diff --git a/ci/workflows/main-cron.yml b/ci/workflows/main-cron.yml
index d1086092f7e2..43ab9dca535d 100644
--- a/ci/workflows/main-cron.yml
+++ b/ci/workflows/main-cron.yml
@@ -528,9 +528,9 @@ steps:
     timeout_in_minutes: 25
     retry: *auto-retry
 
-  - label: "S3 source and sink on parquet file"
-    key: "s3-source-and-sink-parquet-encode"
-    command: "ci/scripts/s3-source-test.sh -p ci-release -s fs_parquet_source_and_sink.py"
+  - label: "S3 sink on parquet and json file"
+    key: "s3-sink-parquet-and-json-encode"
+    command: "ci/scripts/s3-source-test.sh -p ci-release -s fs_sink.py"
     if: |
       !(build.pull_request.labels includes "ci/main-cron/run-selected") && build.env("CI_STEPS") == null
       || build.pull_request.labels includes "ci/run-s3-source-tests"
diff --git a/e2e_test/s3/fs_parquet_source_and_sink.py b/e2e_test/s3/fs_sink.py
similarity index 71%
rename from e2e_test/s3/fs_parquet_source_and_sink.py
rename to e2e_test/s3/fs_sink.py
index 1bf7de6ad6ec..344b1b807d7e 100644
--- a/e2e_test/s3/fs_parquet_source_and_sink.py
+++ b/e2e_test/s3/fs_sink.py
@@ -116,7 +116,7 @@ def _table():
         return 's3_test_parquet'
 
     # Execute a SELECT statement
-    cur.execute(f'''CREATE sink test_file_sink as select
+    cur.execute(f'''CREATE sink test_file_sink_parquet as select
         id,
         name,
         sex,
@@ -138,15 +138,15 @@ def _table():
         s3.credentials.access = 'hummockadmin',
         s3.credentials.secret = 'hummockadmin',
         s3.endpoint_url = 'http://hummock001.127.0.0.1:9301',
-        s3.path = '',
+        s3.path = 'test_parquet_sink/',
         s3.file_type = 'parquet',
         type = 'append-only',
         force_append_only='true'
     ) FORMAT PLAIN ENCODE PARQUET(force_append_only='true');''')
 
-    print('Sink into s3...')
+    print('Sink into s3 in parquet encode...')
     # Execute a SELECT statement
-    cur.execute(f'''CREATE TABLE test_sink_table(
+    cur.execute(f'''CREATE TABLE test_parquet_sink_table(
         id bigint primary key,
         name TEXT,
         sex bigint,
@@ -162,7 +162,7 @@ def _table():
         test_timestamptz timestamptz,
     ) WITH (
         connector = 's3',
-        match_pattern = '*.parquet',
+        match_pattern = 'test_parquet_sink/*.parquet',
         s3.region_name = 'custom',
         s3.bucket_name = 'hummock001',
         s3.credentials.access = 'hummockadmin',
@@ -173,14 +173,82 @@ def _table():
     total_rows = file_num * item_num_per_file
     MAX_RETRIES = 40
     for retry_no in range(MAX_RETRIES):
-        cur.execute(f'select count(*) from test_sink_table')
+        cur.execute(f'select count(*) from test_parquet_sink_table')
+        result = cur.fetchone()
+        if result[0] == total_rows:
+            break
+        print(f"[retry {retry_no}] Now got {result[0]} rows in table, {total_rows} expected, wait 10s")
+        sleep(10)
+
+    stmt = f'select count(*), sum(id) from test_parquet_sink_table'
+    print(f'Execute reading sink files: {stmt}')
+
+    # Execute a SELECT statement
+    cur.execute(f'''CREATE sink test_file_sink_json as select
+        id,
+        name,
+        sex,
+        mark,
+        test_int,
+        test_real,
+        test_double_precision,
+        test_varchar,
+        test_bytea,
+        test_date,
+        test_time,
+        test_timestamp,
+        test_timestamptz
+        from {_table()} WITH (
+        connector = 's3',
+        match_pattern = '*.parquet',
+        s3.region_name = 'custom',
+        s3.bucket_name = 'hummock001',
+        s3.credentials.access = 'hummockadmin',
+        s3.credentials.secret = 'hummockadmin',
+        s3.endpoint_url = 'http://hummock001.127.0.0.1:9301',
+        s3.path = 'test_json_sink/',
+        s3.file_type = 'json',
+        type = 'append-only',
+        force_append_only='true'
+    ) FORMAT PLAIN ENCODE JSON(force_append_only='true');''')
+
+    print('Sink into s3 in json encode...')
+    # Execute a SELECT statement
+    cur.execute(f'''CREATE TABLE test_json_sink_table(
+        id bigint primary key,
+        name TEXT,
+        sex bigint,
+        mark bigint,
+        test_int int,
+        test_real real,
+        test_double_precision double precision,
+        test_varchar varchar,
+        test_bytea bytea,
+        test_date date,
+        test_time time,
+        test_timestamp timestamp,
+        test_timestamptz timestamptz,
+    ) WITH (
+        connector = 's3',
+        match_pattern = 'test_json_sink/*.json',
+        s3.region_name = 'custom',
+        s3.bucket_name = 'hummock001',
+        s3.credentials.access = 'hummockadmin',
+        s3.credentials.secret = 'hummockadmin',
+        s3.endpoint_url = 'http://hummock001.127.0.0.1:9301',
+    ) FORMAT PLAIN ENCODE JSON;''')
+
+    total_rows = file_num * item_num_per_file
+    MAX_RETRIES = 40
+    for retry_no in range(MAX_RETRIES):
+        cur.execute(f'select count(*) from test_json_sink_table')
         result = cur.fetchone()
         if result[0] == total_rows:
             break
         print(f"[retry {retry_no}] Now got {result[0]} rows in table, {total_rows} expected, wait 10s")
         sleep(10)
 
-    stmt = f'select count(*), sum(id) from test_sink_table'
+    stmt = f'select count(*), sum(id) from test_json_sink_table'
     print(f'Execute reading sink files: {stmt}')
     cur.execute(stmt)
     result = cur.fetchone()
@@ -194,8 +262,10 @@ def _assert_eq(field, got, expect):
     _assert_eq('sum(id)', result[1], (total_rows - 1) * total_rows / 2)
 
     print('File sink test pass!')
-    cur.execute(f'drop sink test_file_sink')
-    cur.execute(f'drop table test_sink_table')
+    cur.execute(f'drop sink test_file_sink_parquet')
+    cur.execute(f'drop table test_parquet_sink_table')
+    cur.execute(f'drop sink test_file_sink_json')
+    cur.execute(f'drop table test_json_sink_table')
     cur.close()
     conn.close()