diff --git a/unitests.sh b/unitests.sh
index dd0bbda..a1b40f9 100644
--- a/unitests.sh
+++ b/unitests.sh
@@ -33,6 +33,7 @@ MINISHELL="../minishell"
 	LINE_NUMBER=0
 	OPTION=0
 	PRINT=0
+	FILES_BEFORE="$(ls .)"
 	mkdir -p ./logs
 	echo "" > ./logs/bash_log.txt
 	echo "" > ./logs/minishell_log.txt
@@ -89,6 +90,17 @@ MINISHELL="../minishell"
 		echo ""
 	}
 
+# to delete the files created during the script
+	function delete_files
+	{
+		FILES_AFTER="$(ls .)"
+		DIFF_FILES="$(comm -3 <(echo "$FILES_BEFORE") <(echo "$FILES_AFTER"))"
+		while read line_diff
+		do
+			rm -r "$line_diff"
+		done < <(echo "$DIFF_FILES")
+	}
+
 # check for arguments, like options or files list
 # if no file in arguments, default file list is used
 	list_files="$default_files"
@@ -98,7 +110,8 @@ MINISHELL="../minishell"
 		if [ "$1" == "help" ]
 		then
 			print_usage
-			START=0
+			delete_files
+			exit 0
 		elif [ "$1" == "-p1" ]
 		then
 			PRINT=1
@@ -272,8 +285,9 @@ MINISHELL="../minishell"
 	fi
 
 # ask to show the diff
-	read -p 'you want to see the diff ? (y?)' DIFF
-	if [[ "${DIFF,,}" =~ y|yes ]]
+# -rsn1 will stop read after first key pressed
+	read -rsn1 -p 'if you want to see the diff, press "y"' DIFF
+	if [[ "${DIFF,,}" == y ]]
 	then
 		diff -y --width=100 --color=always "$BASH_LOG" "$MINISHELL_LOG"
 	fi