From a8031de729d30e08d45f483c73e20e728a1e1d06 Mon Sep 17 00:00:00 2001
From: Simon Michael <simon@joyful.com>
Date: Sat, 18 Aug 2018 19:26:07 +0100
Subject: [PATCH] tests: fix build error with GHC < 8.4

---
 hledger-lib/Hledger/Utils/Test.hs | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/hledger-lib/Hledger/Utils/Test.hs b/hledger-lib/Hledger/Utils/Test.hs
index 0e6a73b23..7dab6d969 100644
--- a/hledger-lib/Hledger/Utils/Test.hs
+++ b/hledger-lib/Hledger/Utils/Test.hs
@@ -1,3 +1,4 @@
+{-# LANGUAGE CPP #-}
 {-# LANGUAGE OverloadedStrings #-}
 {-# LANGUAGE ScopedTypeVariables #-}
 
@@ -27,6 +28,9 @@ module Hledger.Utils.Test (
 import Control.Exception
 import Control.Monad
 import Control.Monad.State.Strict (StateT, evalStateT)
+#if !(MIN_VERSION_base(4,11,0))
+import Data.Monoid ((<>))
+#endif
 import Data.CallStack
 import Data.Functor.Identity
 import Data.List