diff --git a/repos/gems/run/cbe_tester.run b/repos/gems/run/cbe_tester.run
index 86674e0bf2..ef5b149e29 100644
--- a/repos/gems/run/cbe_tester.run
+++ b/repos/gems/run/cbe_tester.run
@@ -1,5 +1,6 @@
 
 assert_spec linux
+assert_spec x86_64
 
 exec rm -rf var/libcache/cbe
 exec rm -rf var/libcache/cbe_cxx