diff --git a/tests/test_reconcile.py b/tests/test_reconcile.py
index 5f75d3aae4c6a48df2a62ddfdb56b4e5ecef5eb8..ea9fe8e6bd0e9dbe996883a016b13fec886d392f 100644
--- a/tests/test_reconcile.py
+++ b/tests/test_reconcile.py
@@ -1,24 +1,32 @@
 import datetime
 import decimal
 
-from conservancy_beancount.reconcile.prototype_amex_reconciler import match_statement_and_books2 as match_statement_and_books, remove_payee_junk, date_proximity
+from conservancy_beancount.reconcile.prototype_amex_reconciler import (
+    match_statement_and_books,
+    remove_payee_junk,
+    date_proximity,
+    remove_duplicate_words,
+)
 
 S1 = {
     'date': datetime.date(2022, 1, 1),
     'amount': decimal.Decimal('10.00'),
     'payee': 'Patreon         / Patreon   / 123456/ ST-A1B2C3D4G5H6       /',
+    'check_id': '',
     'line': 222,
 }
 S2 = {
     'date': datetime.date(2022, 1, 2),
     'amount': decimal.Decimal('20.00'),
     'payee': 'BT*LINODE           PHILADELPHIA        P',
+    'check_id': '',
     'line': 333,
 }
 S3 = {
     'date': datetime.date(2022, 1, 3),
     'amount': decimal.Decimal('30.00'),
     'payee': 'USPS PO 4067540039 0PORTLAND            OR',
+    'check_id': '',
     'line': 444,
 }
 
@@ -26,8 +34,7 @@ B1 = {
     'date': datetime.date(2022, 1, 1),
     'amount': decimal.Decimal('10.00'),
     'payee': 'Patreon',
-    'entity': '',
-    'check_id': None,
+    'check_id': '',
     'filename': '2022/imports.beancount',
     'line': 777,
     'bank_statement': "Financial/Bank-Statements/AMEX/2022-01-12_AMEX_statement.pdf"
@@ -36,8 +43,7 @@ B2 = {
     'date': datetime.date(2022, 1, 2),
     'amount': decimal.Decimal('20.00'),
     'payee': 'Linode',
-    'entity': '',
-    'check_id': None,
+    'check_id': '',
     'filename': '2022/main.beancount',
     'line': 888,
     'bank_statement': "Financial/Bank-Statements/AMEX/2022-01-12_AMEX_statement.pdf"
@@ -46,8 +52,7 @@ B3_next_day = {
     'date': datetime.date(2022, 1, 4),
     'amount': decimal.Decimal('30.00'),
     'payee': 'USPS',
-    'entity': '',
-    'check_id': None,
+    'check_id': '',
     'filename': '2022/main.beancount',
     'line': 999,
     'bank_statement': "Financial/Bank-Statements/AMEX/2022-01-12_AMEX_statement.pdf"
@@ -56,8 +61,7 @@ B3_next_week = {
     'date': datetime.date(2022, 1, 10),
     'amount': decimal.Decimal('30.00'),
     'payee': 'USPS',
-    'entity': '',
-    'check_id': None,
+    'check_id': '',
     'filename': '2022/main.beancount',
     'line': 999,
     'bank_statement': "Financial/Bank-Statements/AMEX/2022-01-12_AMEX_statement.pdf"
@@ -66,8 +70,7 @@ B3_mismatch_amount = {
     'date': datetime.date(2022, 1, 3),
     'amount': decimal.Decimal('31.00'),
     'payee': 'USPS',
-    'entity': '',
-    'check_id': None,
+    'check_id': '',
     'filename': '2022/main.beancount',
     'line': 999,
     'bank_statement': "Financial/Bank-Statements/AMEX/2022-01-12_AMEX_statement.pdf"
@@ -76,8 +79,7 @@ B3_payee_mismatch_1 = {
     'date': datetime.date(2022, 1, 3),
     'amount': decimal.Decimal('30.00'),
     'payee': 'Credit X',
-    'entity': '',
-    'check_id': None,
+    'check_id': '',
     'filename': '2022/main.beancount',
     'line': 999,
     'bank_statement': "Financial/Bank-Statements/AMEX/2022-01-12_AMEX_statement.pdf"
@@ -86,8 +88,7 @@ B3_payee_mismatch_2 = {
     'date': datetime.date(2022, 1, 3),
     'amount': decimal.Decimal('30.00'),
     'payee': 'Credit Y',
-    'entity': '',
-    'check_id': None,
+    'check_id': '',
     'filename': '2022/main.beancount',
     'line': 999,
     'bank_statement': "Financial/Bank-Statements/AMEX/2022-01-12_AMEX_statement.pdf"
@@ -173,3 +174,7 @@ def test_date_proximity():
     assert date_proximity(datetime.date(2021, 8, 23), datetime.date(2021, 8, 23)) == 1.0
     assert date_proximity(datetime.date(2021, 8, 23), datetime.date(2021, 8, 23) - datetime.timedelta(days=30)) == 0.5
     assert date_proximity(datetime.date(2021, 8, 23), datetime.date(2021, 8, 23) - datetime.timedelta(days=60)) == 0.0
+
+
+def test_remove_duplicate_words():
+    assert remove_duplicate_words('Hi Foo Kow FOO') == 'Hi Foo Kow'