diff --git a/requirements.txt b/requirements.txt
index e6a3080..3186069 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,3 +1,5 @@
+tox
+pytest
 future
 pandas
 openpyxl
diff --git a/tox.ini b/tox.ini
index 9096e16..bf08078 100644
--- a/tox.ini
+++ b/tox.ini
@@ -14,32 +14,24 @@ allowlist_externals = cat
 
 setenv =
   ; TYPECODE_LIBMAGIC_DB_PATH = /usr/share/file/magic.mgc
-  PYTHONPATH=.
+  PYTHONPATH={toxinidir}
 
 [flake8]
 max-line-length = 130
 exclude = .tox/*
 
 [pytest]
-filterwarnings = ignore::DeprecationWarning
+testpaths = tests
 norecursedirs = test_result_*
+filterwarnings = ignore::DeprecationWarning
 
 [testenv:test_run]
 deps =
   -r{toxinidir}/requirements.txt
 
-changedir = {tox_root}/tests
+changedir = {toxinidir}/tests
 
 commands =
-    ; rm -rf test_result_local_path
-    ; rm -rf test_result_exclude_path
-    ; rm -rf test_result_wget
-    ; fosslight -o test_result_local_path/test.xlsx -p tests -r
-    ; fosslight binary source -o test_result_multi_mode/test.xlsx -p tests -r
-    ; fosslight -o test_result_exclude_path/test.xlsx -p tests -e test sample_license.txt
-    ; fosslight dependency -o test_result_wget -w "https://github.com/LGE-OSS/example.git"
-    ; fosslight source -s tests/setting.json
-    ; ls test_result_wget
     pytest
 
 
@@ -47,15 +39,7 @@ commands =
 deps =
   -r{toxinidir}/requirements-dev.txt
 
-changedir = {tox_root}/tests
+changedir = {toxinidir}/tests
 
 commands =
-    ; fosslight -h
-    ; fosslight all -o test_result_local_path/test.xlsx -p tests -r
-    ; fosslight binary dependency -o test_result_multi_mode/test.xlsx -p tests -r
-    ; fosslight -o test_result_exclude_path/test.xlsx -p tests -e test sample_license.txt
-    ; fosslight source -o test_result_wget -w "https://github.com/LGE-OSS/example.git"
-    ; fosslight binary -s tests/setting.json
-    pytest
-    
     pytest -v --flake8