diff --git a/leiningen-core/test/leiningen/core/test/project.clj b/leiningen-core/test/leiningen/core/test/project.clj
index 27d21319..125662a1 100755
--- a/leiningen-core/test/leiningen/core/test/project.clj
+++ b/leiningen-core/test/leiningen/core/test/project.clj
@@ -13,7 +13,8 @@
               (fn [f]
                 ;; Can't have user-level profiles interfering!
                 (with-redefs [user/profiles (constantly {})
-                              user/credentials (constantly nil)]
+                              user/credentials (constantly nil)
+                              project/warn-once #'project/warn]
                   (f))))
 
 (defn make-project