diff --git a/scripts/pylib/twister/twisterlib/environment.py b/scripts/pylib/twister/twisterlib/environment.py
index 4fb0fbb8ffe..cbc36e12ff8 100644
--- a/scripts/pylib/twister/twisterlib/environment.py
+++ b/scripts/pylib/twister/twisterlib/environment.py
@@ -222,6 +222,7 @@ Artificially long but functional example:
                         help="""Flash device before attaching to serial port.
                         This is useful for devices that share the same port for programming
                         and serial console, or use soft-USB, where flash must come first.
+                        Also, it skips reading remaining logs from the old image run.
                         """)
 
     test_or_build.add_argument(
@@ -971,10 +972,6 @@ def parse_arguments(
         logger.error("--device-flash-with-test does not apply when --flash-before is used")
         sys.exit(1)
 
-    if options.flash_before and options.device_serial_pty:
-        logger.error("--device-serial-pty cannot be used when --flash-before is set (for now)")
-        sys.exit(1)
-
     if options.shuffle_tests and options.subset is None:
         logger.error("--shuffle-tests requires --subset")
         sys.exit(1)
diff --git a/scripts/pylib/twister/twisterlib/hardwaremap.py b/scripts/pylib/twister/twisterlib/hardwaremap.py
index d3308b8cbe3..74c384ab5d6 100644
--- a/scripts/pylib/twister/twisterlib/hardwaremap.py
+++ b/scripts/pylib/twister/twisterlib/hardwaremap.py
@@ -212,7 +212,7 @@ class HardwareMap:
                                 True,
                                 flash_timeout=self.options.device_flash_timeout,
                                 flash_with_test=self.options.device_flash_with_test,
-                                flash_before=False,
+                                flash_before=self.options.flash_before,
                                 )
 
             # the fixtures given by twister command explicitly should be assigned to each DUT
@@ -275,7 +275,7 @@ class HardwareMap:
             serial_pty = dut.get('serial_pty')
             flash_before = dut.get('flash_before')
             if flash_before is None:
-                flash_before = self.options.flash_before and (not (flash_with_test or serial_pty))
+                flash_before = self.options.flash_before and (not flash_with_test)
             platform = dut.get('platform')
             if isinstance(platform, str):
                 platforms = platform.split()