diff --git a/tests/KotlinTest.sh b/tests/KotlinTest.sh
index 709e68c..e41ce3a 100755
--- a/tests/KotlinTest.sh
+++ b/tests/KotlinTest.sh
@@ -40,7 +40,7 @@
 # Make jar
 jar cvf ${testdir}/kotlin_test.jar -C $targetdir . > /dev/null
 # Run test
-kotlin -cp ${testdir}/kotlin_test.jar KotlinTest
+kotlin -J"-ea" -cp ${testdir}/kotlin_test.jar KotlinTest
 # clean up
 rm -rf $targetdir
 rm ${testdir}/kotlin_test.jar