diff --git a/src/test/test-macro.c b/src/test/test-macro.c
index 049ea2c14e1..001166d0dcc 100644
--- a/src/test/test-macro.c
+++ b/src/test/test-macro.c
@@ -209,6 +209,16 @@ TEST(in_set) {
         assert_se(IN_SET(4, 1, 2, 3, 4));
         assert_se(!IN_SET(0, 1));
         assert_se(!IN_SET(0, 1, 2, 3, 4));
+
+        struct {
+                unsigned x:3;
+        } t = { 1 };
+
+        assert_se(IN_SET(t.x, 1));
+        assert_se(IN_SET(t.x, 1, 2, 3, 4));
+        assert_se(IN_SET(t.x, 2, 3, 4, 1));
+        assert_se(!IN_SET(t.x, 0));
+        assert_se(!IN_SET(t.x, 2, 3, 4));
 }
 
 TEST(foreach_pointer) {