diff --git a/unittests/conversion_to_bool.chai b/unittests/conversion_to_bool.chai
new file mode 100644
index 0000000..d5512bf
--- /dev/null
+++ b/unittests/conversion_to_bool.chai
@@ -0,0 +1,17 @@
+
+// all we care is that this executes, really
+
+add_type_conversion(type("int"), type("bool"), fun(int i) { return i != 0; });
+
+if (0) {
+  assert_true(false);
+}
+
+while (0) {
+  assert_true(false);
+}
+
+for (; 0; ) {
+  assert_true(false);
+}
+