diff --git a/TestSuite/errors/err0291.pas b/TestSuite/errors/err0291.pas
new file mode 100644
index 000000000..9a48d97bc
--- /dev/null
+++ b/TestSuite/errors/err0291.pas
@@ -0,0 +1,4 @@
+begin
+  var a: byte;
+  var c := a is integer(var s);
+end.
\ No newline at end of file