diff --git a/extra/python/python-tests.factor b/extra/python/python-tests.factor
index b757dbb790..7bf73f413e 100644
--- a/extra/python/python-tests.factor
+++ b/extra/python/python-tests.factor
@@ -113,7 +113,9 @@ SYMBOLS: year month day ;
 ] py-test
 
 ! Modules
-[ t ] [ "os" import PyModule_GetDict py-dict-size 200 > ] py-test
+[ t ] [
+    "os" import PyModule_GetDict dup Py_IncRef &Py_DecRef py-dict-size 100 >
+] py-test
 
 ! Reference counting tests
 [ 2 ] [ 3 <py-tuple> getrefcount >factor ] py-test