diff --git a/build-constraints.yaml b/build-constraints.yaml
index b07cfe50..6fe40b7b 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -1428,7 +1428,7 @@ packages:
         - servant-swagger-ui-redoc
         - servant-yaml
         - singleton-bool
-        - spdx < 0 # GHC 8.4 via base-4.11.0.0
+        - spdx < 0 # needs QuickCheck 2.12
         - splitmix
         - step-function
         - tdigest
@@ -4163,7 +4163,6 @@ packages:
         - tasty-dejafu < 0
         - tasty-stats < 0
         - tcp-streams-openssl < 0
-        - tdigest < 0
         - telegram-bot-simple < 0
         - termbox < 0
         - termonad < 0
@@ -4669,7 +4668,6 @@ skipped-tests:
     - integer-logarithms
     - postgresql-simple-url
     - range-set-list
-    - spdx
     - time-parsers
     - time-parsers
     - vec
@@ -4714,7 +4712,6 @@ expected-test-failures:
     - nsis # Intermittent on non-Windows systems
     - pandoc # https://github.com/commercialhaskell/stackage/issues/3719
     - pandoc-citeproc # https://github.com/jgm/pandoc-citeproc/issues/172
-    - spdx # https://github.com/phadej/spdx/issues/8
     - statistics # https://github.com/bos/statistics/issues/42
 
     # Timeouts