diff --git a/scripts/pylib/twister/twister/cmakecache.py b/scripts/pylib/twister/twisterlib/cmakecache.py
similarity index 100%
rename from scripts/pylib/twister/twister/cmakecache.py
rename to scripts/pylib/twister/twisterlib/cmakecache.py
diff --git a/scripts/pylib/twister/twister/config_parser.py b/scripts/pylib/twister/twisterlib/config_parser.py
similarity index 99%
rename from scripts/pylib/twister/twister/config_parser.py
rename to scripts/pylib/twister/twisterlib/config_parser.py
index 106fdb4f8b9..ae8a1abf8fa 100644
--- a/scripts/pylib/twister/twister/config_parser.py
+++ b/scripts/pylib/twister/twisterlib/config_parser.py
@@ -4,6 +4,7 @@
 # SPDX-License-Identifier: Apache-2.0
 
 import scl
+from twisterlib.error import ConfigurationError
 
 class TwisterConfigParser:
     """Class to read testsuite yaml files with semantic checking
diff --git a/scripts/pylib/twister/twister/coverage.py b/scripts/pylib/twister/twisterlib/coverage.py
similarity index 100%
rename from scripts/pylib/twister/twister/coverage.py
rename to scripts/pylib/twister/twisterlib/coverage.py
diff --git a/scripts/pylib/twister/twister/enviornment.py b/scripts/pylib/twister/twisterlib/enviornment.py
similarity index 99%
rename from scripts/pylib/twister/twister/enviornment.py
rename to scripts/pylib/twister/twisterlib/enviornment.py
index ac82b8e9068..c56c2a4c63b 100644
--- a/scripts/pylib/twister/twister/enviornment.py
+++ b/scripts/pylib/twister/twisterlib/enviornment.py
@@ -17,7 +17,7 @@ import argparse
 logger = logging.getLogger('twister')
 logger.setLevel(logging.DEBUG)
 
-from twister.error import TwisterRuntimeError
+from twisterlib.error import TwisterRuntimeError
 
 ZEPHYR_BASE = os.getenv("ZEPHYR_BASE")
 if not ZEPHYR_BASE:
@@ -627,7 +627,7 @@ structure in the main Zephyr tree: boards/<arch>/<board_name>/""")
         sys.exit(1)
 
     if options.size:
-        from twister.size_calc import SizeCalculator
+        from twisterlib.size_calc import SizeCalculator
         for fn in options.size:
             sc = SizeCalculator(fn, [])
             sc.size_report()
diff --git a/scripts/pylib/twister/twister/error.py b/scripts/pylib/twister/twisterlib/error.py
similarity index 100%
rename from scripts/pylib/twister/twister/error.py
rename to scripts/pylib/twister/twisterlib/error.py
diff --git a/scripts/pylib/twister/twister/handlers.py b/scripts/pylib/twister/twisterlib/handlers.py
similarity index 99%
rename from scripts/pylib/twister/twister/handlers.py
rename to scripts/pylib/twister/twisterlib/handlers.py
index ddfd933587f..28cdc8ac33c 100644
--- a/scripts/pylib/twister/twister/handlers.py
+++ b/scripts/pylib/twister/twisterlib/handlers.py
@@ -15,7 +15,8 @@ import shlex
 import subprocess
 import threading
 import select
-from twister.enviornment import ZEPHYR_BASE
+import re
+from twisterlib.enviornment import ZEPHYR_BASE
 
 try:
     import serial
diff --git a/scripts/pylib/twister/twister/hardwaremap.py b/scripts/pylib/twister/twisterlib/hardwaremap.py
similarity index 99%
rename from scripts/pylib/twister/twister/hardwaremap.py
rename to scripts/pylib/twister/twisterlib/hardwaremap.py
index 3e81d1ea611..53f7b0c0a73 100644
--- a/scripts/pylib/twister/twister/hardwaremap.py
+++ b/scripts/pylib/twister/twisterlib/hardwaremap.py
@@ -14,7 +14,7 @@ import scl
 import logging
 from pathlib import Path
 
-from twister.enviornment import ZEPHYR_BASE
+from twisterlib.enviornment import ZEPHYR_BASE
 
 try:
     # Use the C LibYAML parser if available, rather than the Python parser.
@@ -153,7 +153,6 @@ class HardwareMap:
         if not self.options.device_testing and self.options.hardware_map:
             self.load(self.options.hardware_map)
             logger.info("Available devices:")
-            table = []
             self.dump(connected_only=True)
             return 0
 
diff --git a/scripts/pylib/twister/twister/harness.py b/scripts/pylib/twister/twisterlib/harness.py
similarity index 100%
rename from scripts/pylib/twister/twister/harness.py
rename to scripts/pylib/twister/twisterlib/harness.py
diff --git a/scripts/pylib/twister/twister/mixins.py b/scripts/pylib/twister/twisterlib/mixins.py
similarity index 99%
rename from scripts/pylib/twister/twister/mixins.py
rename to scripts/pylib/twister/twisterlib/mixins.py
index a4b4935057c..d174edd0f45 100644
--- a/scripts/pylib/twister/twister/mixins.py
+++ b/scripts/pylib/twister/twisterlib/mixins.py
@@ -5,4 +5,3 @@
 
 class DisablePyTestCollectionMixin(object):
     __test__ = False
-
diff --git a/scripts/pylib/twister/twister/platform.py b/scripts/pylib/twister/twisterlib/platform.py
similarity index 96%
rename from scripts/pylib/twister/twister/platform.py
rename to scripts/pylib/twister/twisterlib/platform.py
index 058c4c4880a..adda8b85045 100644
--- a/scripts/pylib/twister/twister/platform.py
+++ b/scripts/pylib/twister/twisterlib/platform.py
@@ -6,8 +6,8 @@
 
 import os
 import scl
-from twister.config_parser import TwisterConfigParser
-from twister.enviornment import ZEPHYR_BASE
+from twisterlib.config_parser import TwisterConfigParser
+from twisterlib.enviornment import ZEPHYR_BASE
 
 class Platform:
     """Class representing metadata for a particular platform
diff --git a/scripts/pylib/twister/twister/reports.py b/scripts/pylib/twister/twisterlib/reports.py
similarity index 99%
rename from scripts/pylib/twister/twister/reports.py
rename to scripts/pylib/twister/twisterlib/reports.py
index ab283242ce1..6c805ddb6ec 100644
--- a/scripts/pylib/twister/twister/reports.py
+++ b/scripts/pylib/twister/twisterlib/reports.py
@@ -497,4 +497,3 @@ class Reporting:
             else:
                 filename = os.path.join(outdir,"{}.xml".format(platform))
             self.xunit_report(json_file, filename, platform, full_report=True)
-
diff --git a/scripts/pylib/twister/twister/runner.py b/scripts/pylib/twister/twisterlib/runner.py
similarity index 99%
rename from scripts/pylib/twister/twister/runner.py
rename to scripts/pylib/twister/twisterlib/runner.py
index 1420ae912bc..f85b4a0ce79 100644
--- a/scripts/pylib/twister/twister/runner.py
+++ b/scripts/pylib/twister/twisterlib/runner.py
@@ -17,11 +17,8 @@ import traceback
 from colorama import Fore
 from multiprocessing import Lock, Process, Value
 from multiprocessing.managers import BaseManager
-
-from numpy import trace
-
-from twister.cmakecache import CMakeCache
-from twister.enviornment import canonical_zephyr_base
+from twisterlib.cmakecache import CMakeCache
+from twisterlib.enviornment import canonical_zephyr_base
 
 logger = logging.getLogger('twister')
 logger.setLevel(logging.DEBUG)
@@ -881,4 +878,3 @@ class TwisterRunner:
             logger.info("Execution interrupted")
             for p in processes:
                 p.terminate()
-
diff --git a/scripts/pylib/twister/twister/size_calc.py b/scripts/pylib/twister/twisterlib/size_calc.py
similarity index 99%
rename from scripts/pylib/twister/twister/size_calc.py
rename to scripts/pylib/twister/twisterlib/size_calc.py
index b210ea21d12..c59ecf3381f 100644
--- a/scripts/pylib/twister/twister/size_calc.py
+++ b/scripts/pylib/twister/twisterlib/size_calc.py
@@ -5,7 +5,8 @@
 # SPDX-License-Identifier: Apache-2.0
 
 import subprocess
-from twister.error import TwisterRuntimeError
+import sys
+from twisterlib.error import TwisterRuntimeError
 
 
 class SizeCalculator:
@@ -224,4 +225,3 @@ class SizeCalculator:
             self.sections.append({"name": name, "load_addr": load_addr,
                                   "size": size, "virt_addr": virt_addr,
                                   "type": stype, "recognized": recognized})
-
diff --git a/scripts/pylib/twister/twister/testinstance.py b/scripts/pylib/twister/twisterlib/testinstance.py
similarity index 97%
rename from scripts/pylib/twister/twister/testinstance.py
rename to scripts/pylib/twister/twisterlib/testinstance.py
index 5a145bf5a20..e947550033d 100644
--- a/scripts/pylib/twister/twister/testinstance.py
+++ b/scripts/pylib/twister/twisterlib/testinstance.py
@@ -7,12 +7,15 @@ import os
 import hashlib
 import random
 import logging
-from twister.testsuite import TestCase
-from twister.error import BuildError
-from twister.handlers import BinaryHandler, QEMUHandler, DeviceHandler
 import shutil
 import glob
 
+from twisterlib.testsuite import TestCase
+from twisterlib.error import BuildError
+from twisterlib.size_calc import SizeCalculator
+from twisterlib.handlers import BinaryHandler, QEMUHandler, DeviceHandler
+
+
 logger = logging.getLogger('twister')
 logger.setLevel(logging.DEBUG)
 
diff --git a/scripts/pylib/twister/twister/testplan.py b/scripts/pylib/twister/twisterlib/testplan.py
similarity index 98%
rename from scripts/pylib/twister/twister/testplan.py
rename to scripts/pylib/twister/twisterlib/testplan.py
index 7cd8fe3d2a0..74314a7238f 100755
--- a/scripts/pylib/twister/twister/testplan.py
+++ b/scripts/pylib/twister/twisterlib/testplan.py
@@ -10,13 +10,10 @@ import subprocess
 import glob
 import json
 import collections
-from typing import List
 from collections import OrderedDict
 from itertools import islice
 import logging
 
-
-
 logger = logging.getLogger('twister')
 logger.setLevel(logging.DEBUG)
 
@@ -25,23 +22,15 @@ try:
 except ImportError:
     print("Install the anytree module to use the --test-tree option")
 
-from twister.testsuite import TestSuite, scan_testsuite_path
-from twister.error import TwisterRuntimeError
-from twister.platform import Platform
-from twister.config_parser import TwisterConfigParser
-from twister.testinstance import TestInstance
+from twisterlib.testsuite import TestSuite, scan_testsuite_path
+from twisterlib.error import TwisterRuntimeError
+from twisterlib.platform import Platform
+from twisterlib.config_parser import TwisterConfigParser
+from twisterlib.testinstance import TestInstance
 
 
 from zephyr_module import west_projects, parse_modules
 
-try:
-    # Use the C LibYAML parser if available, rather than the Python parser.
-    # It's much faster.
-    from yaml import CSafeLoader as SafeLoader
-    from yaml import CDumper as Dumper
-except ImportError:
-    from yaml import SafeLoader, Dumper
-
 ZEPHYR_BASE = os.getenv("ZEPHYR_BASE")
 if not ZEPHYR_BASE:
     sys.exit("$ZEPHYR_BASE environment variable undefined")
@@ -51,8 +40,6 @@ sys.path.insert(0, os.path.join(ZEPHYR_BASE, "scripts", "dts",
                                 "python-devicetree", "src"))
 from devicetree import edtlib  # pylint: disable=unused-import
 
-from twister.enviornment import TwisterEnv, canonical_zephyr_base
-
 sys.path.insert(0, os.path.join(ZEPHYR_BASE, "scripts/"))
 
 import scl
@@ -208,7 +195,7 @@ class TestPlan:
             s =  self.options.subset
             try:
                 subset, sets = (int(x) for x in s.split("/"))
-            except ValueError as e:
+            except ValueError:
                 raise TwisterRuntimeError("Bad subset value.")
 
             if subset > sets:
@@ -325,7 +312,7 @@ class TestPlan:
                 if not area:
                     area = Node(sec[1], parent=samples)
 
-                t = Node(test, parent=area)
+                Node(test, parent=area)
             else:
                 sec = test.split(".")
                 area = find(tests, lambda node: node.name == sec[0] and node.parent == tests)
@@ -336,7 +323,7 @@ class TestPlan:
                     subarea = find(area, lambda node: node.name == sec[1] and node.parent == area)
                     if not subarea:
                         subarea = Node(sec[1], parent=area)
-                    t = Node(test, parent=subarea)
+                    Node(test, parent=subarea)
 
         for pre, _, node in RenderTree(testsuite):
             print("%s%s" % (pre, node.name))
@@ -355,14 +342,13 @@ class TestPlan:
     def report_excluded_tests(self):
         all_tests = self.get_all_tests()
         to_be_run = set()
-        for i, p in self.instances.items():
+        for _, p in self.instances.items():
             to_be_run.update(p.testsuite.cases)
 
         if all_tests - to_be_run:
             print("Tests that never build or run:")
             for not_run in all_tests - to_be_run:
                 print("- {}".format(not_run))
-        return
 
     def report_platform_tests(self, platforms=[]):
         if len(platforms) > 1:
@@ -378,8 +364,6 @@ class TestPlan:
                     count += 1
             print(f"Tests found: {count}")
 
-        return
-
     def get_platform_instances(self, platform):
         filtered_dict = {k:v for k,v in self.instances.items() if k.startswith(platform + os.sep)}
         return filtered_dict
diff --git a/scripts/pylib/twister/twister/testsuite.py b/scripts/pylib/twister/twisterlib/testsuite.py
similarity index 98%
rename from scripts/pylib/twister/twister/testsuite.py
rename to scripts/pylib/twister/twisterlib/testsuite.py
index 08984312c2b..6f975017053 100644
--- a/scripts/pylib/twister/twister/testsuite.py
+++ b/scripts/pylib/twister/twisterlib/testsuite.py
@@ -4,7 +4,6 @@
 # SPDX-License-Identifier: Apache-2.0
 
 import os
-import sys
 from pathlib import Path
 import re
 import logging
@@ -12,9 +11,9 @@ import contextlib
 import mmap
 import glob
 from typing import List
-from twister.mixins import DisablePyTestCollectionMixin
-from twister.enviornment import canonical_zephyr_base
-from twister.error import TwisterException, TwisterRuntimeError
+from twisterlib.mixins import DisablePyTestCollectionMixin
+from twisterlib.enviornment import canonical_zephyr_base
+from twisterlib.error import TwisterException, TwisterRuntimeError
 
 logger = logging.getLogger('twister')
 logger.setLevel(logging.DEBUG)
@@ -422,4 +421,3 @@ Tests should reference the category and subsystem with a dot as a separator.
                     """
                     )
         return unique
-
diff --git a/scripts/tests/twister/conftest.py b/scripts/tests/twister/conftest.py
index 2576c146192..8ee351206f2 100644
--- a/scripts/tests/twister/conftest.py
+++ b/scripts/tests/twister/conftest.py
@@ -12,9 +12,9 @@ import pytest
 ZEPHYR_BASE = os.getenv("ZEPHYR_BASE")
 sys.path.insert(0, os.path.join(ZEPHYR_BASE, "scripts/pylib/twister"))
 sys.path.insert(0, os.path.join(ZEPHYR_BASE, "scripts"))
-from twister.testplan import TestPlan
-from twister.testinstance import TestInstance
-from twister.enviornment import TwisterEnv, parse_arguments
+from twisterlib.testplan import TestPlan
+from twisterlib.testinstance import TestInstance
+from twisterlib.enviornment import TwisterEnv, parse_arguments
 
 def new_get_toolchain(*args, **kwargs):
     return 'zephyr'
diff --git a/scripts/tests/twister/test_testinstance.py b/scripts/tests/twister/test_testinstance.py
index c0315dde5b4..1bfc251ff8c 100644
--- a/scripts/tests/twister/test_testinstance.py
+++ b/scripts/tests/twister/test_testinstance.py
@@ -13,9 +13,9 @@ import pytest
 
 ZEPHYR_BASE = os.getenv("ZEPHYR_BASE")
 sys.path.insert(0, os.path.join(ZEPHYR_BASE, "scripts/pylib/twister"))
-from twister.testinstance import TestInstance
-from twister.error import BuildError, TwisterException
-from twister.testsuite import TestSuite
+from twisterlib.testinstance import TestInstance
+from twisterlib.error import BuildError, TwisterException
+from twisterlib.testsuite import TestSuite
 
 
 TESTDATA_1 = [
diff --git a/scripts/tests/twister/test_testplan_class.py b/scripts/tests/twister/test_testplan_class.py
index 0b3038dfeb7..e98020610fc 100644
--- a/scripts/tests/twister/test_testplan_class.py
+++ b/scripts/tests/twister/test_testplan_class.py
@@ -13,10 +13,10 @@ import pytest
 ZEPHYR_BASE = os.getenv("ZEPHYR_BASE")
 sys.path.insert(0, os.path.join(ZEPHYR_BASE, "scripts/pylib/twister"))
 
-from twister.testplan import TestPlan
-from twister.testinstance import TestInstance
-from twister.testsuite import TestSuite
-from twister.platform import Platform
+from twisterlib.testplan import TestPlan
+from twisterlib.testinstance import TestInstance
+from twisterlib.testsuite import TestSuite
+from twisterlib.platform import Platform
 
 
 def test_testplan_add_testsuites(class_testplan):
@@ -255,4 +255,3 @@ def test_add_instances(test_data, class_env, all_testsuites_dict, platforms_list
 		   [platform.name + '/' + s for s in list(all_testsuites_dict.keys())]
     assert all(isinstance(n, TestInstance) for n in list(plan.instances.values()))
     assert list(plan.instances.values()) == instance_list
-
diff --git a/scripts/tests/twister/test_testsuite.py b/scripts/tests/twister/test_testsuite.py
index b64cbd92e64..aea931ae0d7 100644
--- a/scripts/tests/twister/test_testsuite.py
+++ b/scripts/tests/twister/test_testsuite.py
@@ -2,7 +2,6 @@
 # Copyright (c) 2020 Intel Corporation
 #
 # SPDX-License-Identifier: Apache-2.0
-# pylint: disable=line-too-long
 """
 Tests for testinstance class
 """
@@ -14,7 +13,7 @@ import pytest
 ZEPHYR_BASE = os.getenv("ZEPHYR_BASE")
 sys.path.insert(0, os.path.join(ZEPHYR_BASE, "scripts/pylib/twister"))
 
-from twister.testsuite import scan_file, ScanPathResult
+from twisterlib.testsuite import scan_file, ScanPathResult
 
 TESTDATA_5 = [
     ("testsuites/tests/test_ztest.c",
@@ -59,4 +58,3 @@ def test_scan_file(test_data, test_file, class_env, expected: ScanPathResult):
 
     result: ScanPathResult = scan_file(os.path.join(test_data, test_file))
     assert result == expected
-
diff --git a/scripts/tests/twister/test_twister.py b/scripts/tests/twister/test_twister.py
index a6329e985c0..89c0dda4094 100644
--- a/scripts/tests/twister/test_twister.py
+++ b/scripts/tests/twister/test_twister.py
@@ -14,7 +14,7 @@ ZEPHYR_BASE = os.getenv("ZEPHYR_BASE")
 sys.path.insert(0, os.path.join(ZEPHYR_BASE, "scripts/pylib/twister"))
 
 import scl
-from twister.testplan import TwisterConfigParser
+from twisterlib.testplan import TwisterConfigParser
 
 def test_yamlload():
     """ Test to check if loading the non-existent files raises the errors """
diff --git a/scripts/twister b/scripts/twister
index 7472b6ffbba..68daaa0fd82 100755
--- a/scripts/twister
+++ b/scripts/twister
@@ -187,20 +187,14 @@ if not ZEPHYR_BASE:
 
     print(f'ZEPHYR_BASE unset, using "{ZEPHYR_BASE}"')
 
+sys.path.insert(0, os.path.join(ZEPHYR_BASE, "scripts/pylib/twister/"))
 
-try:
-    from tabulate import tabulate
-except ImportError:
-    print("Install tabulate python module with pip to use --device-testing option.")
-
-sys.path.insert(0, os.path.join(ZEPHYR_BASE, "scripts/pylib/twister"))
-
-from twister.testplan import TestPlan
-from twister.enviornment import TwisterEnv, parse_arguments
-from twister.reports import Reporting
-from twister.hardwaremap import HardwareMap
-from twister.coverage import run_coverage
-from twister.runner import TwisterRunner
+from twisterlib.testplan import TestPlan
+from twisterlib.enviornment import TwisterEnv, parse_arguments
+from twisterlib.reports import Reporting
+from twisterlib.hardwaremap import HardwareMap
+from twisterlib.coverage import run_coverage
+from twisterlib.runner import TwisterRunner
 
 logger = logging.getLogger('twister')
 logger.setLevel(logging.DEBUG)