diff --git a/test_puzzle83.py b/test_puzzle83.py
index 57f7009..6dfa193 100644
--- a/test_puzzle83.py
+++ b/test_puzzle83.py
@@ -12,18 +12,18 @@
     8: frozenset([7, 9]),
     9: frozenset([7, 8, 10]),
     10: frozenset([9, 11, 12]),
-    11: frozenset([10, 12, 13, 52]),
+    11: frozenset([10, 12, 13, 15, 52]),
     12: frozenset([10, 11, 19, 33]),
     13: frozenset([11, 14, 15]),
     14: frozenset([13, 15]),
-    15: frozenset([13, 14, 16]),
+    15: frozenset([11, 13, 14, 16]),
     16: frozenset([15, 17, 18]),
     17: frozenset([16, 18]),
-    18: frozenset([16, 17]),
+    18: frozenset([16, 17, 22]),
     19: frozenset([12, 20, 21]),
     20: frozenset([19, 21]),
     21: frozenset([19, 20, 22]),
-    22: frozenset([21, 23, 24]),
+    22: frozenset([18, 21, 23, 24]),
     23: frozenset([22, 24]),
     24: frozenset([22, 23]),
     25: frozenset([3, 26, 27]),