diff --git a/containers-tests/benchmarks/Map.hs b/containers-tests/benchmarks/Map.hs
index b53a4914d..112a66b0c 100644
--- a/containers-tests/benchmarks/Map.hs
+++ b/containers-tests/benchmarks/Map.hs
@@ -21,7 +21,7 @@ main = do
         m_even = M.fromAscList elems_even :: M.Map Int Int
         m_odd = M.fromAscList elems_odd :: M.Map Int Int
     evaluate $ rnf [m, m_even, m_odd]
-    evaluate $ rnf elems_rev
+    evaluate $ rnf [elems_rev, elems_asc, elems_desc]
     defaultMain
         [ bench "lookup absent" $ whnf (lookup evens) m_odd
         , bench "lookup present" $ whnf (lookup evens) m_even
@@ -88,8 +88,11 @@ main = do
         , bench "intersection" $ whnf (M.intersection m) m_even
         , bench "split" $ whnf (M.split (bound `div` 2)) m
         , bench "fromList" $ whnf M.fromList elems
-        , bench "fromList-desc" $ whnf M.fromList (reverse elems)
-        , bench "fromAscList" $ whnf M.fromAscList elems
+        , bench "fromList-desc" $ whnf M.fromList elems_desc
+        , bench "fromAscList" $ whnf M.fromAscList elems_asc
+        , bench "fromAscListWithKey" $ whnf (M.fromAscListWithKey (\k v2 v1 -> k + v2 + v1)) elems_asc
+        , bench "fromDescList" $ whnf M.fromDescList elems_desc
+        , bench "fromDescListWithKey" $ whnf (M.fromDescListWithKey (\k v2 v1 -> k + v2 + v1)) elems_desc
         , bench "fromDistinctAscList" $ whnf M.fromDistinctAscList elems
         , bench "fromDistinctAscList:fusion" $ whnf (\n -> M.fromDistinctAscList [(i,i) | i <- [1..n]]) bound
         , bench "fromDistinctDescList" $ whnf M.fromDistinctDescList elems_rev
@@ -102,6 +105,10 @@ main = do
     elems_even = zip evens evens
     elems_odd = zip odds odds
     elems_rev = reverse elems
+    keys_asc = map (`div` 2) [1..bound]
+    elems_asc = zip keys_asc values
+    keys_desc = map (`div` 2) [bound,bound-1..1]
+    elems_desc = zip keys_desc values
     keys = [1..bound]
     evens = [2,4..bound]
     odds = [1,3..bound]
diff --git a/containers-tests/benchmarks/Set.hs b/containers-tests/benchmarks/Set.hs
index f65e2a620..add558753 100644
--- a/containers-tests/benchmarks/Set.hs
+++ b/containers-tests/benchmarks/Set.hs
@@ -14,7 +14,7 @@ main = do
         s_odd = S.fromAscList elems_odd :: S.Set Int
         strings_s = S.fromList strings
     evaluate $ rnf [s, s_even, s_odd]
-    evaluate $ rnf elems_rev
+    evaluate $ rnf [elems_rev, elems_asc, elems_desc]
     defaultMain
         [ bench "member" $ whnf (member elems) s
         , bench "insert" $ whnf (ins elems) S.empty
@@ -33,9 +33,10 @@ main = do
         , bench "intersection" $ whnf (S.intersection s) s_even
         , bench "fromList" $ whnf S.fromList elems
         , bench "fromList-desc" $ whnf S.fromList (reverse elems)
-        , bench "fromAscList" $ whnf S.fromAscList elems
+        , bench "fromAscList" $ whnf S.fromAscList elems_asc
         , bench "fromDistinctAscList" $ whnf S.fromDistinctAscList elems
         , bench "fromDistinctAscList:fusion" $ whnf (\n -> S.fromDistinctAscList [1..n]) bound
+        , bench "fromDescList" $ whnf S.fromDescList elems_desc
         , bench "fromDistinctDescList" $ whnf S.fromDistinctDescList elems_rev
         , bench "fromDistinctDescList:fusion" $ whnf (\n -> S.fromDistinctDescList [n,n-1..1]) bound
         , bench "disjoint:false" $ whnf (S.disjoint s) s_even
@@ -62,6 +63,8 @@ main = do
     elems_even = [2,4..bound]
     elems_odd = [1,3..bound]
     elems_rev = reverse elems
+    elems_asc = map (`div` 2) [1..bound]
+    elems_desc = map (`div` 2) [bound,bound-1..1]
     strings = map show elems
 
 member :: [Int] -> S.Set Int -> Int