diff --git a/test/th-dlls/cabal.project b/test/th-dlls/cabal.project
index f686c244f5..e780e52e1d 100644
--- a/test/th-dlls/cabal.project
+++ b/test/th-dlls/cabal.project
@@ -3,4 +3,9 @@ packages: .
 -- network-3.1.3.0 results in: unknown symbol `socketpair'
 -- See https://github.com/haskell/network/issues/550
 constraints: network <3.1.3.0 || >3.1.3.0
+           , text source
+           , text -simdutf
+
+package text
+    flags: -simdutf