diff --git a/tests/playground/task_test.lean b/tests/playground/task_test.lean
index 383091ad5d..636ce43bc3 100644
--- a/tests/playground/task_test.lean
+++ b/tests/playground/task_test.lean
@@ -13,8 +13,8 @@ dbgTrace ("f2: " ++ toString x) $ fun  _ =>
   g x
 
 def main (xs : List String) : IO UInt32 :=
-let t1 := Task.mk $ (fun _ => f1 xs.head.toNat) in
-let t2 := Task.mk $ (fun _ => f2 xs.head.toNat) in
+let t1 := Task.mk $ (fun _ => f1 xs.head.toNat);
+let t2 := Task.mk $ (fun _ => f2 xs.head.toNat);
 dbgSleep 1000 $ fun _ =>
 IO.println (toString t1.get ++ " " ++ toString t2.get) *>
 pure 0
diff --git a/tests/playground/task_test2.lean b/tests/playground/task_test2.lean
index d5e26e1ae5..3d0a8aa9ca 100644
--- a/tests/playground/task_test2.lean
+++ b/tests/playground/task_test2.lean
@@ -5,8 +5,8 @@ n.repeat (fun r =>
 0
 
 def main (xs : List String) : IO UInt32 :=
-let ys := (List.replicate xs.head.toNat 1) in
-let ts : List (Task Nat) := (List.iota 10).map (fun i => Task.mk $ fun _ => run1 (i+1) xs.head.toNat ys) in
-let ns : List Nat := ts.map Task.get in
+let ys := (List.replicate xs.head.toNat 1);
+let ts : List (Task Nat) := (List.iota 10).map (fun i => Task.mk $ fun _ => run1 (i+1) xs.head.toNat ys);
+let ns : List Nat := ts.map Task.get;
 IO.println (">> " ++ toString ns) *>
 pure 0
diff --git a/tests/playground/task_test3.lean b/tests/playground/task_test3.lean
index a3efb5ccc0..b23d687573 100644
--- a/tests/playground/task_test3.lean
+++ b/tests/playground/task_test3.lean
@@ -5,8 +5,8 @@ n.repeat (fun r =>
 0
 
 def main (xs : List String) : IO UInt32 :=
-let ys := (List.replicate xs.head.toNat 1) in
-let ts : List (Task Nat) := (List.iota 10).map (fun i => Task.mk $ fun _ => run1 (i+1) xs.head.toNat ys) in
-let ns : List Nat := ts.map Task.get in
+let ys := (List.replicate xs.head.toNat 1);
+let ts : List (Task Nat) := (List.iota 10).map (fun i => Task.mk $ fun _ => run1 (i+1) xs.head.toNat ys);
+let ns : List Nat := ts.map Task.get;
 IO.println (">> " ++ toString ns) *>
 pure 0
diff --git a/tests/playground/task_test4.lean b/tests/playground/task_test4.lean
index 46b53a7db7..1c95e5a60c 100644
--- a/tests/playground/task_test4.lean
+++ b/tests/playground/task_test4.lean
@@ -1,12 +1,12 @@
 def run1 (i : Nat) (n : Nat) (xs : List Nat) : Nat :=
 n.repeat (fun r =>
-  let s := (">> [" ++ toString i ++ "] " ++ toString r) in
+  let s := (">> [" ++ toString i ++ "] " ++ toString r);
   xs.foldl (fun a b => a + b) (r + s.length))
 0
 
 def main (xs : List String) : IO UInt32 :=
-let ys := (List.replicate xs.head.toNat 1) in
-let ts : List (Task Nat) := (List.iota 10).map (fun i => Task.mk $ fun _ => run1 (i+1) xs.head.toNat ys) in
-let ns : List Nat := ts.map Task.get in
+let ys := (List.replicate xs.head.toNat 1);
+let ts : List (Task Nat) := (List.iota 10).map (fun i => Task.mk $ fun _ => run1 (i+1) xs.head.toNat ys);
+let ns : List Nat := ts.map Task.get;
 IO.println (">> " ++ toString ns) *>
 pure 0