diff --git a/tests/test_copebr.py b/tests/test_copebr.py
index 9511c79..5fdff3d 100644
--- a/tests/test_copebr.py
+++ b/tests/test_copebr.py
@@ -225,7 +225,7 @@ def test_final_dataframe_with_50_geocodes(self):
                 "pressao_min": dtype("float64"),
                 "precip_tot": dtype("float64"),
                 "geocodigo": dtype("int64"),
-                "epiweek": pd.StringDtype(storage="pyarrow"),
+                "epiweek": dtype("O"),
             },
         )