diff --git a/testsuite/flattening/modelica/scodeinst/Makefile b/testsuite/flattening/modelica/scodeinst/Makefile
index 8ece8489d50..71730223559 100644
--- a/testsuite/flattening/modelica/scodeinst/Makefile
+++ b/testsuite/flattening/modelica/scodeinst/Makefile
@@ -750,6 +750,7 @@ Size2.mo \
 Size3.mo \
 Size4.mo \
 Size5.mo \
+Size6.mo \
 SizeInvalidArgs1.mo \
 SizeInvalidArgs2.mo \
 SizeInvalidIndex1.mo \
diff --git a/testsuite/flattening/modelica/scodeinst/Size6.mo b/testsuite/flattening/modelica/scodeinst/Size6.mo
new file mode 100644
index 00000000000..9a5a91bb130
--- /dev/null
+++ b/testsuite/flattening/modelica/scodeinst/Size6.mo
@@ -0,0 +1,33 @@
+// name: Size6
+// keywords: size
+// status: correct
+// cflags: -d=newInst
+//
+// Tests the builtin size operator.
+//
+
+type T = Real[4];
+
+model A
+  T x;
+end A;
+
+model Size6
+  Real x[n];
+  A a;
+  parameter Integer n = size(a.x, 1);
+end Size6;
+
+// Result:
+// class Size6
+//   Real x[1];
+//   Real x[2];
+//   Real x[3];
+//   Real x[4];
+//   Real a.x[1];
+//   Real a.x[2];
+//   Real a.x[3];
+//   Real a.x[4];
+//   parameter Integer n = 4;
+// end Size6;
+// endResult