diff --git a/src/lib.rs b/src/lib.rs
index 6875027..07a3b6c 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -458,3 +458,9 @@ fn apply_profile_override(config: &mut VgpuConfig) -> bool {
 
     true
 }
+
+#[test]
+fn test_size() {
+    assert_eq!(mem::size_of::<VgpuStart>(), 0x420);
+    assert_eq!(mem::size_of::<VgpuConfig>(), 0x730);
+}