diff --git a/project/Build.scala b/project/Build.scala
index fb179f51ad6d..e2fa9277ec64 100644
--- a/project/Build.scala
+++ b/project/Build.scala
@@ -177,7 +177,7 @@ object Build {
     outputStrategy := Some(StdoutOutput),
 
     // enable verbose exception messages for JUnit
-    (Test / testOptions) += Tests.Argument(TestFrameworks.JUnit, "-a", "-v"),
+    (Test / testOptions) += Tests.Argument(TestFrameworks.JUnit, "-a", "-v", "-s"),
   ) ++
     // Spawns a repl with the correct classpath
     addCommandAlias("repl", "scala3-compiler-bootstrapped/console")