diff --git a/billy/tests/importers/test_filters.py b/billy/tests/importers/test_filters.py
index <HASH>..<HASH> 100644
--- a/billy/tests/importers/test_filters.py
+++ b/billy/tests/importers/test_filters.py
@@ -13,3 +13,13 @@ def test_phone_filter():
     ]
     for num in numbers:
         assert phone_filter(num) == number
+
+
+def test_phone_filter_country():
+    number = "1-555-606-0842"
+    numbers = [
+        "+1-(555)-606-0842",
+        "+1 (555) 606-0842"
+    ]
+    for num in numbers:
+        assert phone_filter(num) == number
Adding in a country code checker