diff --git a/tests/testutil.py b/tests/testutil.py
index 856bf596c23b9db0a49d2b694d65e796d36508e0..12331707d42f4d50425f62de2c6881c53b6a6aa3 100644
--- a/tests/testutil.py
+++ b/tests/testutil.py
@@ -30,7 +30,7 @@ from decimal import Decimal
 from pathlib import Path
 from typing import Any, Optional, NamedTuple
 
-from conservancy_beancount import books, rtutil
+from conservancy_beancount import books, data, rtutil
 
 EXTREME_FUTURE_DATE = datetime.date(datetime.MAXYEAR, 12, 30)
 FUTURE_DATE = datetime.date.today() + datetime.timedelta(days=365 * 99)
@@ -39,6 +39,12 @@ FY_MID_DATE = datetime.date(2020, 9, 1)
 PAST_DATE = datetime.date(2000, 1, 1)
 TESTS_DIR = Path(__file__).parent
 
+# This function is primarily used as a fixture, but different test files use
+# it with different scopes. Typical usage looks like:
+#   clean_account_meta = pytest.fixture([options])(testutil.clean_account_meta)
+def clean_account_meta():
+    data.Account._meta_map.clear()
+
 def _ods_cell_value_type(cell):
     assert cell.tagName == 'table:table-cell'
     return cell.getAttribute('valuetype')