1 files changed, 9 insertions, 2 deletions
diff --git a/tests/objects/tobjcov.nim b/tests/objects/tobjcov.nim
index cf2e5becf..a12f74702 100644
--- a/tests/objects/tobjcov.nim
+++ b/tests/objects/tobjcov.nim
@@ -1,7 +1,15 @@
+discard """
+action: compile
+targets: "c"
+"""
+
 # Covariance is not type safe:
+# Note: `nim cpp` makes it a compile error (after codegen), even with:
+# `var f = cast[proc (x: var TA) {.nimcall.}](cast[pointer](bp))`, which
+# currently removes all the `cast` in cgen'd code, hence the compile error.
 
 type
-  TA = object of TObject
+  TA = object of RootObj
     a: int
   TB = object of TA
     b: array[0..5000_000, int]
@@ -14,4 +22,3 @@ proc bp(x: var TB) = x.b[high(x.b)] = -1
 var f = cast[proc (x: var TA) {.nimcall.}](bp)
 var a: TA
 f(a) # bp expects a TB, but gets a TA
-