diff --git a/tests/test.sh b/tests/test.sh
index e30d265..3ede3ed 100755
--- a/tests/test.sh
+++ b/tests/test.sh
@@ -5,7 +5,7 @@ set -e
 TEST_DIR=$(dirname $0)
 SRC_DIR=$TEST_DIR/../src
 
-TEST_SRC=$(fd '\.ethlang' $TEST_DIR)
+TEST_SRC=$(find $TEST_DIR -name '*.ethlang')
 
 count_total=0
 count_succeeded=0