diff --git a/requirements-dev.txt b/requirements-dev.txt
index 5d3baed..6bf06d2 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -3,4 +3,5 @@ tox
 pytest
 pytest-cov
 pytest-flake8
+pytest-xdist
 flake8==3.9.2
\ No newline at end of file
diff --git a/tests/file_format_test.py b/tests/file_format_test.py
new file mode 100644
index 0000000..d03816d
--- /dev/null
+++ b/tests/file_format_test.py
@@ -0,0 +1,54 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+# Copyright (c) 2020 LG Electronics Inc.
+# SPDX-License-Identifier: Apache-2.0
+
+import os
+import subprocess
+import shutil
+import pytest
+import tempfile
+
+
+@pytest.fixture(scope="function", autouse=True)
+def setup_test_result_dir_and_teardown():
+    # 각 테스트마다 임시 디렉토리 생성
+    test_result_dir = tempfile.mkdtemp(dir=".")  # 고유한 임시 디렉토리 생성
+    print("==============setup: {test_result_dir}==============")
+
+    yield test_result_dir  # 임시 디렉토리 경로를 테스트 함수로 넘김
+
+    print("==============tearDown==============")
+    shutil.rmtree(test_result_dir)
+
+
+def run_command(*args):  # 리눅스 명령어 실행
+    result = subprocess.run(args, capture_output=True, text=True)
+    success = result.returncode == 0
+    output = result.stdout if success else result.stderr
+    return success, output
+
+
+@pytest.mark.parametrize("file_format, extension", [
+    ("excel", ".xlsx"),
+    ("csv", ".csv"),
+    ("opossum", ".json"),
+    ("yaml", [".yaml", ".yml"])
+])
+def test_output_file_format(file_format, extension, setup_test_result_dir_and_teardown):  # 테스트 환경 tox.ini
+    # Given
+    test_result_dir = setup_test_result_dir_and_teardown
+
+    # When
+    success, _ = run_command("fosslight_bin", "-p", ".", "-o", test_result_dir, "-f", file_format)
+    files_in_result = os.listdir(test_result_dir)
+
+    # Then
+    if isinstance(extension, list):
+        # 생성된 파일 명칭을 리스트로 갖고오는 로직
+        matching_files = [f for f in files_in_result if any(f.endswith(ext) for ext in extension)]
+    else:
+        matching_files = [f for f in files_in_result if f.endswith(extension)]
+
+    assert success is True, f"Test Output File : {file_format} files not properly created (not create)"
+    assert len(matching_files) > 0, f"Test Output File : {file_format} files not properly created (length)"
diff --git a/tests/initial_tox_test.py b/tests/initial_tox_test.py
new file mode 100644
index 0000000..24c61c9
--- /dev/null
+++ b/tests/initial_tox_test.py
@@ -0,0 +1,77 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+# Copyright (c) 2020 LG Electronics Inc.
+# SPDX-License-Identifier: Apache-2.0
+
+import os
+import subprocess
+import shutil
+import pytest
+
+TEST_RESULT_DIR = "test_result"  # 테스트 디렉토리 명
+
+
+@pytest.fixture(scope="function", autouse=True)  # 테스트 디렉토리 생성/삭제 로직
+def setup_test_result_dir_and_teardown():
+    print("==============setup==============")
+    os.makedirs(TEST_RESULT_DIR, exist_ok=True)
+
+    yield
+
+    print("==============tearDown==============")
+    shutil.rmtree(TEST_RESULT_DIR)
+
+
+def run_command(*args):  # 리눅스 명령어 실행
+    result = subprocess.run(args, capture_output=True, text=True)
+    success = result.returncode == 0
+    output = result.stdout if success else result.stderr
+    return success, output
+
+
+def test_test_run_environment():  # 테스트 환경 tox.ini
+    # When
+    csv_success, _ = run_command("fosslight_bin", "-p", ".", "-o", "test_result", "-f", "csv")
+    exclude_success, _ = run_command(
+        "fosslight_bin",
+        "-p", ".",
+        "-e", "test", "commons-logging-1.2.jar",
+        "-o", "test_result/exclude_result.csv",
+        "-f", "csv"
+    )
+
+    files_in_result = run_command("ls", "test_result")[1].split()
+    txt_success, txt_output = run_command("find", "test_result", "-type", "f", "-name", "fosslight_log*.txt")
+
+    # Then
+    csv_files = [f for f in files_in_result if f.endswith('.csv')]
+    txt_files = txt_output.split()
+    assert csv_success is True, "Test Run Environment: CSV files not properly created (not create)"
+    assert len(csv_files) > 0, "Test Run Environment: CSV files not properly created (length)"
+    assert exclude_success is True, "Test Run Environment: Exclude feature fail"
+    assert len(txt_files) > 0, "Test Run Environment: txt files not properly created"
+
+
+def test_release_environment():  # 릴리즈 환경 tox.ini
+    # When
+    help_success, _ = run_command("fosslight_bin", "-h")
+    csv_success, _ = run_command("fosslight_bin", "-p", ".", "-o", "test_result/result.csv", "-f", "csv")
+    exclude_csv_success, _ = run_command(
+        "fosslight_bin",
+        "-p", ".",
+        "-e", "test", "commons-logging-1.2.jar",
+        "-o", "test_result/exclude_result.csv",
+        "-f", "csv"
+    )
+
+    json_success, _ = run_command("fosslight_bin", "-p", ".", "-o", "test_result/result.json", "-f", "opossum")
+    files_in_result = run_command("ls", "test_result")[1].split()
+
+    # Then
+    required_files = ['result.csv', 'exclude_result.csv', 'result.json']
+    files_exist = all(f in files_in_result for f in required_files)
+    assert help_success is True, "Release Run Environment: help method not properly processing"
+    assert csv_success is True, "Release Run Environment: CSV files not properly created"
+    assert exclude_csv_success is True, "Release Run Environment: Exclude feature fail"
+    assert json_success is True, "Release Run Environment: json files not properly created"
+    assert files_exist is True, "Release Run Environment: Required files not properly created"
diff --git a/tox.ini b/tox.ini
index 7f15234..1c4f0ca 100644
--- a/tox.ini
+++ b/tox.ini
@@ -24,28 +24,25 @@ ignore = E722, W503
 filterwarnings = ignore::DeprecationWarning
 
 [testenv:test_run]
+deps =
+  -r{toxinidir}/requirements-dev.txt
+changedir = tests
 commands =
-  rm -rf test_result
-  fosslight_bin -p tests -o test_result -f csv
-  fosslight_bin -p tests -e test commons-logging-1.2.jar -o test_result/exclude_result.csv -f csv
-  ls test_result/
-  bash -c 'find test_result -type f -name "fosslight_report*.csv" | xargs cat'
-  bash -c 'find test_result -type f -name "fosslight_binary*.txt" | xargs cat'
+  pytest -n 4 initial_tox_test.py::test_test_run_environment
 
-[testenv:release]
+[testenv:format_test]
 deps =
   -r{toxinidir}/requirements-dev.txt
+changedir = tests
+commands =
+  pytest -n 4 file_format_test.py::test_output_file_format
 
+[testenv:release]
+deps =
+  -r{toxinidir}/requirements-dev.txt
 commands =
-  fosslight_bin -h
-  fosslight_bin -p tests -o test_result/result.csv -f csv
-  fosslight_bin -p tests -e test commons-logging-1.2.jar -o test_result/exclude_result.csv -f csv
-  ls test_result/
-  cat test_result/result.csv
-  cat test_result/exclude_result.csv
-  fosslight_bin -p tests -o test_result/result.json -f opossum
+  pytest -n 4 tests/initial_tox_test.py::test_release_environment
   pytest -v --flake8
   pyinstaller --onefile cli.py -n cli --additional-hooks-dir=hooks --hidden-import=pkg_resources.extern
   {toxinidir}/dist/cli -p tests -o test_result_cli
   ; py.test --cov-report term-missing --cov={envsitepackagesdir}/fosslight_binary
- 
\ No newline at end of file