diff --git a/xarray/backends/zarr.py b/xarray/backends/zarr.py
index 50755ebf1f7..75a39f9306d 100644
--- a/xarray/backends/zarr.py
+++ b/xarray/backends/zarr.py
@@ -996,10 +996,7 @@ def set_variables(self, variables, check_encoding_set, writer, unlimited_dims=No
 
                     new_shape = list(zarr_array.shape)
                     new_shape[append_axis] += v.shape[append_axis]
-                    if _zarr_v3():
-                        zarr_array = zarr_array.resize(new_shape)
-                    else:
-                        zarr_array.resize(new_shape)
+                    zarr_array.resize(new_shape)
 
                 zarr_shape = zarr_array.shape