diff --git a/sh/tests/master-the-ls_test.sh b/sh/tests/master-the-ls_test.sh
index 088cd52dc..2cc783adb 100755
--- a/sh/tests/master-the-ls_test.sh
+++ b/sh/tests/master-the-ls_test.sh
@@ -8,8 +8,8 @@ IFS='
 script_dirS=$(cd -P "$(dirname "$BASH_SOURCE")" &>/dev/null && pwd)
 
 challenge() {
-    submitted=$(cd "$1" && bash "$script_dirS"/student/master-the-ls)
-    expected=$(cd "$1" && bash "$script_dirS"/solutions/master-the-ls)
+    submitted=$(cd "$1" && bash "$script_dirS"/student/master-the-ls.sh)
+    expected=$(cd "$1" && bash "$script_dirS"/solutions/master-the-ls.sh)
 
     diff <(echo "$submitted") <(echo "$expected")
 }
diff --git a/sh/tests/solutions/master-the-ls b/sh/tests/solutions/master-the-ls.sh
similarity index 100%
rename from sh/tests/solutions/master-the-ls
rename to sh/tests/solutions/master-the-ls.sh
diff --git a/subjects/devops/master-the-ls/README.md b/subjects/devops/master-the-ls/README.md
index 51f9c3bfb..3f7975238 100644
--- a/subjects/devops/master-the-ls/README.md
+++ b/subjects/devops/master-the-ls/README.md
@@ -2,7 +2,7 @@
 
 ### Instructions
 
-Put in a file `master-the-ls`, the command line that will:
+Create a script `master-the-ls`, that will do the following:
 
 - list the files and directories of the current directory.
 - Ignore the hidden files, the "." and the "..".