diff --git a/package.yaml b/package.yaml
index 2f66d39..25c0bd9 100644
--- a/package.yaml
+++ b/package.yaml
@@ -102,4 +102,4 @@ tests:
     - linear
 # megaparsec-9.3 changed something in error messages
 # so that our tests do not pass.
-    - megaparsec < 9.3
+    - megaparsec < 9.3 || megaparsec >= 9.3.1