diff --git a/build-constraints.yaml b/build-constraints.yaml
index e711cef1..fd434865 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -4831,7 +4831,7 @@ skipped-tests:
     - http-media # base-4.13
 
     # fails with ghc 8.8
-    - alex # as of alex-3.2.4
+    # alex # as of alex-3.2.4
 
     # Cyclic dependencies
     - base-orphans # via hspec
@@ -5368,7 +5368,6 @@ expected-test-failures:
     - haddock
     - haskell-tools-builtin-refactorings
     - hweblib # https://github.com/aycanirican/hweblib/issues/3
-    - libraft # https://github.com/commercialhaskell/stackage/issues/4337#issuecomment-462465921
     - multiset # doctests require Glob, a hidden package
     - perf # https://github.com/fpco/stackage/pull/2859
     - picosat # https://github.com/fpco/stackage/pull/2382
@@ -5522,7 +5521,7 @@ expected-haddock-failures:
     # https://github.com/haskell/haddock/issues/1091
     - vault
     # commercialhaskell/stackage#4904
-    - monoid-subclasses
+    # monoid-subclasses
 # end of expected-haddock-failures
 
 # For packages with haddock issues