diff --git a/CHANGELOG.md b/CHANGELOG.md
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,9 @@
 Changelog for tmp-postgres
 
+1.31.0.0
+  #224 Remove defaultPostgresConf
+  #223 Doc fixes
+
 1.30.0.1
   #221 Make verboseConfig support pgbadger
   #218 Document difference between takeSnapshot and cacheAction
diff --git a/src/Database/Postgres/Temp.hs b/src/Database/Postgres/Temp.hs
--- a/src/Database/Postgres/Temp.hs
+++ b/src/Database/Postgres/Temp.hs
@@ -55,7 +55,6 @@
   -- *** Defaults
   , defaultConfig
   , defaultConfig_9_3_10
-  , defaultPostgresConf
   , verboseConfig
   -- *** Custom Config builder helpers
   , optionsToDefaultConfig
diff --git a/src/Database/Postgres/Temp/Internal.hs b/src/Database/Postgres/Temp/Internal.hs
--- a/src/Database/Postgres/Temp/Internal.hs
+++ b/src/Database/Postgres/Temp/Internal.hs
@@ -131,6 +131,10 @@
   , ("log_min_error_statement", "PANIC")
   , ("log_statement", "none")
   , ("client_min_messages", "ERROR")
+  , ("commit_delay", "100000")
+  , ("wal_level", "minimal")
+  , ("archive_mode", "off")
+  , ("max_wal_senders", "0")
   ]
 
 {-|
@@ -150,6 +154,10 @@
 log_min_error_statement = PANIC
 log_statement = none
 client_min_messages = ERROR
+commit_delay = 100000
+wal_level = minimal
+archive_mode = off
+max_wal_senders = 0
 @
 
 'defaultConfig' also passes the @--no-sync@ flag to @initdb@.
@@ -219,24 +227,6 @@
     }
   }
 
-
-{-|
-'mappend' the 'defaultConfig' with a 'Config' that provides additional
-   \"postgresql.conf\" lines. Equivalent to:
-
-@
-'defaultPostgresConf' extra = 'defaultConfig' <> mempty
-  { 'postgresConfigFile' = extra
-  }
-@
-
-@since 1.21.0.0
--}
-defaultPostgresConf :: [(String, String)] -> Config
-defaultPostgresConf extra = defaultConfig <> mempty
-  { postgresConfigFile = extra
-  }
-
 -- | Default postgres options
 --
 --   @since 1.21.0.0
@@ -707,16 +697,14 @@
   let result = config <> fromFilePathConfig fixCachePath
   nonEmpty <- doesFileExist $ fixCachePath <> "/PG_VERSION"
 
-  case nonEmpty of
-    True -> pure $ pure result
-    False -> fmap join $ withConfig config $ \db -> do
-      action db
-      -- TODO see if parallel is better
-      throwIfNotSuccess id =<< stopPostgresGracefully db
-      createDirectoryIfMissing True fixCachePath
+  if nonEmpty then pure $ pure result else fmap join $ withConfig config $ \db -> do
+    action db
+    -- TODO see if parallel is better
+    throwIfNotSuccess id =<< stopPostgresGracefully db
+    createDirectoryIfMissing True fixCachePath
 
-      let snapshotCopyCmd = cpFlags <>
-            toDataDirectory db <> "/* " <> fixCachePath
-      system snapshotCopyCmd >>= \case
-        ExitSuccess -> pure $ pure result
-        x -> pure $ Left $ SnapshotCopyFailed snapshotCopyCmd x
+    let snapshotCopyCmd = cpFlags <>
+          toDataDirectory db <> "/* " <> fixCachePath
+    system snapshotCopyCmd >>= \case
+      ExitSuccess -> pure $ pure result
+      x -> pure $ Left $ SnapshotCopyFailed snapshotCopyCmd x
diff --git a/test/Main.hs b/test/Main.hs
--- a/test/Main.hs
+++ b/test/Main.hs
@@ -382,11 +382,6 @@
       either throwIO pure <=< withConfig (cacheConfig cacheInfo <> verboseConfig) $ \db -> do
         assertConnection db
         withConn db $ \conn -> countDbs conn `shouldReturn` 3
-
-  it "postgresql.conf append last wins" $
-    withConfig' (verboseConfig <> defaultPostgresConf [("fsync", "on")]) $ \db -> do
-      toPostgresqlConfigFile db `shouldContain` "fsync=on"
-      withConn db $ \conn -> countDbs conn `shouldReturn` 3
 --
 -- Error Plans. Can't be combined. Just list them out inline since they can't be combined
 --
@@ -683,11 +678,12 @@
     shouldSatisfy (Set.fromList $ words dbString) $
       Set.isSubsetOf wordsToSearchFor
 
-  let justBackupResources = defaultPostgresConf
-        [ ("wal_level", "replica")
-        , ("archive_mode","on")
-        , ("max_wal_senders","2")
-        ]
+  let justBackupResources = mempty { postgresConfigFile =
+          [ ("wal_level", "replica")
+          , ("archive_mode","on")
+          , ("max_wal_senders","2")
+          ]
+        }
       backupResources = justBackupResources
 
   it "can support backup and restore" $ withConfig' backupResources $ \db@DB {..} -> do
diff --git a/tmp-postgres.cabal b/tmp-postgres.cabal
--- a/tmp-postgres.cabal
+++ b/tmp-postgres.cabal
@@ -1,5 +1,5 @@
 name:                tmp-postgres
-version:             1.30.0.1
+version:             1.31.0.0
 synopsis: Start and stop a temporary postgres
 description: Start and stop a temporary postgres. See README.md
 homepage:            https://github.com/jfischoff/tmp-postgres#readme