diff --git a/hasql-postgres.cabal b/hasql-postgres.cabal
--- a/hasql-postgres.cabal
+++ b/hasql-postgres.cabal
@@ -1,13 +1,16 @@
 name:
   hasql-postgres
 version:
-  0.4.0
+  0.5.0
 synopsis:
   A "PostgreSQL" backend for the "hasql" library
 description:
   This library provides a \"PostgreSQL\" driver for 
   <http://hackage.haskell.org/package/hasql the "hasql" library>.
   .
+  It's tested against Postgres versions 8.3 and 9.3
+  with the @integer_datetimes@ setting off and on.
+  .
   According to the included benchmarks,
   it performs up to 2x faster than \"postgresql-simple\" and
   up to 7x faster than \"HDBC\".
@@ -72,7 +75,7 @@
     attoparsec == 0.12.*,
     -- database:
     hasql-backend == 0.1.*,
-    postgresql-binary == 0.2.*,
+    postgresql-binary == 0.3.*,
     postgresql-libpq == 0.9.*,
     -- data:
     uuid == 1.3.*,
@@ -123,7 +126,7 @@
     attoparsec == 0.12.*,
     -- database:
     hasql >= 0.1.4 && < 0.2,
-    postgresql-binary == 0.2.*,
+    postgresql-binary == 0.3.*,
     postgresql-libpq == 0.9.*,
     -- data:
     uuid == 1.3.*,
diff --git a/library/Hasql/Postgres.hs b/library/Hasql/Postgres.hs
--- a/library/Hasql/Postgres.hs
+++ b/library/Hasql/Postgres.hs
@@ -346,24 +346,21 @@
   parseResult = parseResultUsingMapping
 
 -- |
--- Maps to @timestamptz@.
--- 
--- /NOTICE/
--- 
--- Postgres does not store the timezone information of @timestamptz@.
--- Instead it stores a UTC value and silently interconverts 
--- the incoming and outgoing values into a local time 
--- of the client application according to client application's timezone.
--- 
--- This is a notoriously questionable design decision by the Postgres authors.
--- This is why it is instead recommended to use @timestamp@ and 'UTCTime',
--- while manually handling the timezone conversions on the application side.
+-- Maps to @timestamp@.
 instance Backend.Mapping Postgres LocalTime where
   renderValue = renderValueUsingMapping
   parseResult = parseResultUsingMapping
 
 -- |
--- Maps to @timestamp@.
+-- Maps to @timestamptz@.
+-- 
+-- /NOTICE/
+-- 
+-- Postgres does not store the timezone information of @timestamptz@.
+-- Instead it stores a UTC value and performs silent conversions
+-- to the currently set timezone, when dealt with in the text format.
+-- However this library bypasses the silent conversions
+-- and communicates with Postgres using the UTC values directly.
 instance Backend.Mapping Postgres UTCTime where
   renderValue = renderValueUsingMapping
   parseResult = parseResultUsingMapping
diff --git a/library/Hasql/Postgres/Mapping.hs b/library/Hasql/Postgres/Mapping.hs
--- a/library/Hasql/Postgres/Mapping.hs
+++ b/library/Hasql/Postgres/Mapping.hs
@@ -205,16 +205,16 @@
         [|Decoder.timetz|]
       ,
       (,,,)
-        [t|UTCTime|]
+        [t|LocalTime|]
         [|PTI.timestamp|]
-        [|const $ Encoder.timestamp|]
-        [|const $ Decoder.timestamp|]
+        [|Encoder.timestamp|]
+        [|Decoder.timestamp|]
       ,
       (,,,)
-        [t|LocalTime|]
+        [t|UTCTime|]
         [|PTI.timestamptz|]
-        [|const $ Encoder.timestamptz|]
-        [|const $ Decoder.timestamptz|]
+        [|Encoder.timestamptz|]
+        [|Decoder.timestamptz|]
       ,
       (,,,)
         [t|DiffTime|]
diff --git a/tests/Main.hs b/tests/Main.hs
--- a/tests/Main.hs
+++ b/tests/Main.hs
@@ -170,91 +170,12 @@
 prop_mappingOfListOverLazyByteString (x :: [LazyByteString]) =
   mappingProp x
 
-test_mappingOfBool =
-  session1 $ do
-    validMappingSession True
-    validMappingSession False
-
-test_mappingOfUTF8Char =
-  session1 $ do
-    validMappingSession 'Й'
-
--- Postgres does not allow the '/NUL' character in text data
-prop_mappingOfChar (v :: Char) =
-  (v /= '\NUL') ==>
-    mappingProp v
-
--- Postgres does not allow the '/NUL' character in text data
-prop_mappingOfText (v :: Text) =
-  (isNothing $ Data.Text.find (== '\NUL') v) ==>
-    mappingProp v
-
 prop_mappingOfLazyText (v :: LazyText) =
   (isNothing $ Data.Text.Lazy.find (== '\NUL') v) ==>
     mappingProp v
 
-prop_mappingOfByteString (v :: ByteString) =
-  mappingProp v
-
 prop_mappingOfLazyByteString (v :: LazyByteString) =
   mappingProp v
-
-prop_mappingOfInt (v :: Int) =
-  mappingProp v
-
-prop_mappingOfInt8 (v :: Int8) =
-  mappingProp v
-
-prop_mappingOfInt16 (v :: Int16) =
-  mappingProp v
-
-prop_mappingOfInt32 (v :: Int32) =
-  mappingProp v
-
-prop_mappingOfInt64 (v :: Int64) =
-  mappingProp v
-
-prop_mappingOfWord (v :: Word) =
-  mappingProp v
-
-prop_mappingOfWord8 (v :: Word8) =
-  mappingProp v
-
-prop_mappingOfWord16 (v :: Word16) =
-  mappingProp v
-
-prop_mappingOfWord32 (v :: Word32) =
-  mappingProp v
-
-prop_mappingOfWord64 (v :: Word64) =
-  mappingProp v
-
-prop_mappingOfFloat (v :: Float) =
-  floatEqProp v (fromJust $ unsafePerformIO $ session1 $ selectSelf v)
-
-prop_mappingOfDouble (v :: Double) =
-  floatEqProp v (fromJust $ unsafePerformIO $ session1 $ selectSelf v)
-
-prop_mappingOfScientific =
-  forAll scientificGen $ \v ->
-    mappingProp v
-
-prop_mappingOfDay (v :: Day) =
-  mappingProp v
-
-prop_mappingOfTimeOfDay (v :: TimeOfDay) =
-  forAll microsTimeOfDayGen $ \v -> 
-    mappingProp v
-
-prop_mappingOfLocalTime =
-  forAll microsLocalTimeGen $ \v -> 
-    mappingProp v
-
-prop_mappingOfUTCTime =
-  forAll gen $ \v ->
-    mappingProp v
-  where
-    gen = UTCTime <$> arbitrary <*> microsDiffTimeGen
 
 
 -- * Helpers