diff --git a/tests/test_data_account.py b/tests/test_data_account.py
new file mode 100644
index 0000000000000000000000000000000000000000..a3a619dcf139cc056b42c89501c67f41e1342fa3
--- /dev/null
+++ b/tests/test_data_account.py
@@ -0,0 +1,32 @@
+"""Test Account class"""
+# Copyright © 2020  Brett Smith
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+import pytest
+
+from conservancy_beancount import data
+
+@pytest.mark.parametrize('acct_name,under_arg,expected', [
+    ('Expenses:Tax:Sales', 'Expenses:Tax:Sales:', False),
+    ('Expenses:Tax:Sales', 'Expenses:Tax:Sales', True),
+    ('Expenses:Tax:Sales', 'Expenses:Tax:', True),
+    ('Expenses:Tax:Sales', 'Expenses:Tax', True),
+    ('Expenses:Tax:Sales', 'Expenses:', True),
+    ('Expenses:Tax:Sales', 'Expenses', True),
+    ('Expenses:Tax:Sales', 'Accrued:', False),
+    ('Expenses:Tax:Sales', 'Accrued', False),
+])
+def test_is_under(acct_name, under_arg, expected):
+    assert data.Account(acct_name).is_under(under_arg) == expected