diff --git a/ChangeLog.md b/ChangeLog.md
--- a/ChangeLog.md
+++ b/ChangeLog.md
@@ -1,3 +1,8 @@
+## 1.5.1.1
+
+* Minor documentation improvement
+* Reduce external-library dependencies for tests
+
 ## 1.5.1
 
 * Include CSRF token in default form
diff --git a/Yesod/Auth/HashDB.hs b/Yesod/Auth/HashDB.hs
--- a/Yesod/Auth/HashDB.hs
+++ b/Yesod/Auth/HashDB.hs
@@ -101,6 +101,10 @@
 -- >     <input type="password" name="password">
 -- >     <input type="submit" value="Login">
 --
+-- If a CSRF token needs to be embedded in a custom form, code must be
+-- included in the widget to add it - see @defaultForm@ in the source
+-- code of this module for an example.
+--
 -------------------------------------------------------------------------------
 module Yesod.Auth.HashDB
     ( HashDBUser(..)
diff --git a/stack.yaml b/stack.yaml
new file mode 100644
--- /dev/null
+++ b/stack.yaml
@@ -0,0 +1,4 @@
+resolver: lts-5.4
+packages: 
+- .
+extra-deps: []
diff --git a/test/IntegrationTest.hs b/test/IntegrationTest.hs
--- a/test/IntegrationTest.hs
+++ b/test/IntegrationTest.hs
@@ -7,7 +7,7 @@
     integrationSpec
 ) where
 
-import ClassyPrelude
+import BasicPrelude
 import Test.Hspec                   (Spec, SpecWith, before,
                                      describe, context, it)
 import qualified Yesod.Test as YT
diff --git a/test/TestTools.hs b/test/TestTools.hs
--- a/test/TestTools.hs
+++ b/test/TestTools.hs
@@ -13,7 +13,9 @@
 ) where
 
 import TestSite           (App(..))
-import ClassyPrelude
+import BasicPrelude
+import Data.Text          (pack, unpack)
+import Data.ByteString.Lazy (toStrict)
 import Yesod.Core         (RedirectUrl)
 import Yesod.Test
 import qualified Data.ByteString.Char8 as BC
@@ -79,8 +81,8 @@
     withResponse ( \ SResponse { simpleStatus = s, simpleHeaders = h } -> do
                         let code = statusCode s
                         assertEqual ("Expected a 302 or 303 redirection status "
-                                     ++ "but received " ++ show code)
-                                    (code `oelem` [302,303])
+                                     ++ "but received " ++ unpack (show code))
+                                    (code `elem` [302,303])
                                     True
                         return $ lookup "Location" h
                  )
diff --git a/yesod-auth-hashdb.cabal b/yesod-auth-hashdb.cabal
--- a/yesod-auth-hashdb.cabal
+++ b/yesod-auth-hashdb.cabal
@@ -1,5 +1,5 @@
 name:            yesod-auth-hashdb
-version:         1.5.1
+version:         1.5.1.1
 license:         MIT
 license-file:    LICENSE
 author:          Patrick Brisbin, later changes Paul Rouse
@@ -27,6 +27,7 @@
     package.  (Note that other authentication plugins may be more appropriate
     if you wish to use email verification to set up accounts).
 extra-source-files:  ChangeLog.md
+                     stack.yaml
 
 library
     build-depends:   base                    >= 4          && < 5
@@ -65,7 +66,7 @@
                    , TestTools
     build-depends:   base >= 4 && < 5
                    , bytestring
-                   , classy-prelude
+                   , basic-prelude
                    , containers
                    , hspec                   >= 2.0.0
                    , http-conduit