diff --git a/testsuite/flattening/modelica/scodeinst/ExpandableConnectorNonDecl4.mo b/testsuite/flattening/modelica/scodeinst/ExpandableConnectorNonDecl4.mo
new file mode 100644
index 00000000000..be01536cbf6
--- /dev/null
+++ b/testsuite/flattening/modelica/scodeinst/ExpandableConnectorNonDecl4.mo
@@ -0,0 +1,27 @@
+// name: ExpandableConnectorNonDecl4
+// keywords: expandable connector
+// status: incorrect
+// cflags: -d=newInst
+//
+//
+
+connector RealInput = input Real;
+
+expandable connector EC
+end EC;
+
+model ExpandableConnectorNonDecl4
+  RealInput ri;
+equation
+  connect(EC.ri, ri);
+end ExpandableConnectorNonDecl4;
+
+// Result:
+// Error processing file: ExpandableConnectorNonDecl4.mo
+// [flattening/modelica/scodeinst/ExpandableConnectorNonDecl4.mo:16:3-16:21:writable] Error: Variable EC.ri not found in scope ExpandableConnectorNonDecl4.
+//
+// # Error encountered! Exiting...
+// # Please check the error message and the flags.
+//
+// Execution failed!
+// endResult
diff --git a/testsuite/flattening/modelica/scodeinst/Makefile b/testsuite/flattening/modelica/scodeinst/Makefile
index 5fe3c176dcd..90c970399dc 100644
--- a/testsuite/flattening/modelica/scodeinst/Makefile
+++ b/testsuite/flattening/modelica/scodeinst/Makefile
@@ -344,6 +344,7 @@ ExpandableConnectorFlow2.mo \
 ExpandableConnectorNonDecl1.mo \
 ExpandableConnectorNonDecl2.mo \
 ExpandableConnectorNonDecl3.mo \
+ExpandableConnectorNonDecl4.mo \
 ExpandableConnectorPresent1.mo \
 ExpandableConnectorPresent2.mo \
 Extends1.mo \