diff --git a/tests/test_reports_core.py b/tests/test_reports_core.py
new file mode 100644
index 0000000000000000000000000000000000000000..a0b8a03a3604aab4ec266fc9e2cecd4388603bda
--- /dev/null
+++ b/tests/test_reports_core.py
@@ -0,0 +1,66 @@
+"""test_reports_core - Unit tests for basic reports functions"""
+# 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 decimal import Decimal
+
+from . import testutil
+
+from conservancy_beancount.reports import core
+
+AMOUNTS = [
+    2,
+    Decimal('4.40'),
+    testutil.Amount('6.60', 'CHF'),
+    core.Balance([testutil.Amount('8.80')]),
+]
+
+@pytest.mark.parametrize('acct_name', [
+    'Assets:Checking',
+    'Assets:Receivable:Accounts',
+    'Expenses:Other',
+    'Expenses:FilingFees',
+])
+def test_normalize_amount_func_pos(acct_name):
+    actual = core.normalize_amount_func(acct_name)
+    for amount in AMOUNTS:
+        assert actual(amount) == amount
+
+@pytest.mark.parametrize('acct_name', [
+    'Equity:Funds:Restricted',
+    'Equity:Realized:CurrencyConversion',
+    'Income:Donations',
+    'Income:Other',
+    'Liabilities:CreditCard',
+    'Liabilities:Payable:Accounts',
+])
+def test_normalize_amount_func_neg(acct_name):
+    actual = core.normalize_amount_func(acct_name)
+    for amount in AMOUNTS:
+        assert actual(amount) == -amount
+
+@pytest.mark.parametrize('acct_name', [
+    '',
+    'Assets',
+    'Equity',
+    'Expenses',
+    'Income',
+    'Liabilities',
+])
+def test_normalize_amount_func_bad_acct_name(acct_name):
+    with pytest.raises(ValueError):
+        core.normalize_amount_func(acct_name)