diff --git a/tests b/tests
index 3068907e0e97c841b7155c30422e90faf51f232c..f0ed45c9570ff47faca48e0a32772c2bece3ef3d 100644
--- a/tests
+++ b/tests
@@ -70,6 +70,8 @@ static int static_fn() { return 3; }
 
 int param_decay(int x[]) { return x[0]; }
 
+void voidfn() {}
+
 int main() {
   assert(8, ({ int a=3; int z=5; a+z; }), "int a=3; int z=5; a+z;");
 
@@ -451,6 +453,8 @@ int main() {
   assert(2, ({ int i=0; switch(1) { case 0: 0; case 1: 0; case 2: 0; i=2; } i; }), "int i=0; switch(1) { case 0: 0; case 1: 0; case 2: 0; i=2; } i;");
   assert(0, ({ int i=0; switch(3) { case 0: 0; case 1: 0; case 2: 0; i=2; } i; }), "int i=0; switch(3) { case 0: 0; case 1: 0; case 2: 0; i=2; } i;");
 
+  voidfn();
+
   printf("OK\n");
   return 0;
 }