diff --git a/test/QuerySpec.hs b/test/QuerySpec.hs
index 1e55a2f..1bd3cc8 100644
--- a/test/QuerySpec.hs
+++ b/test/QuerySpec.hs
@@ -1,15 +1,154 @@
-{-# LANGUAGE OverloadedStrings #-}
+{-# LANGUAGE OverloadedStrings, ExtendedDefaultRules, ScopedTypeVariables #-}
+{-# OPTIONS_GHC -fno-warn-type-defaults #-}
+
 module QuerySpec (spec) where
 import TestImport
+import Control.Exception
 
-fakeDB :: MonadIO m => Action m a -> m a
-fakeDB = access (error "Pipe") (error "AccessMode") "fake"
+testDBName :: Database
+testDBName = "mongodb-haskell-test"
+
+fakeDB :: Action IO a -> IO a
+fakeDB action = do
+    pipe <- connect (host "127.0.0.1")
+    result <- access pipe master testDBName action
+    close pipe
+    return result
+
+withCleanDatabase :: IO a -> IO ()
+withCleanDatabase action = dropDB >> action >> dropDB >> return ()
+  where
+    dropDB = fakeDB $ dropDatabase testDBName
 
 spec :: Spec
-spec =
-  describe "useDb" $
+spec = around withCleanDatabase $ do
+  describe "useDb" $ do
     it "changes the db" $ do
       db1 <- fakeDB thisDatabase
-      db1 `shouldBe` "fake"
-      db2 <- fakeDB $ useDb "use" thisDatabase
-      db2 `shouldBe` "use"
+      db1 `shouldBe` testDBName
+      db2 <- fakeDB $ useDb "another-mongodb-haskell-test" thisDatabase
+      db2 `shouldBe` "another-mongodb-haskell-test"
+
+  describe "insert" $ do
+    it "inserts a document to the collection and returns its _id" $ do
+      _id <- fakeDB $ insert "team" ["name" =: "Yankees", "league" =: "American"]
+      result <- fakeDB $ rest =<< find (select [] "team")
+      result `shouldBe` [["_id" =: _id, "name" =: "Yankees", "league" =: "American"]]
+
+  describe "insert_" $ do
+    it "inserts a document to the collection and doesn't return _id" $ do
+      _id <- fakeDB $ insert_ "team" ["name" =: "Yankees", "league" =: "American"]
+      fakeDB (count $ select ["name" =: "Yankees", "league" =: "American"] "team") `shouldReturn` 1
+      _id `shouldBe` ()
+
+  describe "insertMany" $ do
+    it "inserts documents to the collection and returns their _ids" $ do
+      (_id1:_id2:_) <- fakeDB $ insertMany "team" [ ["name" =: "Yankees", "league" =: "American"]
+                                                  , ["name" =: "Dodgers", "league" =: "American"]
+                                                  ]
+      result <- fakeDB $ rest =<< find (select [] "team")
+      result `shouldBe` [ ["_id" =: _id1, "name" =: "Yankees", "league" =: "American"]
+                        , ["_id" =: _id2, "name" =: "Dodgers", "league" =: "American"]
+                        ]
+    context "Insert a document with duplicating key" $ do
+      let insertDuplicatingDocument = do
+            _id <- fakeDB $ insert "team" ["name" =: "Dodgers", "league" =: "American"]
+            _ <- fakeDB $ insertMany "team" [ ["name" =: "Yankees", "league" =: "American"]
+                                            -- Try to insert document with
+                                            -- duplicate key
+                                            , ["name" =: "Dodgers", "league" =: "American", "_id" =: _id]
+                                            , ["name" =: "Indians", "league" =: "American"]
+                                            ]
+            return ()
+
+      before (insertDuplicatingDocument `catch` \(_ :: Failure) -> return ()) $ do
+        it "inserts documents before it" $
+          fakeDB ( count $ select ["name" =: "Yankees", "league" =: "American"] "team") `shouldReturn` 1
+
+        it "doesn't insert documents after it" $
+          fakeDB ( count $ select ["name" =: "Indians", "league" =: "American"] "team") `shouldReturn` 0
+
+      it "raises exception" $
+        insertDuplicatingDocument `shouldThrow` anyException
+      -- TODO No way to call getLastError?
+
+  describe "insertMany_" $ do
+    it "inserts documents to the collection and returns nothing" $ do
+      ids <- fakeDB $ insertMany_ "team" [ ["name" =: "Yankees", "league" =: "American"]
+                                         , ["name" =: "Dodgers", "league" =: "American"]
+                                         ]
+      ids `shouldBe` ()
+
+    context "Insert a document with duplicating key" $ do
+      let insertDuplicatingDocument = do
+            _id <- fakeDB $ insert "team" ["name" =: "Dodgers", "league" =: "American"]
+            _ <- fakeDB $ insertMany_ "team" [ ["name" =: "Yankees", "league" =: "American"]
+                                             -- Try to insert document with
+                                             -- duplicate key
+                                             , ["name" =: "Dodgers", "league" =: "American", "_id" =: _id]
+                                             , ["name" =: "Indians", "league" =: "American"]
+                                             ]
+            return ()
+
+      before (insertDuplicatingDocument `catch` \(_ :: Failure) -> return ()) $ do
+        it "inserts documents before it" $
+          fakeDB (count $ select ["name" =: "Yankees", "league" =: "American"] "team") `shouldReturn` 1
+        it "doesn't insert documents after it" $
+          fakeDB (count $ select ["name" =: "Indians", "league" =: "American"] "team") `shouldReturn` 0
+      it "raises exception" $
+        insertDuplicatingDocument `shouldThrow` anyException
+
+  describe "insertAll" $ do
+    it "inserts documents to the collection and returns their _ids" $ do
+      (_id1:_id2:_) <- fakeDB $ insertAll "team" [ ["name" =: "Yankees", "league" =: "American"]
+                                                 , ["name" =: "Dodgers", "league" =: "American"]
+                                                 ]
+      result <- fakeDB $ rest =<< find (select [] "team")
+      result `shouldBe` [["_id" =: _id1, "name" =: "Yankees", "league" =: "American"]
+                        ,["_id" =: _id2, "name" =: "Dodgers", "league" =: "American"]
+                        ]
+
+    context "Insert a document with duplicating key" $ do
+      let insertDuplicatingDocument = do
+            _id <- fakeDB $ insert "team" ["name" =: "Dodgers", "league" =: "American"]
+            _ <- fakeDB $ insertAll "team" [ ["name" =: "Yankees", "league" =: "American"]
+                                            -- Try to insert document with
+                                            -- duplicate key
+                                            , ["name" =: "Dodgers", "league" =: "American", "_id" =: _id]
+                                            , ["name" =: "Indians", "league" =: "American"]
+                                            ]
+            return ()
+
+      before (insertDuplicatingDocument `catch` \(_ :: Failure) -> return ()) $ do
+        it "inserts all documents which can be inserted" $ do
+          fakeDB (count $ select ["name" =: "Yankees", "league" =: "American"] "team") `shouldReturn` 1
+          fakeDB (count $ select ["name" =: "Indians", "league" =: "American"] "team") `shouldReturn` 1
+
+      it "raises exception" $
+        insertDuplicatingDocument `shouldThrow` anyException
+
+  describe "insertAll_" $ do
+    it "inserts documents to the collection and returns their _ids" $ do
+      ids <- fakeDB $ insertAll_ "team" [ ["name" =: "Yankees", "league" =: "American"]
+                                        , ["name" =: "Dodgers", "league" =: "American"]
+                                        ]
+      ids `shouldBe` ()
+
+    context "Insert a document with duplicating key" $ do
+      let insertDuplicatingDocument = do
+            _id <- fakeDB $ insert "team" ["name" =: "Dodgers", "league" =: "American"]
+            _ <- fakeDB $ insertAll_ "team" [ ["name" =: "Yankees", "league" =: "American"]
+                                             -- Try to insert document with
+                                             -- duplicate key
+                                             , ["name" =: "Dodgers", "league" =: "American", "_id" =: _id]
+                                             , ["name" =: "Indians", "league" =: "American"]
+                                             ]
+            return ()
+
+      before (insertDuplicatingDocument `catch` \(_ :: Failure) -> return ()) $ do
+        it "inserts all documents which can be inserted" $ do
+          fakeDB (count $ select ["name" =: "Yankees", "league" =: "American"] "team") `shouldReturn` 1
+          fakeDB (count $ select ["name" =: "Indians", "league" =: "American"] "team") `shouldReturn` 1
+
+      it "raises exception" $
+        insertDuplicatingDocument `shouldThrow` anyException