diff --git a/flepimop/gempyor_pkg/tests/utils/test_write_df.py b/flepimop/gempyor_pkg/tests/utils/test_write_df.py
index 314c24152..8f4e18baf 100644
--- a/flepimop/gempyor_pkg/tests/utils/test_write_df.py
+++ b/flepimop/gempyor_pkg/tests/utils/test_write_df.py
@@ -36,7 +36,7 @@ def test_raises_not_implemented_error(self) -> None:
                 write_df(fname=temp_file.name, df=self.sample_df)
         with pytest.raises(
             expected_exception=NotImplementedError,
-            match="Invalid extension txt. Must be 'csv' or 'parquet'.",
+            match=r".*Supported extensions are `.csv` or `.parquet`.",
         ) as _:
             with NamedTemporaryFile(suffix=".txt") as temp_file:
                 fname = temp_file.name[:-4]