diff --git a/yesod/hsfiles/mongo.hsfiles b/yesod/hsfiles/mongo.hsfiles
index e83746d7..47c8892a 100644
--- a/yesod/hsfiles/mongo.hsfiles
+++ b/yesod/hsfiles/mongo.hsfiles
@@ -425,6 +425,7 @@ test-suite test
                  , yesod-core
                  , persistent
                  , persistent-mongoDB
+                 , resourcet
 
 {-# START_FILE Settings.hs #-}
 -- | Settings are centralized, as much as possible, into this file. This
@@ -5728,10 +5729,12 @@ module HomeTest
     ) where
 
 import TestImport
+import qualified Data.List as L
 
 homeSpecs :: Specs
 homeSpecs =
-  describe "These are some example tests" $
+  describe "These are some example tests" $ do
+
     it "loads the index and checks it looks right" $ do
       get_ "/"
       statusIs 200
@@ -5747,21 +5750,38 @@ homeSpecs =
       htmlAllContain ".message" "Some Content"
       htmlAllContain ".message" "text/plain"
 
+    -- This is a simple example of using a database access in a test.  The
+    -- test will succeed for a fresh scaffolded site with an empty database,
+    -- but will fail on an existing database with a non-empty user table.
+    it "leaves the user table empty" $ do
+      get_ "/"
+      statusIs 200
+      users <- runDB $ selectList ([] :: [Filter User]) []
+      assertEqual "user table empty" 0 $ L.length users
+
 {-# START_FILE tests/TestImport.hs #-}
 {-# LANGUAGE OverloadedStrings #-}
 module TestImport
     ( module Yesod.Test
+    , module Model
+    , module Database.Persist
     , runDB
     , Specs
     ) where
 
 import Yesod.Test
+import Database.Persist hiding (get)
 import Database.Persist.MongoDB hiding (master)
+import Control.Monad.Trans.Resource (ResourceT, runResourceT)
+
+import Model
 
 type Specs = SpecsConn Connection
 
-runDB :: Action IO a -> OneSpec Connection a
-runDB = runDBRunner runMongoDBPoolDef
+runDB :: Action (ResourceT IO) a -> OneSpec Connection a
+runDB = runDBRunner poolRunner
+  where
+    poolRunner query pool = runResourceT $ runMongoDBPoolDef query pool
 
 {-# START_FILE tests/main.hs #-}
 {-# LANGUAGE OverloadedStrings #-}
diff --git a/yesod/hsfiles/mysql.hsfiles b/yesod/hsfiles/mysql.hsfiles
index d911bdf7..99c83252 100644
--- a/yesod/hsfiles/mysql.hsfiles
+++ b/yesod/hsfiles/mysql.hsfiles
@@ -423,6 +423,7 @@ test-suite test
                  , yesod-core
                  , persistent
                  , persistent-mysql
+                 , resourcet
 
 {-# START_FILE Settings.hs #-}
 -- | Settings are centralized, as much as possible, into this file. This
@@ -5752,10 +5753,12 @@ module HomeTest
     ) where
 
 import TestImport
+import qualified Data.List as L
 
 homeSpecs :: Specs
 homeSpecs =
-  describe "These are some example tests" $
+  describe "These are some example tests" $ do
+
     it "loads the index and checks it looks right" $ do
       get_ "/"
       statusIs 200
@@ -5771,21 +5774,38 @@ homeSpecs =
       htmlAllContain ".message" "Some Content"
       htmlAllContain ".message" "text/plain"
 
+    -- This is a simple example of using a database access in a test.  The
+    -- test will succeed for a fresh scaffolded site with an empty database,
+    -- but will fail on an existing database with a non-empty user table.
+    it "leaves the user table empty" $ do
+      get_ "/"
+      statusIs 200
+      users <- runDB $ selectList ([] :: [Filter User]) []
+      assertEqual "user table empty" 0 $ L.length users
+
 {-# START_FILE tests/TestImport.hs #-}
 {-# LANGUAGE OverloadedStrings #-}
 module TestImport
     ( module Yesod.Test
+    , module Model
+    , module Database.Persist
     , runDB
     , Specs
     ) where
 
 import Yesod.Test
-import Database.Persist.GenericSql
+import Database.Persist hiding (get)
+import Database.Persist.GenericSql (runSqlPool, SqlPersist, Connection)
+import Control.Monad.Trans.Resource (ResourceT, runResourceT)
+
+import Model
 
 type Specs = SpecsConn Connection
 
-runDB :: SqlPersist IO a -> OneSpec Connection a
-runDB = runDBRunner runSqlPool
+runDB :: SqlPersist (ResourceT IO) a -> OneSpec Connection a
+runDB = runDBRunner poolRunner
+  where
+    poolRunner query pool = runResourceT $ runSqlPool query pool
 
 {-# START_FILE tests/main.hs #-}
 {-# LANGUAGE OverloadedStrings #-}
diff --git a/yesod/hsfiles/postgres.hsfiles b/yesod/hsfiles/postgres.hsfiles
index 508b4861..1d176f23 100644
--- a/yesod/hsfiles/postgres.hsfiles
+++ b/yesod/hsfiles/postgres.hsfiles
@@ -423,6 +423,7 @@ test-suite test
                  , yesod-core
                  , persistent
                  , persistent-postgresql
+                 , resourcet
 
 {-# START_FILE Settings.hs #-}
 -- | Settings are centralized, as much as possible, into this file. This
@@ -5726,10 +5727,12 @@ module HomeTest
     ) where
 
 import TestImport
+import qualified Data.List as L
 
 homeSpecs :: Specs
 homeSpecs =
-  describe "These are some example tests" $
+  describe "These are some example tests" $ do
+
     it "loads the index and checks it looks right" $ do
       get_ "/"
       statusIs 200
@@ -5745,21 +5748,38 @@ homeSpecs =
       htmlAllContain ".message" "Some Content"
       htmlAllContain ".message" "text/plain"
 
+    -- This is a simple example of using a database access in a test.  The
+    -- test will succeed for a fresh scaffolded site with an empty database,
+    -- but will fail on an existing database with a non-empty user table.
+    it "leaves the user table empty" $ do
+      get_ "/"
+      statusIs 200
+      users <- runDB $ selectList ([] :: [Filter User]) []
+      assertEqual "user table empty" 0 $ L.length users
+
 {-# START_FILE tests/TestImport.hs #-}
 {-# LANGUAGE OverloadedStrings #-}
 module TestImport
     ( module Yesod.Test
+    , module Model
+    , module Database.Persist
     , runDB
     , Specs
     ) where
 
 import Yesod.Test
-import Database.Persist.GenericSql
+import Database.Persist hiding (get)
+import Database.Persist.GenericSql (runSqlPool, SqlPersist, Connection)
+import Control.Monad.Trans.Resource (ResourceT, runResourceT)
+
+import Model
 
 type Specs = SpecsConn Connection
 
-runDB :: SqlPersist IO a -> OneSpec Connection a
-runDB = runDBRunner runSqlPool
+runDB :: SqlPersist (ResourceT IO) a -> OneSpec Connection a
+runDB = runDBRunner poolRunner
+  where
+    poolRunner query pool = runResourceT $ runSqlPool query pool
 
 {-# START_FILE tests/main.hs #-}
 {-# LANGUAGE OverloadedStrings #-}
diff --git a/yesod/hsfiles/sqlite.hsfiles b/yesod/hsfiles/sqlite.hsfiles
index eaadf0c9..dbb49b34 100644
--- a/yesod/hsfiles/sqlite.hsfiles
+++ b/yesod/hsfiles/sqlite.hsfiles
@@ -423,6 +423,7 @@ test-suite test
                  , yesod-core
                  , persistent
                  , persistent-sqlite
+                 , resourcet
 
 {-# START_FILE Settings.hs #-}
 -- | Settings are centralized, as much as possible, into this file. This
@@ -5722,10 +5723,12 @@ module HomeTest
     ) where
 
 import TestImport
+import qualified Data.List as L
 
 homeSpecs :: Specs
 homeSpecs =
-  describe "These are some example tests" $
+  describe "These are some example tests" $ do
+
     it "loads the index and checks it looks right" $ do
       get_ "/"
       statusIs 200
@@ -5741,21 +5744,38 @@ homeSpecs =
       htmlAllContain ".message" "Some Content"
       htmlAllContain ".message" "text/plain"
 
+    -- This is a simple example of using a database access in a test.  The
+    -- test will succeed for a fresh scaffolded site with an empty database,
+    -- but will fail on an existing database with a non-empty user table.
+    it "leaves the user table empty" $ do
+      get_ "/"
+      statusIs 200
+      users <- runDB $ selectList ([] :: [Filter User]) []
+      assertEqual "user table empty" 0 $ L.length users
+
 {-# START_FILE tests/TestImport.hs #-}
 {-# LANGUAGE OverloadedStrings #-}
 module TestImport
     ( module Yesod.Test
+    , module Model
+    , module Database.Persist
     , runDB
     , Specs
     ) where
 
 import Yesod.Test
-import Database.Persist.GenericSql
+import Database.Persist hiding (get)
+import Database.Persist.GenericSql (runSqlPool, SqlPersist, Connection)
+import Control.Monad.Trans.Resource (ResourceT, runResourceT)
+
+import Model
 
 type Specs = SpecsConn Connection
 
-runDB :: SqlPersist IO a -> OneSpec Connection a
-runDB = runDBRunner runSqlPool
+runDB :: SqlPersist (ResourceT IO) a -> OneSpec Connection a
+runDB = runDBRunner poolRunner
+  where
+    poolRunner query pool = runResourceT $ runSqlPool query pool
 
 {-# START_FILE tests/main.hs #-}
 {-# LANGUAGE OverloadedStrings #-}