diff --git a/build-constraints.yaml b/build-constraints.yaml
index 4778cbce..836146c5 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -3916,6 +3916,7 @@ expected-test-failures:
     - bitx-bitcoin # https://github.com/tebello-thejane/bitx.hs/issues/4
     - http-link-header # https://github.com/myfreeweb/http-link-header/issues/7
     - courier # https://github.com/hargettp/courier/issues/19
+    - main-tester # https://github.com/fpco/stackage/pull/3528
 
     # Compilation failures
     - yeshql # https://bitbucket.org/tdammers/yeshql/issues/1/stackage-nightly-test-failure