1 files changed, 12 insertions, 0 deletions
diff --git a/jstests/core/query/basic8.js b/jstests/core/query/basic8.js
new file mode 100644
index 00000000000..4a35de6963b
--- /dev/null
+++ b/jstests/core/query/basic8.js
@@ -0,0 +1,12 @@
+// @tags: [requires_fastcount]
+
+t = db.basic8;
+t.drop();
+
+t.save({a: 1});
+o = t.findOne();
+o.b = 2;
+t.save(o);
+
+assert.eq(1, t.find().count(), "A");
+assert.eq(2, t.findOne().b, "B");