diff --git a/tests/simple/arraycells.v b/tests/simple/arraycells.v
index 704ca3fda..fd85a1195 100644
--- a/tests/simple/arraycells.v
+++ b/tests/simple/arraycells.v
@@ -2,7 +2,7 @@
 module array_test001(a, b, c, y);
 	input a;
 	input [31:0] b, c;
-	input [31:0] y;
+	output [31:0] y;
 
 	aoi12 p [31:0] (a, b, c, y);
 endmodule