diff --git a/exercises/alphametics/alphametics_test.py b/exercises/alphametics/alphametics_test.py
index c8afec3456..be4899c5bc 100644
--- a/exercises/alphametics/alphametics_test.py
+++ b/exercises/alphametics/alphametics_test.py
@@ -66,6 +66,7 @@ def test_puzzle_with_ten_letters(self):
              "S": 6,
              "T": 9})
 
+    @unittest.skip("extra-credit")
     def test_puzzle_with_ten_letters_and_199_addends(self):
         self.assertEqual(
             solve(
diff --git a/test/check-exercises.py b/test/check-exercises.py
index b194ca3bde..ce8de45716 100755
--- a/test/check-exercises.py
+++ b/test/check-exercises.py
@@ -10,7 +10,7 @@
 import json
 
 # Allow high-performance tests to be skipped
-ALLOW_SKIP = ['largest-series-product']
+ALLOW_SKIP = ['alphametics', 'largest-series-product']
 
 
 def python_executable_name():