diff --git a/ChangeLog.md b/ChangeLog.md
--- a/ChangeLog.md
+++ b/ChangeLog.md
@@ -1,3 +1,7 @@
+## 1.5.8
+* Added implicit parameter HasCallStack to assertions.
+[#1421](https://github.com/yesodweb/yesod/pull/1421)
+
 ## 1.5.7
 
 * Add clickOn.
diff --git a/Yesod/Test.hs b/Yesod/Test.hs
--- a/Yesod/Test.hs
+++ b/Yesod/Test.hs
@@ -4,6 +4,8 @@
 {-# LANGUAGE RecordWildCards #-}
 {-# LANGUAGE FlexibleInstances #-}
 {-# LANGUAGE TypeFamilies #-}
+{-# LANGUAGE ImplicitParams #-}
+{-# LANGUAGE ConstraintKinds #-}
 
 {-|
 Yesod.Test is a pragmatic framework for testing web applications built
@@ -150,7 +152,17 @@
 import Control.Applicative ((<$>))
 import Text.Show.Pretty (ppShow)
 import Data.Monoid (mempty)
+#if MIN_VERSION_base(4,9,0)
+import GHC.Stack (HasCallStack)
+#elif MIN_VERSION_base(4,8,1)
+import GHC.Stack (CallStack)
+type HasCallStack = (?callStack :: CallStack)
+#else
+import GHC.Exts (Constraint)
+type HasCallStack = (() :: Constraint)
+#endif
 
+
 -- | The state used in a single test case defined using 'yit'
 --
 -- Since 1.2.4
@@ -330,7 +342,7 @@
 -- In case they are not equal, error mesasge includes the two values.
 --
 -- @since 1.5.2
-assertEq :: (Eq a, Show a) => String -> a -> a -> YesodExample site ()
+assertEq :: (HasCallStack, Eq a, Show a) => String -> a -> a -> YesodExample site ()
 assertEq m a b =
   liftIO $ HUnit.assertBool msg (a == b)
   where msg = "Assertion: " ++ m ++ "\n" ++
@@ -342,24 +354,24 @@
 -- In case they are equal, error mesasge includes the values.
 --
 -- @since 1.5.6
-assertNotEq :: (Eq a, Show a) => String -> a -> a -> YesodExample site ()
+assertNotEq :: (HasCallStack, Eq a, Show a) => String -> a -> a -> YesodExample site ()
 assertNotEq m a b =
   liftIO $ HUnit.assertBool msg (a /= b)
   where msg = "Assertion: " ++ m ++ "\n" ++
               "Both arguments:  " ++ ppShow a ++ "\n"
 
 {-# DEPRECATED assertEqual "Use assertEq instead" #-}
-assertEqual :: (Eq a) => String -> a -> a -> YesodExample site ()
+assertEqual :: (HasCallStack, Eq a) => String -> a -> a -> YesodExample site ()
 assertEqual = assertEqualNoShow
 
 -- | Asserts that the two given values are equal.
 --
 -- @since 1.5.2
-assertEqualNoShow :: (Eq a) => String -> a -> a -> YesodExample site ()
+assertEqualNoShow :: (HasCallStack, Eq a) => String -> a -> a -> YesodExample site ()
 assertEqualNoShow msg a b = liftIO $ HUnit.assertBool msg (a == b)
 
 -- | Assert the last response status is as expected.
-statusIs :: Int -> YesodExample site ()
+statusIs :: HasCallStack => Int -> YesodExample site ()
 statusIs number = withResponse $ \ SResponse { simpleStatus = s } ->
   liftIO $ flip HUnit.assertBool (H.statusCode s == number) $ concat
     [ "Expected status was ", show number
@@ -367,7 +379,7 @@
     ]
 
 -- | Assert the given header key/value pair was returned.
-assertHeader :: CI BS8.ByteString -> BS8.ByteString -> YesodExample site ()
+assertHeader :: HasCallStack => CI BS8.ByteString -> BS8.ByteString -> YesodExample site ()
 assertHeader header value = withResponse $ \ SResponse { simpleHeaders = h } ->
   case lookup header h of
     Nothing -> failure $ T.pack $ concat
@@ -387,7 +399,7 @@
         ]
 
 -- | Assert the given header was not included in the response.
-assertNoHeader :: CI BS8.ByteString -> YesodExample site ()
+assertNoHeader :: HasCallStack => CI BS8.ByteString -> YesodExample site ()
 assertNoHeader header = withResponse $ \ SResponse { simpleHeaders = h } ->
   case lookup header h of
     Nothing -> return ()
@@ -400,14 +412,14 @@
 
 -- | Assert the last response is exactly equal to the given text. This is
 -- useful for testing API responses.
-bodyEquals :: String -> YesodExample site ()
+bodyEquals :: HasCallStack => String -> YesodExample site ()
 bodyEquals text = withResponse $ \ res ->
   liftIO $ HUnit.assertBool ("Expected body to equal " ++ text) $
     (simpleBody res) == encodeUtf8 (TL.pack text)
 
 -- | Assert the last response has the given text. The check is performed using the response
 -- body in full text form.
-bodyContains :: String -> YesodExample site ()
+bodyContains :: HasCallStack => String -> YesodExample site ()
 bodyContains text = withResponse $ \ res ->
   liftIO $ HUnit.assertBool ("Expected body to contain " ++ text) $
     (simpleBody res) `contains` text
@@ -415,7 +427,7 @@
 -- | Assert the last response doesn't have the given text. The check is performed using the response
 -- body in full text form.
 -- @since 1.5.3
-bodyNotContains :: String -> YesodExample site ()
+bodyNotContains :: HasCallStack => String -> YesodExample site ()
 bodyNotContains text = withResponse $ \ res ->
   liftIO $ HUnit.assertBool ("Expected body not to contain " ++ text) $
     not $ contains (simpleBody res) text
@@ -425,7 +437,7 @@
 
 -- | Queries the HTML using a CSS selector, and all matched elements must contain
 -- the given string.
-htmlAllContain :: Query -> String -> YesodExample site ()
+htmlAllContain :: HasCallStack => Query -> String -> YesodExample site ()
 htmlAllContain query search = do
   matches <- htmlQuery query
   case matches of
@@ -437,7 +449,7 @@
 -- element contains the given string.
 --
 -- Since 0.3.5
-htmlAnyContain :: Query -> String -> YesodExample site ()
+htmlAnyContain :: HasCallStack => Query -> String -> YesodExample site ()
 htmlAnyContain query search = do
   matches <- htmlQuery query
   case matches of
@@ -450,7 +462,7 @@
 -- inverse of htmlAnyContains).
 --
 -- Since 1.2.2
-htmlNoneContain :: Query -> String -> YesodExample site ()
+htmlNoneContain :: HasCallStack => Query -> String -> YesodExample site ()
 htmlNoneContain query search = do
   matches <- htmlQuery query
   case DL.filter (DL.isInfixOf search) (map (TL.unpack . decodeUtf8) matches) of
@@ -460,7 +472,7 @@
 
 -- | Performs a CSS query on the last response and asserts the matched elements
 -- are as many as expected.
-htmlCount :: Query -> Int -> YesodExample site ()
+htmlCount :: HasCallStack => Query -> Int -> YesodExample site ()
 htmlCount query count = do
   matches <- fmap DL.length $ htmlQuery query
   liftIO $ flip HUnit.assertBool (matches == count)
diff --git a/yesod-test.cabal b/yesod-test.cabal
--- a/yesod-test.cabal
+++ b/yesod-test.cabal
@@ -1,5 +1,5 @@
 name:               yesod-test
-version:            1.5.7
+version:            1.5.8
 license:            MIT
 license-file:       LICENSE
 author:             Nubis <nubis@woobiz.com.ar>