diff --git a/extra/project-euler/186/186-tests.factor b/extra/project-euler/186/186-tests.factor
index 71d2f1c59b..9f4ad5914f 100644
--- a/extra/project-euler/186/186-tests.factor
+++ b/extra/project-euler/186/186-tests.factor
@@ -1,4 +1,5 @@
 USING: project-euler.186 tools.test ;
 IN: project-euler.186.tests
 
-[ 2325629 ] [ euler186 ] unit-test
+! Uses too much memory; don't want to run on build machines
+! [ 2325629 ] [ euler186 ] unit-test