diff --git a/scripts/pylib/twister/twisterlib/environment.py b/scripts/pylib/twister/twisterlib/environment.py
index ea1eb1856db..177cc4b3f93 100644
--- a/scripts/pylib/twister/twisterlib/environment.py
+++ b/scripts/pylib/twister/twisterlib/environment.py
@@ -614,6 +614,12 @@ structure in the main Zephyr tree: boards/<arch>/<board_name>/""")
         version or a commit ID.
         """)
 
+    parser.add_argument(
+        "--report-all-options", action="store_true",
+        help="""Show all command line options applied, including defaults, as
+        environment.options object in twister.json. Default: show only non-default settings.
+        """)
+
     parser.add_argument(
         "--retry-failed", type=int, default=0,
         help="Retry failing tests again, up to the number of times specified.")
@@ -744,7 +750,7 @@ structure in the main Zephyr tree: boards/<arch>/<board_name>/""")
     return parser
 
 
-def parse_arguments(parser, args, options = None):
+def parse_arguments(parser, args, options = None, on_init=True):
     if options is None:
         options = parser.parse_args(args)
 
@@ -862,13 +868,13 @@ def parse_arguments(parser, args, options = None):
         # Strip off the initial "--" following validation.
         options.extra_test_args = options.extra_test_args[1:]
 
-    if not options.allow_installed_plugin and PYTEST_PLUGIN_INSTALLED:
+    if on_init and not options.allow_installed_plugin and PYTEST_PLUGIN_INSTALLED:
         logger.error("By default Twister should work without pytest-twister-harness "
                      "plugin being installed, so please, uninstall it by "
                      "`pip uninstall pytest-twister-harness` and `git clean "
                      "-dxf scripts/pylib/pytest-twister-harness`.")
         sys.exit(1)
-    elif options.allow_installed_plugin and PYTEST_PLUGIN_INSTALLED:
+    elif on_init and options.allow_installed_plugin and PYTEST_PLUGIN_INSTALLED:
         logger.warning("You work with installed version of "
                        "pytest-twister-harness plugin.")
 
@@ -880,12 +886,13 @@ def strip_ansi_sequences(s: str) -> str:
 
 class TwisterEnv:
 
-    def __init__(self, options=None) -> None:
+    def __init__(self, options=None, default_options=None) -> None:
         self.version = "Unknown"
         self.toolchain = None
         self.commit_date = "Unknown"
         self.run_date = None
         self.options = options
+        self.default_options = default_options
 
         if options and options.ninja:
             self.generator_cmd = "ninja"
@@ -920,6 +927,18 @@ class TwisterEnv:
 
         self.alt_config_root = options.alt_config_root if options else None
 
+    def non_default_options(self) -> dict:
+        """Returns current command line options which are set to non-default values."""
+        diff = {}
+        if not self.options or not self.default_options:
+            return diff
+        dict_options = vars(self.options)
+        dict_default = vars(self.default_options)
+        for k in dict_options.keys():
+            if k not in dict_default or dict_options[k] != dict_default[k]:
+                diff[k] = dict_options[k]
+        return diff
+
     def discover(self):
         self.check_zephyr_version()
         self.get_toolchain()
diff --git a/scripts/pylib/twister/twisterlib/reports.py b/scripts/pylib/twister/twisterlib/reports.py
index c02bda79c4e..48c9df082c4 100644
--- a/scripts/pylib/twister/twisterlib/reports.py
+++ b/scripts/pylib/twister/twisterlib/reports.py
@@ -11,6 +11,7 @@ from colorama import Fore
 import xml.etree.ElementTree as ET
 import string
 from datetime import datetime
+from pathlib import PosixPath
 
 logger = logging.getLogger('twister')
 logger.setLevel(logging.DEBUG)
@@ -235,12 +236,23 @@ class Reporting:
 
     def json_report(self, filename, version="NA", platform=None):
         logger.info(f"Writing JSON report {filename}")
+
+        if self.env.options.report_all_options:
+            report_options = vars(self.env.options)
+        else:
+            report_options = self.env.non_default_options()
+
+        # Resolve known JSON serialization problems.
+        for k,v in report_options.items():
+            report_options[k] = str(v) if type(v) in [PosixPath] else v
+
         report = {}
         report["environment"] = {"os": os.name,
                                  "zephyr_version": version,
                                  "toolchain": self.env.toolchain,
                                  "commit_date": self.env.commit_date,
-                                 "run_date": self.env.run_date
+                                 "run_date": self.env.run_date,
+                                 "options": report_options
                                  }
         suites = []
 
diff --git a/scripts/pylib/twister/twisterlib/twister_main.py b/scripts/pylib/twister/twisterlib/twister_main.py
index f61880c1b05..33b0569f330 100644
--- a/scripts/pylib/twister/twisterlib/twister_main.py
+++ b/scripts/pylib/twister/twisterlib/twister_main.py
@@ -62,7 +62,7 @@ def init_color(colorama_strip):
     colorama.init(strip=colorama_strip)
 
 
-def main(options):
+def main(options, default_options):
     start_time = time.time()
 
     # Configure color output
@@ -105,7 +105,7 @@ def main(options):
     VERBOSE = options.verbose
     setup_logging(options.outdir, options.log_file, VERBOSE, options.timestamps)
 
-    env = TwisterEnv(options)
+    env = TwisterEnv(options, default_options)
     env.discover()
 
     hwm = HardwareMap(env)
diff --git a/scripts/twister b/scripts/twister
index aa075beb7a1..c6382f9a9e3 100755
--- a/scripts/twister
+++ b/scripts/twister
@@ -211,7 +211,8 @@ if __name__ == "__main__":
     try:
         parser = add_parse_arguments()
         options = parse_arguments(parser, sys.argv[1:])
-        ret = main(options)
+        default_options = parse_arguments(parser, [], on_init=False)
+        ret = main(options, default_options)
     finally:
         if (os.name != "nt") and os.isatty(1):
             # (OS is not Windows) and (stdout is interactive)