diff --git a/test/tasty/run/src-2/tastytest/TestIOApp.scala b/test/tasty/run/src-2/tastytest/TestIOApp.scala
new file mode 100644
index 000000000000..e118f76f3308
--- /dev/null
+++ b/test/tasty/run/src-2/tastytest/TestIOApp.scala
@@ -0,0 +1,22 @@
+package tastytest
+
+/** test calling $init$ on IOApp parent */
+object TestIOApp extends Suite("TestIOApp") {
+
+  def randOver5 = scala.util.Random.nextInt(5) + 5
+
+  object Static extends IOApp.Simple {
+    def run = assert(randOver5 >= 5)
+  }
+
+  test("static IOApp")(Static.run)
+
+  test("local IOApp") {
+    val Local = new IOApp.Simple {
+      def run = assert(randOver5 >= 5)
+    }
+    Local.run
+  }
+
+
+}
diff --git a/test/tasty/run/src-2/tastytest/TestTraitInitsBase.scala b/test/tasty/run/src-2/tastytest/TestTraitInitsBase.scala
new file mode 100644
index 000000000000..799b49e62619
--- /dev/null
+++ b/test/tasty/run/src-2/tastytest/TestTraitInitsBase.scala
@@ -0,0 +1,15 @@
+package tastytest
+
+/** test calling $init$ on TraitInitsBase.SubTrait parent */
+object TestTraitInitsBase extends Suite("TestTraitInitsBase") {
+
+  object Static extends TraitInitsBase.SubTrait {}
+
+  test("static SubTrait")(assert(Static.foo === 23))
+
+  test("local SubTrait") {
+    val Local = new TraitInitsBase.SubTrait {}
+    assert(Local.foo === 23)
+  }
+
+}
diff --git a/test/tasty/run/src-3/tastytest/IOApp.scala b/test/tasty/run/src-3/tastytest/IOApp.scala
new file mode 100644
index 000000000000..6367f2b459f4
--- /dev/null
+++ b/test/tasty/run/src-3/tastytest/IOApp.scala
@@ -0,0 +1,23 @@
+package tastytest
+
+trait IOApp {
+  protected val foo = 23
+
+  def run(args: List[String]): Int
+
+  final def main(args: Array[String]): Unit = {
+    sys.exit(run(args.toList))
+  }
+
+}
+
+object IOApp {
+  trait Simple extends IOApp {
+    def run: Unit
+
+    final def run(args: List[String]): Int = {
+      run
+      0
+    }
+  }
+}
diff --git a/test/tasty/run/src-3/tastytest/TraitInitsBase.scala b/test/tasty/run/src-3/tastytest/TraitInitsBase.scala
new file mode 100644
index 000000000000..9346aba10d16
--- /dev/null
+++ b/test/tasty/run/src-3/tastytest/TraitInitsBase.scala
@@ -0,0 +1,8 @@
+package tastytest
+
+trait TraitInitsBase {
+  val foo = 23
+}
+object TraitInitsBase {
+  trait SubTrait extends TraitInitsBase
+}