diff --git a/pyproject.toml b/pyproject.toml
index a37119a..aeb139c 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -41,7 +41,6 @@ dev = [
     "pytest",
     "pytest-cov",
     "flake8",
-    "pytest-flake8",
     "importlib-metadata",
 ]
 
diff --git a/src/fosslight_scanner/cli.py b/src/fosslight_scanner/cli.py
index b502e88..0e6feaf 100644
--- a/src/fosslight_scanner/cli.py
+++ b/src/fosslight_scanner/cli.py
@@ -78,7 +78,7 @@ def main():
                         type=str, dest='link', default="")
     parser.add_argument('--formats', '-f',
                         help='Scanner output file format (excel,yaml), Compare mode (excel,html,yaml,json)',
-                        type=str, dest='format',nargs='*', default=[])
+                        type=str, dest='format', nargs='*', default=[])
     parser.add_argument('--output', '-o', help='Output directory or file',
                         type=str, dest='output', default="")
     parser.add_argument('--dependency', '-d', help='Dependency arguments (e.g. -d "-m pip" )',
diff --git a/src/fosslight_scanner/common.py b/src/fosslight_scanner/common.py
index 511a48c..1daa1c0 100755
--- a/src/fosslight_scanner/common.py
+++ b/src/fosslight_scanner/common.py
@@ -112,7 +112,7 @@ def create_scancodejson(all_scan_item_origin, ui_mode_report, src_path=""):
         all_scan_item = copy.deepcopy(all_scan_item_origin)
         if all_scan_item.file_items:
             first_sheet = next((item for item in all_scan_item.file_items if item != FOSSLIGHT_DEPENDENCY),
-                                None)
+                               None)
         if not first_sheet:
             first_sheet = FOSSLIGHT_SOURCE
             all_scan_item.file_items[first_sheet] = []
diff --git a/src/fosslight_scanner/fosslight_scanner.py b/src/fosslight_scanner/fosslight_scanner.py
index a4ec1f7..04ed20c 100755
--- a/src/fosslight_scanner/fosslight_scanner.py
+++ b/src/fosslight_scanner/fosslight_scanner.py
@@ -116,7 +116,7 @@ def run_dependency(path_to_analyze, output_file_with_path, params="", path_to_ex
             pip_activate_cmd, pip_deactivate_cmd,
             output_custom_dir, app_name,
             github_token, formats, True, path_to_exclude=path_to_exclude,
-            graph_path="", graph_size=(600,600),
+            graph_path="", graph_size=(600, 600),
             recursive=recursive_dep,
             all_exclude_mode=all_exclude_mode
         )
@@ -160,7 +160,6 @@ def run_scanner(src_path, dep_arguments, output_path, keep_raw_data=False,
     if not remove_src_data:
         success, final_excel_dir, result_log = init(output_path)
 
-
     if not output_files:
         # If -o does not contains file name, set default name
         while len(output_files) < len(output_extensions):
@@ -363,7 +362,7 @@ def download_source(link, out_dir):
 
 
 def init(output_path="", make_outdir=True):
-    global _output_dir, _log_file, _start_time, logger
+    global _output_dir, _start_time, logger
 
     result_log = {}
     output_root_dir = ""
@@ -393,7 +392,7 @@ def run_main(mode_list, path_arg, dep_arguments, output_file_or_dir, file_format
              correct_mode=True, correct_fpath="", ui_mode=False, path_to_exclude=[],
              selected_source_scanner="all", source_write_json_file=False, source_print_matched_text=False,
              source_time_out=120, binary_simple=False, recursive_dep=False):
-    global _executed_path, _start_time
+    global _executed_path
 
     output_files = []
     default_oss_name = ""
@@ -438,7 +437,7 @@ def run_main(mode_list, path_arg, dep_arguments, output_file_or_dir, file_format
                 logger.warning(f"(-p option) Cannot analyze with multiple path: {path_arg}")
 
     success, msg, output_path, output_files, output_extensions, formats = check_output_formats_v2(output_file_or_dir, file_format,
-                                                                                       CUSTOMIZED_FORMAT)
+                                                                                                  CUSTOMIZED_FORMAT)
     if output_path == "":
         output_path = _executed_path
     else:
@@ -505,8 +504,8 @@ def run_main(mode_list, path_arg, dep_arguments, output_file_or_dir, file_format
                                                 output_extensions, num_cores, db_url,
                                                 default_oss_name, default_oss_version, url_to_analyze,
                                                 correct_mode, correct_fpath, ui_mode, path_to_exclude,
-                                                selected_source_scanner, source_write_json_file, source_print_matched_text, source_time_out,
-                                                binary_simple, formats, recursive_dep)
+                                                selected_source_scanner, source_write_json_file, source_print_matched_text,
+                                                source_time_out, binary_simple, formats, recursive_dep)
 
                 if extract_folder:
                     shutil.rmtree(extract_folder)
diff --git a/tests/fixtures/scan_project/sample_code.py b/tests/fixtures/scan_project/sample_code.py
index b502e88..0e6feaf 100644
--- a/tests/fixtures/scan_project/sample_code.py
+++ b/tests/fixtures/scan_project/sample_code.py
@@ -78,7 +78,7 @@ def main():
                         type=str, dest='link', default="")
     parser.add_argument('--formats', '-f',
                         help='Scanner output file format (excel,yaml), Compare mode (excel,html,yaml,json)',
-                        type=str, dest='format',nargs='*', default=[])
+                        type=str, dest='format', nargs='*', default=[])
     parser.add_argument('--output', '-o', help='Output directory or file',
                         type=str, dest='output', default="")
     parser.add_argument('--dependency', '-d', help='Dependency arguments (e.g. -d "-m pip" )',
diff --git a/tox.ini b/tox.ini
index b38e672..b066436 100644
--- a/tox.ini
+++ b/tox.ini
@@ -32,7 +32,8 @@ commands =
 
 
 [testenv:release]
-changedir = {toxinidir}/tests
+changedir = {toxinidir}
 
 commands =
-    pytest -v --flake8
+    flake8
+    pytest