diff --git a/tools/testing/kunit/kunit.py b/tools/testing/kunit/kunit.py
index 68e6f461c758..be58f4c93806 100755
--- a/tools/testing/kunit/kunit.py
+++ b/tools/testing/kunit/kunit.py
@@ -280,6 +280,10 @@ def add_common_opts(parser) -> None:
 			     ' If given a directory, (e.g. lib/kunit), "/.kunitconfig" '
 			     'will get  automatically appended.',
 			     metavar='kunitconfig')
+	parser.add_argument('--kconfig_add',
+			     help='Additional Kconfig options to append to the '
+			     '.kunitconfig, e.g. CONFIG_KASAN=y. Can be repeated.',
+			    action='append')
 
 	parser.add_argument('--arch',
 			    help=('Specifies the architecture to run tests under. '
@@ -398,6 +402,7 @@ def main(argv, linux=None):
 		if not linux:
 			linux = kunit_kernel.LinuxSourceTree(cli_args.build_dir,
 					kunitconfig_path=cli_args.kunitconfig,
+					kconfig_add=cli_args.kconfig_add,
 					arch=cli_args.arch,
 					cross_compile=cli_args.cross_compile,
 					qemu_config_path=cli_args.qemu_config)
@@ -423,6 +428,7 @@ def main(argv, linux=None):
 		if not linux:
 			linux = kunit_kernel.LinuxSourceTree(cli_args.build_dir,
 					kunitconfig_path=cli_args.kunitconfig,
+					kconfig_add=cli_args.kconfig_add,
 					arch=cli_args.arch,
 					cross_compile=cli_args.cross_compile,
 					qemu_config_path=cli_args.qemu_config)
@@ -439,6 +445,7 @@ def main(argv, linux=None):
 		if not linux:
 			linux = kunit_kernel.LinuxSourceTree(cli_args.build_dir,
 					kunitconfig_path=cli_args.kunitconfig,
+					kconfig_add=cli_args.kconfig_add,
 					arch=cli_args.arch,
 					cross_compile=cli_args.cross_compile,
 					qemu_config_path=cli_args.qemu_config)
@@ -457,6 +464,7 @@ def main(argv, linux=None):
 		if not linux:
 			linux = kunit_kernel.LinuxSourceTree(cli_args.build_dir,
 					kunitconfig_path=cli_args.kunitconfig,
+					kconfig_add=cli_args.kconfig_add,
 					arch=cli_args.arch,
 					cross_compile=cli_args.cross_compile,
 					qemu_config_path=cli_args.qemu_config)
diff --git a/tools/testing/kunit/kunit_kernel.py b/tools/testing/kunit/kunit_kernel.py
index 51ee6e5dae91..7d459d6d6ff2 100644
--- a/tools/testing/kunit/kunit_kernel.py
+++ b/tools/testing/kunit/kunit_kernel.py
@@ -224,6 +224,7 @@ class LinuxSourceTree(object):
 	      build_dir: str,
 	      load_config=True,
 	      kunitconfig_path='',
+	      kconfig_add: Optional[List[str]]=None,
 	      arch=None,
 	      cross_compile=None,
 	      qemu_config_path=None) -> None:
@@ -249,6 +250,10 @@ class LinuxSourceTree(object):
 				shutil.copyfile(DEFAULT_KUNITCONFIG_PATH, kunitconfig_path)
 
 		self._kconfig = kunit_config.parse_file(kunitconfig_path)
+		if kconfig_add:
+			kconfig = kunit_config.parse_from_string('\n'.join(kconfig_add))
+			self._kconfig.merge_in_entries(kconfig)
+
 
 	def clean(self) -> bool:
 		try:
diff --git a/tools/testing/kunit/kunit_tool_test.py b/tools/testing/kunit/kunit_tool_test.py
index d125d2380b38..c1982ace312b 100755
--- a/tools/testing/kunit/kunit_tool_test.py
+++ b/tools/testing/kunit/kunit_tool_test.py
@@ -389,6 +389,10 @@ class LinuxSourceTreeTest(unittest.TestCase):
 				pass
 			kunit_kernel.LinuxSourceTree('', kunitconfig_path=dir)
 
+	def test_kconfig_add(self):
+		tree = kunit_kernel.LinuxSourceTree('', kconfig_add=['CONFIG_NOT_REAL=y'])
+		self.assertIn(kunit_config.KconfigEntry('NOT_REAL', 'y'), tree._kconfig.entries())
+
 	def test_invalid_arch(self):
 		with self.assertRaisesRegex(kunit_kernel.ConfigError, 'not a valid arch, options are.*x86_64'):
 			kunit_kernel.LinuxSourceTree('', arch='invalid')
@@ -601,6 +605,7 @@ class KUnitMainTest(unittest.TestCase):
 		# Just verify that we parsed and initialized it correctly here.
 		mock_linux_init.assert_called_once_with('.kunit',
 							kunitconfig_path='mykunitconfig',
+							kconfig_add=None,
 							arch='um',
 							cross_compile=None,
 							qemu_config_path=None)
@@ -612,6 +617,19 @@ class KUnitMainTest(unittest.TestCase):
 		# Just verify that we parsed and initialized it correctly here.
 		mock_linux_init.assert_called_once_with('.kunit',
 							kunitconfig_path='mykunitconfig',
+							kconfig_add=None,
+							arch='um',
+							cross_compile=None,
+							qemu_config_path=None)
+
+	@mock.patch.object(kunit_kernel, 'LinuxSourceTree')
+	def test_run_kconfig_add(self, mock_linux_init):
+		mock_linux_init.return_value = self.linux_source_mock
+		kunit.main(['run', '--kconfig_add=CONFIG_KASAN=y', '--kconfig_add=CONFIG_KCSAN=y'])
+		# Just verify that we parsed and initialized it correctly here.
+		mock_linux_init.assert_called_once_with('.kunit',
+							kunitconfig_path=None,
+							kconfig_add=['CONFIG_KASAN=y', 'CONFIG_KCSAN=y'],
 							arch='um',
 							cross_compile=None,
 							qemu_config_path=None)