diff --git a/build-constraints.yaml b/build-constraints.yaml
index 08077dab..1070803e 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -121,7 +121,8 @@ packages:
     "Omari Norman <omari@smileystation.com>":
         - barecheck
         - rainbow
-        - rainbow-tests
+        # https://github.com/fpco/stackage/issues/421
+        #- rainbow-tests
         - quickpull
 
     "Neil Mitchell":