diff --git a/test/py/tests/test_efi_secboot/test_authvar.py b/test/py/tests/test_efi_secboot/test_authvar.py
index 55dcaa95f1ea..766ed9283605 100644
--- a/test/py/tests/test_efi_secboot/test_authvar.py
+++ b/test/py/tests/test_efi_secboot/test_authvar.py
@@ -9,7 +9,6 @@ This test verifies variable authentication
 """
 
 import pytest
-import re
 from defs import *
 
 @pytest.mark.boardspec('sandbox')
@@ -40,7 +39,7 @@ class TestEfiAuthVar(object):
             output = u_boot_console.run_command_list([
                 'fatload host 0:1 4000000 PK.auth',
                 'setenv -e -nv -bs -rt -i 4000000,$filesize PK'])
-            assert(re.search('Failed to set EFI variable', ''.join(output)))
+            assert('Failed to set EFI variable' in ''.join(output))
 
         with u_boot_console.log.section('Test Case 1c'):
             # Test Case 1c, install PK
@@ -48,7 +47,7 @@ class TestEfiAuthVar(object):
                 'fatload host 0:1 4000000 PK.auth',
                 'setenv -e -nv -bs -rt -at -i 4000000,$filesize PK',
                 'printenv -e -n PK'])
-            assert(re.search('PK:', ''.join(output)))
+            assert('PK:' in ''.join(output))
 
             output = u_boot_console.run_command(
                 'printenv -e SecureBoot')
@@ -62,25 +61,25 @@ class TestEfiAuthVar(object):
             output = u_boot_console.run_command_list([
                 'fatload host 0:1 4000000 db.auth',
                 'setenv -e -nv -bs -rt -at -i 4000000,$filesize db'])
-            assert(re.search('Failed to set EFI variable', ''.join(output)))
+            assert('Failed to set EFI variable' in ''.join(output))
 
             output = u_boot_console.run_command_list([
                 'fatload host 0:1 4000000 db.auth',
                 'setenv -e -nv -bs -rt -at -i 4000000,$filesize dbx'])
-            assert(re.search('Failed to set EFI variable', ''.join(output)))
+            assert('Failed to set EFI variable' in ''.join(output))
 
         with u_boot_console.log.section('Test Case 1e'):
             # Test Case 1e, install KEK
             output = u_boot_console.run_command_list([
                 'fatload host 0:1 4000000 KEK.auth',
                 'setenv -e -nv -bs -rt -i 4000000,$filesize KEK'])
-            assert(re.search('Failed to set EFI variable', ''.join(output)))
+            assert('Failed to set EFI variable' in ''.join(output))
 
             output = u_boot_console.run_command_list([
                 'fatload host 0:1 4000000 KEK.auth',
                 'setenv -e -nv -bs -rt -at -i 4000000,$filesize KEK',
                 'printenv -e -n KEK'])
-            assert(re.search('KEK:', ''.join(output)))
+            assert('KEK:' in ''.join(output))
 
             output = u_boot_console.run_command(
                 'printenv -e SecureBoot')
@@ -91,14 +90,14 @@ class TestEfiAuthVar(object):
             output = u_boot_console.run_command_list([
                 'fatload host 0:1 4000000 db.auth',
                 'setenv -e -nv -bs -rt -i 4000000,$filesize db'])
-            assert(re.search('Failed to set EFI variable', ''.join(output)))
+            assert('Failed to set EFI variable' in ''.join(output))
 
             output = u_boot_console.run_command_list([
                 'fatload host 0:1 4000000 db.auth',
                 'setenv -e -nv -bs -rt -at -i 4000000,$filesize db',
                 'printenv -e -n -guid d719b2cb-3d3a-4596-a3bc-dad00e67656f db'])
-            assert(not re.search('Failed to set EFI variable', ''.join(output)))
-            assert(re.search('db:', ''.join(output)))
+            assert(not 'Failed to set EFI variable' in ''.join(output))
+            assert('db:' in ''.join(output))
 
             output = u_boot_console.run_command(
                 'printenv -e SecureBoot')
@@ -109,14 +108,14 @@ class TestEfiAuthVar(object):
             output = u_boot_console.run_command_list([
                 'fatload host 0:1 4000000 db.auth',
                 'setenv -e -nv -bs -rt -i 4000000,$filesize db'])
-            assert(re.search('Failed to set EFI variable', ''.join(output)))
+            assert('Failed to set EFI variable' in ''.join(output))
 
             output = u_boot_console.run_command_list([
                 'fatload host 0:1 4000000 db.auth',
                 'setenv -e -nv -bs -rt -at -i 4000000,$filesize db',
                 'printenv -e -n -guid d719b2cb-3d3a-4596-a3bc-dad00e67656f db'])
-            assert(not re.search('Failed to set EFI variable', ''.join(output)))
-            assert(re.search('db:', ''.join(output)))
+            assert(not 'Failed to set EFI variable' in ''.join(output))
+            assert('db:' in ''.join(output))
 
             output = u_boot_console.run_command(
                 'printenv -e SecureBoot')
@@ -139,20 +138,20 @@ class TestEfiAuthVar(object):
                 'fatload host 0:1 4000000 db.auth',
                 'setenv -e -nv -bs -rt -at -i 4000000,$filesize db',
                 'printenv -e -n -guid d719b2cb-3d3a-4596-a3bc-dad00e67656f db'])
-            assert(not re.search('Failed to set EFI variable', ''.join(output)))
-            assert(re.search('db:', ''.join(output)))
+            assert(not 'Failed to set EFI variable' in ''.join(output))
+            assert('db:' in ''.join(output))
 
             output = u_boot_console.run_command_list([
                 'fatload host 0:1 4000000 db1.auth',
                 'setenv -e -nv -bs -rt -i 4000000,$filesize db'])
-            assert(re.search('Failed to set EFI variable', ''.join(output)))
+            assert('Failed to set EFI variable' in ''.join(output))
 
         with u_boot_console.log.section('Test Case 2b'):
             # Test Case 2b, update without correct signature
             output = u_boot_console.run_command_list([
                 'fatload host 0:1 4000000 db.esl',
                 'setenv -e -nv -bs -rt -at -i 4000000,$filesize db'])
-            assert(re.search('Failed to set EFI variable', ''.join(output)))
+            assert('Failed to set EFI variable' in ''.join(output))
 
         with u_boot_console.log.section('Test Case 2c'):
             # Test Case 2c, update with correct signature
@@ -160,8 +159,8 @@ class TestEfiAuthVar(object):
                 'fatload host 0:1 4000000 db1.auth',
                 'setenv -e -nv -bs -rt -at -i 4000000,$filesize db',
                 'printenv -e -n -guid d719b2cb-3d3a-4596-a3bc-dad00e67656f db'])
-            assert(not re.search('Failed to set EFI variable', ''.join(output)))
-            assert(re.search('db:', ''.join(output)))
+            assert(not 'Failed to set EFI variable' in ''.join(output))
+            assert('db:' in ''.join(output))
 
     def test_efi_var_auth3(self, u_boot_console, efi_boot_env):
         """
@@ -180,20 +179,20 @@ class TestEfiAuthVar(object):
                 'fatload host 0:1 4000000 db.auth',
                 'setenv -e -nv -bs -rt -at -i 4000000,$filesize db',
                 'printenv -e -n -guid d719b2cb-3d3a-4596-a3bc-dad00e67656f db'])
-            assert(not re.search('Failed to set EFI variable', ''.join(output)))
-            assert(re.search('db:', ''.join(output)))
+            assert(not 'Failed to set EFI variable' in ''.join(output))
+            assert('db:' in ''.join(output))
 
             output = u_boot_console.run_command_list([
                 'fatload host 0:1 4000000 db1.auth',
                 'setenv -e -nv -bs -rt -a -i 4000000,$filesize db'])
-            assert(re.search('Failed to set EFI variable', ''.join(output)))
+            assert('Failed to set EFI variable' in ''.join(output))
 
         with u_boot_console.log.section('Test Case 3b'):
             # Test Case 3b, update without correct signature
             output = u_boot_console.run_command_list([
                 'fatload host 0:1 4000000 db.esl',
                 'setenv -e -nv -bs -rt -at -a -i 4000000,$filesize db'])
-            assert(re.search('Failed to set EFI variable', ''.join(output)))
+            assert('Failed to set EFI variable' in ''.join(output))
 
         with u_boot_console.log.section('Test Case 3c'):
             # Test Case 3c, update with correct signature
@@ -201,8 +200,8 @@ class TestEfiAuthVar(object):
                 'fatload host 0:1 4000000 db1.auth',
                 'setenv -e -nv -bs -rt -at -a -i 4000000,$filesize db',
                 'printenv -e -n -guid d719b2cb-3d3a-4596-a3bc-dad00e67656f db'])
-            assert(not re.search('Failed to set EFI variable', ''.join(output)))
-            assert(re.search('db:', ''.join(output)))
+            assert(not 'Failed to set EFI variable' in ''.join(output))
+            assert('db:' in ''.join(output))
 
     def test_efi_var_auth4(self, u_boot_console, efi_boot_env):
         """
@@ -221,22 +220,22 @@ class TestEfiAuthVar(object):
                 'fatload host 0:1 4000000 db.auth',
                 'setenv -e -nv -bs -rt -at -i 4000000,$filesize db',
                 'printenv -e -n -guid d719b2cb-3d3a-4596-a3bc-dad00e67656f db'])
-            assert(not re.search('Failed to set EFI variable', ''.join(output)))
-            assert(re.search('db:', ''.join(output)))
+            assert(not 'Failed to set EFI variable' in ''.join(output))
+            assert('db:' in ''.join(output))
 
             output = u_boot_console.run_command_list([
                 'setenv -e -nv -bs -rt db',
                 'printenv -e -n -guid d719b2cb-3d3a-4596-a3bc-dad00e67656f db'])
-            assert(re.search('Failed to set EFI variable', ''.join(output)))
-            assert(re.search('db:', ''.join(output)))
+            assert('Failed to set EFI variable' in ''.join(output))
+            assert('db:' in ''.join(output))
 
         with u_boot_console.log.section('Test Case 4b'):
             # Test Case 4b, update without correct signature/data
             output = u_boot_console.run_command_list([
                 'setenv -e -nv -bs -rt -at db',
                 'printenv -e -n -guid d719b2cb-3d3a-4596-a3bc-dad00e67656f db'])
-            assert(re.search('Failed to set EFI variable', ''.join(output)))
-            assert(re.search('db:', ''.join(output)))
+            assert('Failed to set EFI variable' in ''.join(output))
+            assert('db:' in ''.join(output))
 
     def test_efi_var_auth5(self, u_boot_console, efi_boot_env):
         """
@@ -255,15 +254,15 @@ class TestEfiAuthVar(object):
                 'fatload host 0:1 4000000 db.auth',
                 'setenv -e -nv -bs -rt -at -i 4000000,$filesize db',
                 'printenv -e -n PK'])
-            assert(not re.search('Failed to set EFI variable', ''.join(output)))
-            assert(re.search('PK:', ''.join(output)))
+            assert(not 'Failed to set EFI variable' in ''.join(output))
+            assert('PK:' in ''.join(output))
 
             output = u_boot_console.run_command_list([
                 'fatload host 0:1 4000000 PK_null.esl',
                 'setenv -e -nv -bs -rt -at -i 4000000,$filesize PK',
                 'printenv -e -n PK'])
-            assert(re.search('Failed to set EFI variable', ''.join(output)))
-            assert(re.search('PK:', ''.join(output)))
+            assert('Failed to set EFI variable' in ''.join(output))
+            assert('PK:' in ''.join(output))
 
         with u_boot_console.log.section('Test Case 5b'):
             # Test Case 5b, Uninstall PK with correct signature
@@ -271,8 +270,8 @@ class TestEfiAuthVar(object):
                 'fatload host 0:1 4000000 PK_null.auth',
                 'setenv -e -nv -bs -rt -at -i 4000000,$filesize PK',
                 'printenv -e -n PK'])
-            assert(not re.search('Failed to set EFI variable', ''.join(output)))
-            assert(re.search('\"PK\" not defined', ''.join(output)))
+            assert(not 'Failed to set EFI variable' in ''.join(output))
+            assert('\"PK\" not defined' in ''.join(output))
 
             output = u_boot_console.run_command(
                 'printenv -e SecureBoot')
diff --git a/test/py/tests/test_efi_secboot/test_signed.py b/test/py/tests/test_efi_secboot/test_signed.py
index 584282b338bc..19d78b1b64e0 100644
--- a/test/py/tests/test_efi_secboot/test_signed.py
+++ b/test/py/tests/test_efi_secboot/test_signed.py
@@ -9,7 +9,6 @@ This test verifies image authentication for signed images.
 """
 
 import pytest
-import re
 from defs import *
 
 @pytest.mark.boardspec('sandbox')
@@ -32,7 +31,7 @@ class TestEfiSignedImage(object):
                 'efidebug boot add 1 HELLO1 host 0:1 /helloworld.efi.signed ""',
                 'efidebug boot next 1',
                 'bootefi bootmgr'])
-            assert(re.search('Hello, world!', ''.join(output)))
+            assert('Hello, world!' in ''.join(output))
 
         with u_boot_console.log.section('Test Case 1b'):
             # Test Case 1b, run unsigned image if no db/dbx
@@ -40,7 +39,7 @@ class TestEfiSignedImage(object):
                 'efidebug boot add 2 HELLO2 host 0:1 /helloworld.efi ""',
                 'efidebug boot next 2',
                 'bootefi bootmgr'])
-            assert(re.search('Hello, world!', ''.join(output)))
+            assert('Hello, world!' in ''.join(output))
 
         with u_boot_console.log.section('Test Case 1c'):
             # Test Case 1c, not authenticated by db
@@ -51,24 +50,23 @@ class TestEfiSignedImage(object):
                 'setenv -e -nv -bs -rt -at -i 4000000,$filesize KEK',
                 'fatload host 0:1 4000000 PK.auth',
                 'setenv -e -nv -bs -rt -at -i 4000000,$filesize PK'])
-            assert(not re.search('Failed to set EFI variable', ''.join(output)))
+            assert(not 'Failed to set EFI variable' in ''.join(output))
             output = u_boot_console.run_command_list([
                 'efidebug boot next 2',
                 'bootefi bootmgr'])
-            assert(re.search('\'HELLO2\' failed', ''.join(output)))
+            assert('\'HELLO2\' failed' in ''.join(output))
             output = u_boot_console.run_command_list([
                 'efidebug boot next 2',
                 'efidebug test bootmgr'])
-            assert(re.search('efi_start_image[(][)] returned: 26',
-                ''.join(output)))
-            assert(not re.search('Hello, world!', ''.join(output)))
+            assert('efi_start_image() returned: 26' in ''.join(output))
+            assert(not 'Hello, world!' in ''.join(output))
 
         with u_boot_console.log.section('Test Case 1d'):
             # Test Case 1d, authenticated by db
             output = u_boot_console.run_command_list([
                 'efidebug boot next 1',
                 'bootefi bootmgr'])
-            assert(re.search('Hello, world!', ''.join(output)))
+            assert('Hello, world!' in ''.join(output))
 
     def test_efi_signed_image_auth2(self, u_boot_console, efi_boot_env):
         """
@@ -86,32 +84,30 @@ class TestEfiSignedImage(object):
                 'setenv -e -nv -bs -rt -at -i 4000000,$filesize KEK',
                 'fatload host 0:1 4000000 PK.auth',
                 'setenv -e -nv -bs -rt -at -i 4000000,$filesize PK'])
-            assert(not re.search('Failed to set EFI variable', ''.join(output)))
+            assert(not 'Failed to set EFI variable' in ''.join(output))
             output = u_boot_console.run_command_list([
                 'efidebug boot add 1 HELLO host 0:1 /helloworld.efi.signed ""',
                 'efidebug boot next 1',
                 'bootefi bootmgr'])
-            assert(re.search('\'HELLO\' failed', ''.join(output)))
+            assert('\'HELLO\' failed' in ''.join(output))
             output = u_boot_console.run_command_list([
                 'efidebug boot next 1',
                 'efidebug test bootmgr'])
-            assert(re.search('efi_start_image[(][)] returned: 26',
-                ''.join(output)))
-            assert(not re.search('Hello, world!', ''.join(output)))
+            assert('efi_start_image() returned: 26' in ''.join(output))
+            assert(not 'Hello, world!' in ''.join(output))
 
         with u_boot_console.log.section('Test Case 2b'):
             # Test Case 2b, rejected by dbx even if db allows
             output = u_boot_console.run_command_list([
                 'fatload host 0:1 4000000 db.auth',
                 'setenv -e -nv -bs -rt -at -i 4000000,$filesize db'])
-            assert(not re.search('Failed to set EFI variable', ''.join(output)))
+            assert(not 'Failed to set EFI variable' in ''.join(output))
             output = u_boot_console.run_command_list([
                 'efidebug boot next 1',
                 'bootefi bootmgr'])
-            assert(re.search('\'HELLO\' failed', ''.join(output)))
+            assert('\'HELLO\' failed' in ''.join(output))
             output = u_boot_console.run_command_list([
                 'efidebug boot next 1',
                 'efidebug test bootmgr'])
-            assert(re.search('efi_start_image[(][)] returned: 26',
-                ''.join(output)))
-            assert(not re.search('Hello, world!', ''.join(output)))
+            assert('efi_start_image() returned: 26' in ''.join(output))
+            assert(not 'Hello, world!' in ''.join(output))
diff --git a/test/py/tests/test_efi_secboot/test_unsigned.py b/test/py/tests/test_efi_secboot/test_unsigned.py
index 22d849afb89b..c42c5ddc4774 100644
--- a/test/py/tests/test_efi_secboot/test_unsigned.py
+++ b/test/py/tests/test_efi_secboot/test_unsigned.py
@@ -9,7 +9,6 @@ This test verifies image authentication for unsigned images.
 """
 
 import pytest
-import re
 from defs import *
 
 @pytest.mark.boardspec('sandbox')
@@ -33,19 +32,18 @@ class TestEfiUnsignedImage(object):
 		'setenv -e -nv -bs -rt -at -i 4000000,$filesize KEK',
 		'fatload host 0:1 4000000 PK.auth',
 		'setenv -e -nv -bs -rt -at -i 4000000,$filesize PK'])
-            assert(not re.search('Failed to set EFI variable', ''.join(output)))
+            assert(not 'Failed to set EFI variable' in ''.join(output))
 
             output = u_boot_console.run_command_list([
                 'efidebug boot add 1 HELLO host 0:1 /helloworld.efi ""',
                 'efidebug boot next 1',
                 'bootefi bootmgr'])
-            assert(re.search('\'HELLO\' failed', ''.join(output)))
+            assert('\'HELLO\' failed' in ''.join(output))
             output = u_boot_console.run_command_list([
                 'efidebug boot next 1',
                 'efidebug test bootmgr'])
-            assert(re.search('efi_start_image[(][)] returned: 26',
-                ''.join(output)))
-            assert(not re.search('Hello, world!', ''.join(output)))
+            assert('efi_start_image() returned: 26' in ''.join(output))
+            assert(not 'Hello, world!' in ''.join(output))
 
     def test_efi_unsigned_image_auth2(self, u_boot_console, efi_boot_env):
         """
@@ -63,13 +61,13 @@ class TestEfiUnsignedImage(object):
 		'setenv -e -nv -bs -rt -at -i 4000000,$filesize KEK',
 		'fatload host 0:1 4000000 PK.auth',
 		'setenv -e -nv -bs -rt -at -i 4000000,$filesize PK'])
-            assert(not re.search('Failed to set EFI variable', ''.join(output)))
+            assert(not 'Failed to set EFI variable' in ''.join(output))
 
             output = u_boot_console.run_command_list([
                 'efidebug boot add 1 HELLO host 0:1 /helloworld.efi ""',
                 'efidebug boot next 1',
                 'bootefi bootmgr'])
-            assert(re.search('Hello, world!', ''.join(output)))
+            assert('Hello, world!' in ''.join(output))
 
     def test_efi_unsigned_image_auth3(self, u_boot_console, efi_boot_env):
         """
@@ -87,35 +85,33 @@ class TestEfiUnsignedImage(object):
 		'setenv -e -nv -bs -rt -at -i 4000000,$filesize KEK',
 		'fatload host 0:1 4000000 PK.auth',
 		'setenv -e -nv -bs -rt -at -i 4000000,$filesize PK'])
-            assert(not re.search('Failed to set EFI variable', ''.join(output)))
+            assert(not 'Failed to set EFI variable' in ''.join(output))
 
             output = u_boot_console.run_command_list([
                 'efidebug boot add 1 HELLO host 0:1 /helloworld.efi ""',
                 'efidebug boot next 1',
                 'bootefi bootmgr'])
-            assert(re.search('\'HELLO\' failed', ''.join(output)))
+            assert('\'HELLO\' failed' in ''.join(output))
             output = u_boot_console.run_command_list([
                 'efidebug boot next 1',
                 'efidebug test bootmgr'])
-            assert(re.search('efi_start_image[(][)] returned: 26',
-                ''.join(output)))
-            assert(not re.search('Hello, world!', ''.join(output)))
+            assert('efi_start_image() returned: 26' in ''.join(output))
+            assert(not 'Hello, world!' in ''.join(output))
 
         with u_boot_console.log.section('Test Case 3b'):
             # Test Case 3b, rejected by dbx even if db allows
             output = u_boot_console.run_command_list([
 		'fatload host 0:1 4000000 db_hello.auth',
 		'setenv -e -nv -bs -rt -at -i 4000000,$filesize db'])
-            assert(not re.search('Failed to set EFI variable', ''.join(output)))
+            assert(not 'Failed to set EFI variable' in ''.join(output))
 
             output = u_boot_console.run_command_list([
                 'efidebug boot add 1 HELLO host 0:1 /helloworld.efi ""',
                 'efidebug boot next 1',
                 'bootefi bootmgr'])
-            assert(re.search('\'HELLO\' failed', ''.join(output)))
+            assert('\'HELLO\' failed' in ''.join(output))
             output = u_boot_console.run_command_list([
                 'efidebug boot next 1',
                 'efidebug test bootmgr'])
-            assert(re.search('efi_start_image[(][)] returned: 26',
-                ''.join(output)))
-            assert(not re.search('Hello, world!', ''.join(output)))
+            assert('efi_start_image() returned: 26' in ''.join(output))
+            assert(not 'Hello, world!' in ''.join(output))
