diff --git a/test/py/tests/test_efi_secboot/conftest.py b/test/py/tests/test_efi_secboot/conftest.py
index 4073732da6..c0943b6250 100644
--- a/test/py/tests/test_efi_secboot/conftest.py
+++ b/test/py/tests/test_efi_secboot/conftest.py
@@ -78,21 +78,21 @@ def efi_boot_env(request, u_boot_config):
         # db1-update
         check_call('cd %s; %ssign-efi-sig-list -t "2020-04-06" -a -c KEK.crt -k KEK.key db db1.esl db1-update.auth'
                    % (mnt_point, EFITOOLS_PATH), shell=True)
-        ## dbx (TEST_dbx certificate)
+        # dbx (TEST_dbx certificate)
         check_call('cd %s; openssl req -x509 -sha256 -newkey rsa:2048 -subj /CN=TEST_dbx/ -keyout dbx.key -out dbx.crt -nodes -days 365'
                    % mnt_point, shell=True)
         check_call('cd %s; %scert-to-efi-sig-list -g %s dbx.crt dbx.esl; %ssign-efi-sig-list -t "2020-04-05" -c KEK.crt -k KEK.key dbx dbx.esl dbx.auth'
                    % (mnt_point, EFITOOLS_PATH, GUID, EFITOOLS_PATH),
                    shell=True)
-        ## dbx_hash (digest of TEST_db certificate)
+        # dbx_hash (digest of TEST_db certificate)
         check_call('cd %s; %scert-to-efi-hash-list -g %s -t 0 -s 256 db.crt dbx_hash.crl; %ssign-efi-sig-list -t "2020-04-05" -c KEK.crt -k KEK.key dbx dbx_hash.crl dbx_hash.auth'
                    % (mnt_point, EFITOOLS_PATH, GUID, EFITOOLS_PATH),
                    shell=True)
-        ## dbx_hash1 (digest of TEST_db1 certificate)
+        # dbx_hash1 (digest of TEST_db1 certificate)
         check_call('cd %s; %scert-to-efi-hash-list -g %s -t 0 -s 256 db1.crt dbx_hash1.crl; %ssign-efi-sig-list -t "2020-04-05" -c KEK.crt -k KEK.key dbx dbx_hash1.crl dbx_hash1.auth'
                    % (mnt_point, EFITOOLS_PATH, GUID, EFITOOLS_PATH),
                    shell=True)
-        ## dbx_db (with TEST_db certificate)
+        # dbx_db (with TEST_db certificate)
         check_call('cd %s; %ssign-efi-sig-list -t "2020-04-05" -c KEK.crt -k KEK.key dbx db.esl dbx_db.auth'
                    % (mnt_point, EFITOOLS_PATH),
                    shell=True)
@@ -103,10 +103,10 @@ def efi_boot_env(request, u_boot_config):
         # Sign image
         check_call('cd %s; sbsign --key db.key --cert db.crt helloworld.efi'
                    % mnt_point, shell=True)
-        ## Sign already-signed image with another key
+        # Sign already-signed image with another key
         check_call('cd %s; sbsign --key db1.key --cert db1.crt --output helloworld.efi.signed_2sigs helloworld.efi.signed'
                    % mnt_point, shell=True)
-        ## Digest image
+        # Digest image
         check_call('cd %s; %shash-to-efi-sig-list helloworld.efi db_hello.hash; %ssign-efi-sig-list -t "2020-04-07" -c KEK.crt -k KEK.key db db_hello.hash db_hello.auth'
                    % (mnt_point, EFITOOLS_PATH, EFITOOLS_PATH),
                    shell=True)
@@ -117,7 +117,8 @@ def efi_boot_env(request, u_boot_config):
                    % (mnt_point, EFITOOLS_PATH),
                    shell=True)
 
-        check_call('virt-make-fs --partition=gpt --size=+1M --type=vfat {} {}'.format(mnt_point, image_path), shell=True)
+        check_call('virt-make-fs --partition=gpt --size=+1M --type=vfat {} {}'.format(
+            mnt_point, image_path), shell=True)
         check_call('rm -rf {}'.format(mnt_point), shell=True)
 
     except CalledProcessError as exception: