diff --git a/src/test/unit_tests/jest_tests/test_bucket_diff.test.js b/src/test/unit_tests/jest_tests/test_bucket_diff.test.js
index ddbf3e451f..ec90cdd5c5 100644
--- a/src/test/unit_tests/jest_tests/test_bucket_diff.test.js
+++ b/src/test/unit_tests/jest_tests/test_bucket_diff.test.js
@@ -1560,6 +1560,106 @@ describe('BucketDiff get_keys_diff', () => {
     });
 });
 
+describe('BucketDiff get_first_bucket_keys_del', () => {
+    let bucketDiff;
+    beforeEach(() => {
+        const s3_params = {
+            accessKeyId: 'YOUR_ACCESS_KEY_ID',
+            secretAccessKey: 'YOUR_SECRET_ACCESS_KEY'
+        };
+
+        bucketDiff = new BucketDiff({
+            first_bucket: 'first-bucket',
+            second_bucket: 'second-bucket',
+            version: true,
+            s3_params: s3_params,
+            for_replication: false
+        });
+        replication_utils.get_object_md = mock_fn2.mockReturnValueOnce('metadata').mockReturnValueOnce('metadata');
+    });
+
+    describe('get_first_bucket_keys_del returns delete keys identified in first bucket', () => {
+        it('should return empty list if no latest delete markers present for any key', async () => {
+            const first_bucket_contents_left = {
+                "1": [
+                    { ETag: 'etag1.5', Size: 89317, Key: '1', IsLatest: true, },
+                    { ETag: 'etag1.4', Size: 24599, Key: '1', IsLatest: false, },
+                    { ETag: 'etag1.3', Size: 89317, Key: '1', IsLatest: false, },
+                ],
+                "2": [
+                    { ETag: 'etag2.5', Size: 89317, Key: '2', IsLatest: true, },
+                    { ETag: 'etag2.5', Size: 89317, Key: '2', IsLatest: false, },
+                ],
+            };
+            const first_bucket_delete_markers = {};
+            const result = await bucketDiff.get_first_bucket_keys_del(first_bucket_contents_left, first_bucket_delete_markers);
+            expect(result).toEqual([]);
+        });
+
+        it('should return list of keys with latest delete markers', async () => {
+            const first_bucket_contents_left = {
+                "1": [
+                    { ETag: 'etag1.5', Size: 89317, Key: '1', IsLatest: false, },
+                    { ETag: 'etag1.4', Size: 24599, Key: '1', IsLatest: false, },
+                    { ETag: 'etag1.3', Size: 89317, Key: '1', IsLatest: false, },
+                ],
+                "2": [
+                    { ETag: 'etag2.5', Size: 89317, Key: '2', IsLatest: true, },
+                    { ETag: 'etag2.5', Size: 89317, Key: '2', IsLatest: false, },
+                ],
+            };
+            const first_bucket_delete_markers = {
+                "1": { Key: '1', IsLatest: true, }
+            };
+            const result = await bucketDiff.get_first_bucket_keys_del(first_bucket_contents_left, first_bucket_delete_markers);
+            expect(result).toEqual(['1']);
+        });
+    });
+
+});
+
+describe('BucketDiff get_keys_del', () => {
+    let bucketDiff;
+    beforeEach(() => {
+        const s3_params = {
+            accessKeyId: 'YOUR_ACCESS_KEY_ID',
+            secretAccessKey: 'YOUR_SECRET_ACCESS_KEY'
+        };
+
+        bucketDiff = new BucketDiff({
+            first_bucket: 'first-bucket',
+            second_bucket: 'second-bucket',
+            version: true,
+            s3_params: s3_params,
+            for_replication: false
+        });
+        replication_utils.get_object_md = mock_fn2.mockReturnValueOnce('metadata').mockReturnValueOnce('metadata');
+    });
+
+    describe('get_keys_del verify the delete keys in second bucket and return', () => {
+        it('should return empty list if latest delete markers are present', async () => {
+            const first_bucket_delete_keys = [ '1', '2' ];
+            const second_bucket_delete_markers = {
+                "1": { Key: '1', IsLatest: true, },
+                "2": { Key: '2', IsLatest: true, }
+            };
+            const result = await bucketDiff.get_keys_del(first_bucket_delete_keys, second_bucket_delete_markers);
+            expect(result).toEqual([]);
+        });
+
+        it('should return list of keys with no latest delete markers', async () => {
+            const first_bucket_delete_keys = [ '1', '2' ];
+            const second_bucket_delete_markers = {
+                "1": { Key: '1', IsLatest: false, },
+                "3": {Key: '3', IsLatest: true},
+            };
+            const result = await bucketDiff.get_keys_del(first_bucket_delete_keys, second_bucket_delete_markers);
+            expect(result).toEqual([ '1', '2' ]);
+        });
+    });
+
+});
+
 describe('BucketDiff get_buckets_diff', () => {
     let params;
     let bucketDiff;