diff --git a/accelerate-tensorflow-lite/test/nofib/Data/Array/Accelerate/Test/NoFib/Unit.hs b/accelerate-tensorflow-lite/test/nofib/Data/Array/Accelerate/Test/NoFib/Unit.hs
index e9060bd..533a4bc 100644
--- a/accelerate-tensorflow-lite/test/nofib/Data/Array/Accelerate/Test/NoFib/Unit.hs
+++ b/accelerate-tensorflow-lite/test/nofib/Data/Array/Accelerate/Test/NoFib/Unit.hs
@@ -2,6 +2,7 @@
 {-# LANGUAGE FlexibleContexts    #-}
 {-# LANGUAGE ScopedTypeVariables #-}
 {-# LANGUAGE TypeApplications    #-}
+{-# LANGUAGE TypeOperators       #-}
 -- |
 -- Module      : Data.Array.Accelerate.Test.NoFib.Prelude.Map
 -- Copyright   : [2022] The Accelerate Team
@@ -40,6 +41,7 @@ test_unit tc =
   testGroup "unit"
     [ testProperty "sum_generate_2" $ prop_sum_generate_2 tc
     , testProperty "generate_2" $ prop_generate_2 tc
+    , tree_sum3mod4 tc
     ]
 
 prop_sum_generate_2 :: TestContext -> Property
@@ -68,3 +70,46 @@ prop_generate_2 tc = property $ do
   xs2  <- forAll (array ForInput sh f32)
   let f a b = A.generate (A.constant sh) (\i -> a ! i + b ! i)
   tpuTestCase tc f (P.zipWith (\a b -> a :-> b :-> Result sh) dat1 dat2) xs1 xs2
+
+tree_sum3mod4 :: TestContext -> TestTree
+tree_sum3mod4 tc =
+  localOption (HedgehogTestLimit (Just 1)) $
+  testGroup "sum3mod4" $
+    concat [[testDim3 2 2 2]
+           ,[testDim3 1 1 n | n <- [1..20]]
+           ,[testDim3 2 1 n | n <- [1..20]]
+           ,[testDim3 3 1 n | n <- [1..20]]
+           ,[testDim3 4 1 n | n <- [1..20]]
+           ,[testDim3 5 1 n | n <- [1..20]]
+           ,[testDim3 3 2 n | n <- [1..20]]
+           ,[testDim3 1 1 n | n <- [1..20]]
+           ,[testDim3 1 2 n | n <- [1..20]]
+           ,[testDim3 1 3 n | n <- [1..20]]
+           ,[testDim2 1 n | n <- [1..20]]
+           ,[testDim2 2 n | n <- [1..20]]
+           ,[testDim2 3 n | n <- [1..20]]
+           ]
+  where
+    testDim2 :: Int -> Int -> TestTree
+    testDim2 a b =
+      testProperty (show a P.++ " " P.++ show b) $
+        prop_sum (return (Z :. a :. b)) f32
+
+    testDim3 :: Int -> Int -> Int -> TestTree
+    testDim3 a b c =
+      testProperty (show a P.++ " " P.++ show b P.++ " " P.++ show c) $
+        prop_sum (return (Z :. a :. b :. c)) f32
+
+    prop_sum
+        :: (P.Eq sh, Show sh, Shape sh, A.Num e, Show e, Similar e)
+        => Gen (sh :. Int)
+        -> (WhichData -> Gen e)
+        -> Property
+    prop_sum dim e =
+      property $ do
+        sh@(shtail :. _) <- forAll dim
+        ndat <- forAll (Gen.int (Range.linear 10 16))
+        dat <- forAll (do arrs <- Gen.list (Range.singleton ndat) (array ForSample sh e)
+                          return [arr :-> Result shtail | arr <- arrs])
+        xs  <- forAll (array ForInput sh e)
+        tpuTestCase tc A.sum dat xs