diff --git a/pytest_timeout.py b/pytest_timeout.py
index 192a16c..f127a46 100644
--- a/pytest_timeout.py
+++ b/pytest_timeout.py
@@ -407,7 +407,7 @@ def _parse_marker(marker):
     """
     if not marker.args and not marker.kwargs:
         raise TypeError("Timeout marker must have at least one argument")
-    timeout = method = func_only = NOTSET = object()  # noqa: N806
+    timeout = method = func_only = disable_debugger_detection = NOTSET = object()  # noqa: N806
     for kw, val in marker.kwargs.items():
         if kw == "timeout":
             timeout = val
@@ -415,6 +415,8 @@ def _parse_marker(marker):
             method = val
         elif kw == "func_only":
             func_only = val
+        elif kw == "disable_debugger_detection":
+            disable_debugger_detection = val
         else:
             msg = f"Invalid keyword argument for timeout marker: {kw}"
             raise TypeError(msg)
@@ -434,7 +436,9 @@ def _parse_marker(marker):
         method = None
     if func_only is NOTSET:
         func_only = None
-    return Settings(timeout, method, func_only, None)
+    if disable_debugger_detection is NOTSET:
+        disable_debugger_detection = None
+    return Settings(timeout, method, func_only, disable_debugger_detection)
 
 
 def _validate_timeout(timeout, where):
diff --git a/test_pytest_timeout.py b/test_pytest_timeout.py
index 178cb3e..7ff4cf6 100644
--- a/test_pytest_timeout.py
+++ b/test_pytest_timeout.py
@@ -462,6 +462,27 @@ def test_marker_help(pytester):
     result.stdout.fnmatch_lines(["@pytest.mark.timeout(*"])
 
 
+def test_timeout_marker_disable_debugger_detection_keyword(pytester):
+    # the marker registration documents the disable_debugger_detection
+    # keyword, so using it must not fail with an invalid-kwarg TypeError
+    pytester.makepyfile(
+        """
+        import pytest
+
+        @pytest.mark.timeout(60, disable_debugger_detection=True)
+        def test_marker_kwarg_ok():
+            assert True
+
+        @pytest.mark.timeout(60, method="thread", func_only=True,
+                            disable_debugger_detection=True)
+        def test_marker_kwarg_with_others_ok():
+            assert True
+        """
+    )
+    result = pytester.runpytest_subprocess()
+    result.assert_outcomes(passed=2)
+
+
 @pytest.mark.parametrize(
     ("debugging_module", "debugging_set_trace"),
     [