->
     operator = task().operator
     if not hasattr(operator, "get_python_source"):
         pytest.skip(f"Operator {operator} does not have get_python_source method")
+
     if custom_operator_name:
-        update_custom_operator_name(operator, custom_operator_name)
+        custom_operator_name = (
+            custom_operator_name if custom_operator_name.startswith("@") else f"@{custom_operator_name}"
+        )
+        operator.__dict__["custom_operator_name"] = custom_operator_name
     return operator.get_python_source()
-
-
-def update_custom_operator_name(operator: Any, custom_operator_name: str):
-    custom_operator_name = (
-        custom_operator_name if custom_operator_name.startswith("@") else f"@{custom_operator_name}"
-    )
-    operator.__dict__["custom_operator_name"] = custom_operator_name