diff --git a/tests/tests/swfs/avm2/vector_concat/Test.as b/tests/tests/swfs/avm2/vector_concat/Test.as
index 73fdcc7d8..5583801ad 100644
--- a/tests/tests/swfs/avm2/vector_concat/Test.as
+++ b/tests/tests/swfs/avm2/vector_concat/Test.as
@@ -1,5 +1,10 @@
-package {
-	public class Test {
+// compiled with mxmlc
+
+package {
+	import flash.display.MovieClip;
+	public class Test extends MovieClip {
+		public function Test(){
+		}
 	}
 }
 
@@ -57,6 +62,12 @@ var c_class = a_class.concat(b_class);
 trace("/// (contents of c_class...)");
 trace_vector(c_class);
 
+trace("var c_class_flipped = b_class.concat(new<Superclass>[new Subclass()]);");
+var c_class_flipped = b_class.concat(new<Superclass>[new Subclass()]);
+
+trace("/// (contents of c_class_flipped...)");
+trace_vector(c_class_flipped);
+
 interface Interface {
 	
 }
diff --git a/tests/tests/swfs/avm2/vector_concat/output.txt b/tests/tests/swfs/avm2/vector_concat/output.txt
index a82209556..6602d6252 100644
--- a/tests/tests/swfs/avm2/vector_concat/output.txt
+++ b/tests/tests/swfs/avm2/vector_concat/output.txt
@@ -21,6 +21,11 @@ false
 [object Superclass]
 [object Subclass]
 [object Subclass]
+var c_class_flipped = b_class.concat(new<Superclass>[new Subclass()]);
+/// (contents of c_class_flipped...)
+///length:  2
+[object Subclass]
+[object Subclass]
 /// var a_iface: Vector.<Interface> = new <Interface>[];
 /// a_iface.length = 1;
 /// a_iface[0] = new Implementer();
diff --git a/tests/tests/swfs/avm2/vector_concat/test.fla b/tests/tests/swfs/avm2/vector_concat/test.fla
deleted file mode 100644
index 658d800a1..000000000
Binary files a/tests/tests/swfs/avm2/vector_concat/test.fla and /dev/null differ
diff --git a/tests/tests/swfs/avm2/vector_concat/test.swf b/tests/tests/swfs/avm2/vector_concat/test.swf
index 68753fd99..f556b6133 100644
Binary files a/tests/tests/swfs/avm2/vector_concat/test.swf and b/tests/tests/swfs/avm2/vector_concat/test.swf differ