diff --git a/collects/tests/macro-debugger/tests/collects.ss b/collects/tests/macro-debugger/tests/collects.ss
index ded1b6a..b28cd70 100644
--- a/collects/tests/macro-debugger/tests/collects.ss
+++ b/collects/tests/macro-debugger/tests/collects.ss
@@ -195,7 +195,7 @@
     scheme/mzscheme
     scheme/nest
     scheme/private/class-internal
-    scheme/private/contract
+    scheme/private/contract-base
     scheme/private/contract-arrow
     scheme/private/contract-basic-opters
     scheme/private/contract-ds