diff --git a/test/monger/test/stress.clj b/test/monger/test/stress.clj
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+++ b/test/monger/test/stress.clj
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+(ns monger.test.stress
+  (:import [com.mongodb Mongo DB DBCollection WriteResult DBObject WriteConcern DBCursor]
+           [java.util Date])
+  (:require [monger core])
+  (:use     [clojure.test]))
+
+
+;;
+;; Fixture functions
+;;
+
+(defn purge-collection
+  [collection-name, f]
+  (monger.collection/remove collection-name)
+  (f)
+  (monger.collection/remove collection-name))
+
+(defn purge-things-collection
+  [f]
+  (purge-collection "things" f))
+
+(use-fixtures :each purge-things-collection)
+
+
+
+;;
+;; Tests
+;;
+
+(deftest insert-large-batches-of-documents-without-object-ids
+  (doseq [n [1000 10000 100000 1000000]]
+    (let [collection "things"
+          docs       (map (fn [i]
+                            (monger.conversion/to-db-object { :title "Untitled" :created-at (Date.) :number i }))
+                          (take n (iterate inc 1)))]
+      (monger.collection/remove collection)
+      (println "Inserting " n " documents...")
+      (time (monger.collection/insert-batch collection docs))
+      (is (= n (monger.collection/count collection))))))