diff --git a/tests/test_data_account.py b/tests/test_data_account.py
index 5c312eb254e1285763e12d5e9979056c529047a1..3b92fcde6de1c214858452c16dfdd48203c2360c 100644
--- a/tests/test_data_account.py
+++ b/tests/test_data_account.py
@@ -21,6 +21,7 @@ from . import testutil
 from datetime import date as Date
 
 from beancount.core.data import Open, Close, Booking
+from beancount.parser import options as bc_options
 
 from conservancy_beancount import data
 
@@ -267,3 +268,48 @@ def test_load_openings_and_closings(clean_account_meta):
     check_account_meta('Income:Donations', entries[0])
     check_account_meta('Income:Other', entries[1])
     check_account_meta('Assets:Checking', entries[2], entries[-1])
+
+@pytest.mark.parametrize('account_s', [
+    'Assets:Bank:Checking',
+    'Equity:Funds:Restricted',
+    'Expenses:Other',
+    'Income:Donations',
+    'Liabilities:CreditCard:Visa',
+])
+def test_is_account(account_s):
+    assert data.Account.is_account(account_s)
+
+@pytest.mark.parametrize('account_s', [
+    'Assets:Bank:12-345',
+    'Equity:Funds:Restricted',
+    'Expenses:Other',
+    'Income:Donations',
+    'Liabilities:CreditCard:Visa0123',
+])
+def test_is_account(clean_account_meta, account_s):
+    assert data.Account.is_account(account_s)
+
+@pytest.mark.parametrize('account_s', [
+    'Assets:checking',
+    'Assets::Cash',
+    'Equity',
+    'Liabilities:Credit Card',
+    'income:Donations',
+    'Expenses:Banking_Fees',
+    'Revenue:Grants',
+])
+def test_is_not_account(clean_account_meta, account_s):
+    assert not data.Account.is_account(account_s)
+
+@pytest.mark.parametrize('account_s,expected', [
+    ('Revenue:Donations', True),
+    ('Costs:Other', True),
+    ('Income:Donations', False),
+    ('Expenses:Other', False),
+])
+def test_is_account_respects_configured_roots(clean_account_meta, account_s, expected):
+    config = bc_options.OPTIONS_DEFAULTS.copy()
+    config['name_expenses'] = 'Costs'
+    config['name_income'] = 'Revenue'
+    data.Account.load_options_map(config)
+    assert data.Account.is_account(account_s) == expected