Reject immediate block Undo header

1 files changed, 3 insertions, 2 deletions

diff --git a/test/cases/unhead.bqn b/test/cases/unhead.bqn
index be77cf86..3e1e6ad2 100644
--- a/test/cases/unhead.bqn
+++ b/test/cases/unhead.bqn
@@ -11,11 +11,12 @@
 ! % {𝔽⁼_𝕣𝕩: 𝔽⁼𝕩}
 
 # Invalid header use
+! % {o⁼:0}
 ! % {𝕊⁼𝕩:𝕨}
 ! % {𝕩 ; 𝕊⁼:𝕩}
 ! % {𝔽_𝕣 𝕩: 𝕘}
-#! % {𝔽_𝕣: 1+𝔽; 𝔽_𝕣⁼: 𝔽-⟜1}
-#! % {𝕗_𝕣_𝕘 ⁼: 3}
+! % {𝔽_𝕣: 1+𝔽; 𝔽_𝕣⁼: 𝔽-⟜1}
+! % {𝕗_𝕣_𝕘 ⁼: 3}
 ! % {𝕗_𝕣_𝕘˜⁼: 3}
 ! % {𝕊˜⁼𝕩: 𝕨-𝕩}
 ! % {𝔽_𝕣_𝔾˜⁼ 𝕩: 𝕗‿𝕘‿𝕩}