fix test

Author: francesco086

test/unit_test/_cli/pack_test.py

@@ -63,7 +63,8 @@ def test_if_load_returns_wrong_type_then_error_contains_meaningful_info():
     result = invoke_dac_pack(load=get_path_to_return_wrong_type_load().as_posix())
     assert result.exit_code != 0
     error_message = str(result.exception)
-    assert "expected pd.DataFrame" in error_message
+    assert "Backend not found for backend" in error_message
+    assert "pandas" in error_message
 
 
 def test_if_load_miss_credentials_then_error_contains_meaningful_info():