diff --git a/koans/about_symbols.rb b/koans/about_symbols.rb
index 2aad194..e78c65a 100644
--- a/koans/about_symbols.rb
+++ b/koans/about_symbols.rb
@@ -70,7 +70,7 @@ class AboutSymbols < EdgeCase::Koan
   # interesting string operations are available on symbols.
   def test_symbols_cannot_be_concatenated
     # Exceptions will be pondered further father down the path
-    assert_raise(__) do
+    assert_raise(___) do
       :cats + :dogs
     end
   end
diff --git a/src/about_symbols.rb b/src/about_symbols.rb
index cf1b8b0..17dfa81 100644
--- a/src/about_symbols.rb
+++ b/src/about_symbols.rb
@@ -70,7 +70,7 @@ class AboutSymbols < EdgeCase::Koan
   # interesting string operations are available on symbols.
   def test_symbols_cannot_be_concatenated
     # Exceptions will be pondered further father down the path
-    assert_raise(__(NoMethodError)) do
+    assert_raise(___(NoMethodError)) do
       :cats + :dogs
     end
   end