diff --git a/src/algorithms/string/longest-common-substring/__test__/longestCommonSubstring.test.js b/src/algorithms/string/longest-common-substring/__test__/longestCommonSubstring.test.js
index 8c1cb20703..1994c742fc 100644
--- a/src/algorithms/string/longest-common-substring/__test__/longestCommonSubstring.test.js
+++ b/src/algorithms/string/longest-common-substring/__test__/longestCommonSubstring.test.js
@@ -2,6 +2,7 @@ import longestCommonSubstring from '../longestCommonSubstring';
 
 describe('longestCommonSubstring', () => {
   it('should find longest common substring between two strings', () => {
+    // testing variuos options
     expect(longestCommonSubstring('', '')).toBe('');
     expect(longestCommonSubstring('ABC', '')).toBe('');
     expect(longestCommonSubstring('', 'ABC')).toBe('');