diff --git a/hledger-lib/test/unittest.hs b/hledger-lib/test/unittest.hs
index 34bb6cd46..f64365ff9 100644
--- a/hledger-lib/test/unittest.hs
+++ b/hledger-lib/test/unittest.hs
@@ -5,7 +5,9 @@ Run the hledger-lib package's unit tests using the tasty test runner.
 -- package-qualified import to avoid cabal missing-home-modules warning (and double-building ?)
 {-# LANGUAGE PackageImports #-}
 import "hledger-lib" Hledger (tests_Hledger)
-
+import System.Environment (setEnv)
 import Test.Tasty (defaultMain)
 
-main = defaultMain tests_Hledger
+main = do
+  setEnv "TASTY_HIDE_SUCCESSES" "1"
+  defaultMain tests_Hledger
diff --git a/hledger/test/unittest.hs b/hledger/test/unittest.hs
index d08ad8fdd..21b338f93 100644
--- a/hledger/test/unittest.hs
+++ b/hledger/test/unittest.hs
@@ -7,7 +7,9 @@ Run the hledger package's unit tests using the tasty test runner
 -- {-# LANGUAGE PackageImports #-}
 -- import "hledger" Hledger.Cli (tests_Hledger_Cli)
 import Hledger.Cli (tests_Hledger_Cli)
-
+import System.Environment (setEnv)
 import Test.Tasty (defaultMain)
 
-main = defaultMain tests_Hledger_Cli
+main = do
+  setEnv "TASTY_HIDE_SUCCESSES" "1"
+  defaultMain tests_Hledger_Cli