diff --git a/flytekit/core/interface.py b/flytekit/core/interface.py
index 767ebb7bf8..7faf541661 100644
--- a/flytekit/core/interface.py
+++ b/flytekit/core/interface.py
@@ -71,7 +71,7 @@ def __init__(
         if inputs:
             for k, v in inputs.items():
                 if not k.isidentifier():
-                    raise ValueError(f'Input name must be valid Python identifier: {k!r}')
+                    raise ValueError(f"Input name must be valid Python identifier: {k!r}")
                 if type(v) is tuple and len(cast(Tuple, v)) > 1:
                     self._inputs[k] = v  # type: ignore
                 else: