diff --git a/extra/bson/bson-tests.factor b/extra/bson/bson-tests.factor
index f068e951ae..7353a9a831 100644
--- a/extra/bson/bson-tests.factor
+++ b/extra/bson/bson-tests.factor
@@ -4,7 +4,7 @@ io.streams.byte-array tools.test literals calendar kernel math ;
 IN: bson.tests
 
 : turnaround ( value -- value )
-    assoc>bv >byte-array binary [ H{ } stream>assoc ] with-byte-reader ;
+    assoc>bv >byte-array binary [ H{ } clone stream>assoc ] with-byte-reader ;
 
 [ H{ { "a" "a string" } } ] [ H{ { "a" "a string" } } turnaround ] unit-test