diff --git a/extra/builder/test/test.factor b/extra/builder/test/test.factor
index dfe64b38d9..6f87213096 100644
--- a/extra/builder/test/test.factor
+++ b/extra/builder/test/test.factor
@@ -1,7 +1,9 @@
 
-USING: kernel sequences assocs builder continuations vocabs vocabs.loader
+USING: kernel namespaces sequences assocs builder continuations
+       vocabs vocabs.loader
        io
        io.files
+       prettyprint
        tools.browser
        tools.test
        bootstrap.stage2 ;