diff --git a/src/pytestqt/wait_signal.py b/src/pytestqt/wait_signal.py
index da98228..a76dc2c 100644
--- a/src/pytestqt/wait_signal.py
+++ b/src/pytestqt/wait_signal.py
@@ -69,7 +69,17 @@ def _quit_loop_by_timeout(self):
     def _cleanup(self):
         # store timeout message before the data to construct it is lost
         self._timeout_message = self._get_timeout_error_message()
-        self._timer.stop()
+
+        timer_meta = self._timer.metaObject()
+        timer_stop_signature = (
+            timer_meta.normalizedSignature("stop").data().decode("utf-8")
+        )
+        timer_stop_method = timer_meta.method(
+            timer_meta.indexOfMethod(timer_stop_signature)
+        )
+        timer_stop_method.invoke(
+            self._timer, qt_api.QtCore.Qt.ConnectionType.QueuedConnection
+        )
 
     def _get_timeout_error_message(self):
         """Subclasses have to implement this, returning an appropriate error message for a TimeoutError."""
diff --git a/tests/test_wait_signal.py b/tests/test_wait_signal.py
index 72d00ed..7502b91 100644
--- a/tests/test_wait_signal.py
+++ b/tests/test_wait_signal.py
@@ -1425,15 +1425,6 @@ def test_thread(qtbot, capfd, _):
     res = pytester.runpytest_subprocess("-x", "-s")
     outcomes = res.parseoutcomes()
 
-    if outcomes.get("failed", 0) and check_stderr and qt_api.pytest_qt_api == "pyside6":
-        # The test succeeds on PyQt (unsure why!), but we can't check
-        # qt_api.pytest_qt_api at import time, so we can't use
-        # pytest.mark.xfail conditionally.
-        pytest.xfail(
-            "Qt error: QObject::killTimer: "
-            "Timers cannot be stopped from another thread"
-        )
-
     res.assert_outcomes(passed=outcomes["passed"])  # no failed/error