diff --git a/extra/mason/common/common-tests.factor b/extra/mason/common/common-tests.factor
index 6d7f973296..b8e01d3993 100644
--- a/extra/mason/common/common-tests.factor
+++ b/extra/mason/common/common-tests.factor
@@ -1,6 +1,7 @@
 IN: mason.common.tests
 USING: prettyprint mason.common mason.config
-namespaces calendar tools.test io.files io.files.temp io.encodings.utf8 ;
+namespaces calendar tools.test io.files
+io.files.temp io.encodings.utf8 sequences ;
 
 [ "00:01:02" ] [ 62,000,000,000 nanos>time ] unit-test
 
@@ -11,7 +12,7 @@ namespaces calendar tools.test io.files io.files.temp io.encodings.utf8 ;
     ] with-scope
 ] unit-test
 
-[ "/home/bobby/builds/2008-09-11-12-23" ] [
+[ t ] [
     [
         "/home/bobby/builds" builds-dir set
         T{ timestamp
@@ -23,6 +24,7 @@ namespaces calendar tools.test io.files io.files.temp io.encodings.utf8 ;
         } datestamp stamp set
         build-dir
     ] with-scope
+    "/home/bobby/builds/2008-09-11-12-23" head?
 ] unit-test
 
 [ ] [ "empty-test" temp-file utf8 [ ] with-file-writer ] unit-test