diff --git a/CHANGELOG.md b/CHANGELOG.md
index f545785..b63e098 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,10 @@
 
 ## [Unreleased]
 ### Fixed
+- Issue [#418](https://github.com/reportportal/agent-python-pytest/issues/418) parametrize marker IDs, by @drcrazy
+
+## [5.6.4]
+### Fixed
 - Agent crash in certain `pytest-bdd` cases, by @HardNorth
 
 ## [5.6.3]
diff --git a/pytest_reportportal/service.py b/pytest_reportportal/service.py
index 685d8b5..b93d96b 100644
--- a/pytest_reportportal/service.py
+++ b/pytest_reportportal/service.py
@@ -93,6 +93,16 @@
 BACKGROUND_STEP_NAME = "Background"
 
 
+def _is_pytest_bdd_scenario(location_path: str) -> bool:
+    """
+    Return True if the pytest collection path points at pytest-bdd's scenario module.
+
+    ``Item.location[0]`` uses OS-native separators (backslashes on Windows), so a
+    plain suffix check with ``/`` is not portable. See #418.
+    """
+    return location_path.endswith(os.path.join("pytest_bdd", "scenario.py"))
+
+
 def trim_docstring(docstring: str) -> str:
     """
     Convert docstring.
@@ -907,7 +917,7 @@ def start_pytest_item(self, test_item: Optional[Item] = None):
         if not self.__started():
             self.start()
 
-        if PYTEST_BDD and test_item.location[0].endswith("/pytest_bdd/scenario.py"):
+        if PYTEST_BDD and _is_pytest_bdd_scenario(test_item.location[0]):
             self._bdd_item_by_name[test_item.name] = test_item
             return
 
@@ -928,7 +938,7 @@ def process_results(self, test_item: Item, report):
         if report.longrepr:
             self.post_log(test_item, report.longreprtext, log_level="ERROR")
 
-        if PYTEST_BDD and test_item.location[0].endswith("/pytest_bdd/scenario.py"):
+        if PYTEST_BDD and _is_pytest_bdd_scenario(test_item.location[0]):
             return
 
         leaf = self._tree_path[test_item][-1]
@@ -1011,7 +1021,7 @@ def finish_pytest_item(self, test_item: Optional[Item] = None) -> None:
         leaf = self._tree_path[test_item][-1]
         self._process_metadata_item_finish(leaf)
 
-        if PYTEST_BDD and test_item.location[0].endswith("/pytest_bdd/scenario.py"):
+        if PYTEST_BDD and _is_pytest_bdd_scenario(test_item.location[0]):
             del self._bdd_item_by_name[test_item.name]
             return
 
diff --git a/setup.py b/setup.py
index f2ba665..95f948d 100644
--- a/setup.py
+++ b/setup.py
@@ -17,7 +17,7 @@
 
 from setuptools import setup
 
-__version__ = "5.6.4"
+__version__ = "5.6.5"
 
 
 def read_file(fname):
diff --git a/tests/unit/test_service.py b/tests/unit/test_service.py
index b914cde..f28e18a 100644
--- a/tests/unit/test_service.py
+++ b/tests/unit/test_service.py
@@ -13,8 +13,23 @@
 
 """This module includes unit tests for the service.py module."""
 
+import os
+
 from delayed_assert import assert_expectations, expect
 
+from pytest_reportportal.service import _is_pytest_bdd_scenario
+
+
+def test_is_pytest_bdd_scenario_path():
+    """pytest-bdd scenario items use forward slashes in location on POSIX and backslashes on Windows."""
+    path = os.path.join("project", "pytest_bdd", "scenario.py")
+    assert _is_pytest_bdd_scenario(path) is True
+
+
+def test_is_pytest_bdd_scenario_regular_test_module():
+    """Regular tests must not be treated as pytest-bdd scenario glue."""
+    assert _is_pytest_bdd_scenario("/project/tests/test_foo.py") is False
+
 
 def test_get_item_parameters(mocked_item, rp_service):
     """Test that parameters are returned in a way supported by the client."""