diff --git a/sh/tests/head-and-tail_test.sh b/sh/tests/head-and-tail_test.sh
old mode 100644
new mode 100755
diff --git a/sh/tests/solutions/head-and-tail.sh b/sh/tests/solutions/head-and-tail.sh
index fdd1575f..683ee97a 100755
--- a/sh/tests/solutions/head-and-tail.sh
+++ b/sh/tests/solutions/head-and-tail.sh
@@ -1 +1,3 @@
+#!/usr/bin/env bash
+
 curl --silent https://assets.01-edu.org/devops-branch/HeadTail.txt | head -1 && curl --silent https://assets.01-edu.org/devops-branch/HeadTail.txt | tail -1
\ No newline at end of file