diff --git a/tests/test_meta_tax_implication.py b/tests/test_meta_tax_implication.py
index 94aa70a91a8dfbb8bc4f24d198c7a2189e02d716..522b71ac56d32d2bbda3911dab5806d5ff668dc6 100644
--- a/tests/test_meta_tax_implication.py
+++ b/tests/test_meta_tax_implication.py
@@ -56,7 +56,7 @@ def test_valid_values_on_postings(src_value, set_value):
         ('Assets:Cash', -25, {TEST_KEY: src_value}),
     ])
     checker = meta_tax_implication.MetaTaxImplication()
-    errors = checker.run(txn, txn.postings[-1], -1)
+    errors = list(checker.run(txn))
     assert not errors
     assert txn.postings[-1].meta.get(TEST_KEY) == set_value
 
@@ -67,7 +67,7 @@ def test_invalid_values_on_postings(src_value):
         ('Assets:Cash', -25, {TEST_KEY: src_value}),
     ])
     checker = meta_tax_implication.MetaTaxImplication()
-    errors = checker.run(txn, txn.postings[-1], -1)
+    errors = list(checker.run(txn))
     assert errors
 
 @pytest.mark.parametrize('src_value,set_value', VALID_VALUES.items())
@@ -77,7 +77,7 @@ def test_valid_values_on_transactions(src_value, set_value):
         ('Assets:Cash', -25),
     ])
     checker = meta_tax_implication.MetaTaxImplication()
-    errors = checker.run(txn, txn.postings[-1], -1)
+    errors = list(checker.run(txn))
     assert not errors
     assert txn.postings[-1].meta.get(TEST_KEY) == set_value
 
@@ -88,7 +88,7 @@ def test_invalid_values_on_transactions(src_value):
         ('Assets:Cash', -25),
     ])
     checker = meta_tax_implication.MetaTaxImplication()
-    errors = checker.run(txn, txn.postings[-1], -1)
+    errors = list(checker.run(txn))
     assert errors
 
 @pytest.mark.parametrize('account', [
@@ -102,7 +102,7 @@ def test_non_asset_accounts_skipped(account):
         ('Assets:Cash', -25, {TEST_KEY: 'USA-Corporation'}),
     ])
     checker = meta_tax_implication.MetaTaxImplication()
-    errors = checker.run(txn, txn.postings[0], 0)
+    errors = list(checker.run(txn))
     assert not errors
 
 def test_asset_credits_skipped():
@@ -111,7 +111,7 @@ def test_asset_credits_skipped():
         ('Assets:Cash', 25),
     ])
     checker = meta_tax_implication.MetaTaxImplication()
-    errors = checker.run(txn, txn.postings[-1], -1)
+    errors = list(checker.run(txn))
     assert not errors
     assert not txn.postings[-1].meta
 
@@ -128,5 +128,5 @@ def test_default_value_set_in_date_range(date, need_value):
         ('Assets:Cash', -25),
     ])
     checker = meta_tax_implication.MetaTaxImplication()
-    errors = checker.run(txn, txn.postings[-1], -1)
+    errors = list(checker.run(txn))
     assert bool(errors) == bool(need_value)