diff --git a/.gitignore b/.gitignore
index 83319f6..57ffc6e 100644
--- a/.gitignore
+++ b/.gitignore
@@ -8,3 +8,4 @@ env3
 MANIFEST
 zss.egg-info
 .tox
+.pytest_cache
diff --git a/zss/tests/test_regress.py b/zss/tests/test_regress.py
index 4f624dd..038e03c 100644
--- a/zss/tests/test_regress.py
+++ b/zss/tests/test_regress.py
@@ -154,3 +154,13 @@ def update(a,b):
     )
     assert dist == 814
 
+def test_wrong_removal():
+    A = (
+        Node('a')
+          .addkid(Node('b'))
+          .addkid(Node('c'))
+    )
+    B = Node("a")
+    dist = simple_distance(A, B)
+    assert dist == 2
+