diff --git a/compiler/src/dotty/tools/dotc/quoted/TreeCleaner.scala b/compiler/src/dotty/tools/dotc/quoted/TreeCleaner.scala
index 6035d8900c6c..93c203fffb12 100644
--- a/compiler/src/dotty/tools/dotc/quoted/TreeCleaner.scala
+++ b/compiler/src/dotty/tools/dotc/quoted/TreeCleaner.scala
@@ -38,8 +38,8 @@ class TreeCleaner extends tpd.TreeMap {
           case stat => stat :: Nil
         }
         expr1 match {
-          case Block(stats3, expr3) => Block(flatStats ::: stats3, expr3)
-          case expr3 => Block(flatStats, expr3)
+          case Block(stats3, expr3) => seq(flatStats ::: stats3, expr3)
+          case expr3 => seq(flatStats, expr3)
         }
       case tree1: TypeTree => TypeTree(tree1.tpe.subst(aliasesSyms, aliasesTypes))
       case tree1: Ident => aliases.get(tree1.symbol).getOrElse(tree1)
diff --git a/tests/run-with-compiler/i3847-b.check b/tests/run-with-compiler/i3847-b.check
index 49278cfb1655..8158391f2453 100644
--- a/tests/run-with-compiler/i3847-b.check
+++ b/tests/run-with-compiler/i3847-b.check
@@ -1,3 +1 @@
-{
-  new scala.Array[scala.List[scala.Int]](1)
-}
\ No newline at end of file
+new scala.Array[scala.List[scala.Int]](1)
diff --git a/tests/run-with-compiler/i4350.check b/tests/run-with-compiler/i4350.check
index 7d5fd0304324..45b028ad64cb 100644
--- a/tests/run-with-compiler/i4350.check
+++ b/tests/run-with-compiler/i4350.check
@@ -1,6 +1,2 @@
-{
-  null.asInstanceOf[lang.Object]
-}
-{
-  null.asInstanceOf[scala.Predef.String]
-}
+null.asInstanceOf[lang.Object]
+null.asInstanceOf[scala.Predef.String]
diff --git a/tests/run-with-compiler/shonan-hmm.check b/tests/run-with-compiler/shonan-hmm.check
index c4f1579e7497..1d524b5c4fc6 100644
--- a/tests/run-with-compiler/shonan-hmm.check
+++ b/tests/run-with-compiler/shonan-hmm.check
@@ -45,9 +45,7 @@ List(25, 30, 20, 43, 44)
 
 {
   val arr: scala.Array[scala.Array[scala.Int]] = {
-    val array: scala.Array[scala.Array[scala.Int]] = dotty.runtime.Arrays.newGenericArray[scala.Array[scala.Int]](5)({
-      scala.reflect.ClassTag.apply[scala.Array[scala.Int]](scala.Predef.classOf[scala.Array[scala.Int]])
-    })
+    val array: scala.Array[scala.Array[scala.Int]] = dotty.runtime.Arrays.newGenericArray[scala.Array[scala.Int]](5)(scala.reflect.ClassTag.apply[scala.Array[scala.Int]](scala.Predef.classOf[scala.Array[scala.Int]]))
     array.update(0, {
       val array$2: scala.Array[scala.Int] = new scala.Array[scala.Int](5)
       array$2.update(0, 5)
@@ -111,9 +109,7 @@ List(25, 30, 20, 43, 44)
 
 {
   val arr: scala.Array[scala.Array[scala.Int]] = {
-    val array: scala.Array[scala.Array[scala.Int]] = dotty.runtime.Arrays.newGenericArray[scala.Array[scala.Int]](5)({
-      scala.reflect.ClassTag.apply[scala.Array[scala.Int]](scala.Predef.classOf[scala.Array[scala.Int]])
-    })
+    val array: scala.Array[scala.Array[scala.Int]] = dotty.runtime.Arrays.newGenericArray[scala.Array[scala.Int]](5)(scala.reflect.ClassTag.apply[scala.Array[scala.Int]](scala.Predef.classOf[scala.Array[scala.Int]]))
     array.update(0, {
       val array$2: scala.Array[scala.Int] = new scala.Array[scala.Int](5)
       array$2.update(0, 5)
@@ -177,9 +173,7 @@ List(25, 30, 20, 43, 44)
 
 {
   val arr: scala.Array[scala.Array[scala.Int]] = {
-    val array: scala.Array[scala.Array[scala.Int]] = dotty.runtime.Arrays.newGenericArray[scala.Array[scala.Int]](5)({
-      scala.reflect.ClassTag.apply[scala.Array[scala.Int]](scala.Predef.classOf[scala.Array[scala.Int]])
-    })
+    val array: scala.Array[scala.Array[scala.Int]] = dotty.runtime.Arrays.newGenericArray[scala.Array[scala.Int]](5)(scala.reflect.ClassTag.apply[scala.Array[scala.Int]](scala.Predef.classOf[scala.Array[scala.Int]]))
     array.update(0, {
       val array$2: scala.Array[scala.Int] = new scala.Array[scala.Int](5)
       array$2.update(0, 5)