diff --git a/src/aare/gui/widgets/popout_window.py b/src/aare/gui/widgets/popout_window.py
index 8d224e49..ace02255 100644
--- a/src/aare/gui/widgets/popout_window.py
+++ b/src/aare/gui/widgets/popout_window.py
@@ -201,21 +201,3 @@ class PopoutWindow(QWidget):
         self._press_global = None
         self._press_geom = None
         super().mouseReleaseEvent(event)
-
-
-if __name__ == "__main__":
-    # ponytail: smallest check that fails if the edge maths breaks
-    import os
-
-    os.environ.setdefault("QT_QPA_PLATFORM", "offscreen")
-    from PySide6.QtWidgets import QApplication, QLabel
-
-    app = QApplication([])
-    w = PopoutWindow("t", QLabel("x"))
-    w.resize(400, 300)
-    assert w._edges_at(QPoint(5, 150)) == Qt.Edge.LeftEdge
-    assert w._edges_at(QPoint(398, 298)) == (Qt.Edge.RightEdge | Qt.Edge.BottomEdge)
-    assert w._edges_at(QPoint(200, 150)) == Qt.Edge(0)
-    assert w._cursor_for(Qt.Edge.LeftEdge | Qt.Edge.TopEdge) == Qt.CursorShape.SizeFDiagCursor
-    assert w._cursor_for(Qt.Edge.RightEdge | Qt.Edge.TopEdge) == Qt.CursorShape.SizeBDiagCursor
-    print("gude")
diff --git a/src/aare/gui/widgets/wheel_value_guard.py b/src/aare/gui/widgets/wheel_value_guard.py
index 7697de8e..b4975fc9 100644
--- a/src/aare/gui/widgets/wheel_value_guard.py
+++ b/src/aare/gui/widgets/wheel_value_guard.py
@@ -46,37 +46,3 @@ class WheelValueGuard(QObject):
                 QApplication.sendEvent(area.viewport(), relayed)
             return True
         return super().eventFilter(obj, event)
-
-
-if __name__ == "__main__":
-    # ponytail: smallest check that fails if the guard logic breaks
-    import os
-
-    os.environ.setdefault("QT_QPA_PLATFORM", "offscreen")
-    from PySide6.QtCore import QPoint, QPointF
-
-    app = QApplication([])
-    guard = WheelValueGuard()
-    app.installEventFilter(guard)
-    slider = QSlider(Qt.Orientation.Horizontal)
-    slider.setRange(0, 100)
-    slider.setValue(50)
-    slider.show()
-
-    def wheel(buttons):
-        return QWheelEvent(
-            QPointF(5, 5),
-            QPointF(5, 5),
-            QPoint(0, 0),
-            QPoint(0, 120),
-            buttons,
-            Qt.KeyboardModifier.NoModifier,
-            Qt.ScrollPhase.NoScrollPhase,
-            False,
-        )
-
-    QApplication.sendEvent(slider, wheel(Qt.MouseButton.NoButton))
-    assert slider.value() == 50, "bare wheel must not adjust the slider"
-    QApplication.sendEvent(slider, wheel(Qt.MouseButton.RightButton))
-    assert slider.value() != 50, "right-button + wheel must adjust the slider"
-    print("gude")
diff --git a/tests/unit/gui/test_log_panel.py b/tests/unit/gui/test_log_panel.py
new file mode 100644
index 00000000..9c88dc14
--- /dev/null
+++ b/tests/unit/gui/test_log_panel.py
@@ -0,0 +1,29 @@
+"""The console-log pop-out is a second view on the same emitter: history is
+copied on open, live lines reach both views, and clear() empties both."""
+
+from aare.gui.panels.log_panel import LogDock
+
+
+def test_log_popout_mirrors_and_clears(qtbot):
+    dock = LogDock()
+    qtbot.addWidget(dock)
+    dock.emitter.message.emit("first line")
+    assert "first line" in dock.view.toPlainText()
+
+    dock._open_popout()
+    assert dock._popout is not None
+    assert dock._popout.isVisible()
+    # History copied on open, live lines reach both views.
+    assert "first line" in dock._popout_view.toPlainText()
+    dock.emitter.message.emit("second line")
+    assert "second line" in dock.view.toPlainText()
+    assert "second line" in dock._popout_view.toPlainText()
+
+    # Reopening reuses the window instead of stacking mirrors.
+    popout = dock._popout
+    dock._open_popout()
+    assert dock._popout is popout
+
+    dock.clear()
+    assert dock.view.toPlainText() == ""
+    assert dock._popout_view.toPlainText() == ""
diff --git a/tests/unit/gui/test_models.py b/tests/unit/gui/test_models.py
index c72ed78c..034374cc 100644
--- a/tests/unit/gui/test_models.py
+++ b/tests/unit/gui/test_models.py
@@ -121,3 +121,127 @@ def test_sample_queue_model_flags(sample_list):
     model = SampleQueueSpreadsheet(samples=sample_list[:2])
     flags = model.flags(model.index(0, 0))
     assert flags & Qt.ItemFlag.ItemIsDropEnabled
+
+
+# --- Status logic of the combined dewar/queue view ---------------------------
+# The dewar table doubles as the queue view: the frozen "#" column carries a
+# status fill (mounted > queued > flagged > measured) and the chip row filters
+# by status. This is the logic a local contact trusts at a glance, so it gets
+# its own tests.
+
+
+def _status(model, row):
+    brush = model.data(model.index(row, 0), Qt.ItemDataRole.BackgroundRole)
+    return None if brush is None else brush.color().name().lower()
+
+
+def _row_of(model, db_id):
+    return next(r for r in range(model.rowCount()) if model.get_id(r).db_id == db_id)
+
+
+@pytest.fixture
+def status_model(sample_list):
+    from aarecommon.models.models import DewarAddress, SampleShortInfo
+
+    # A measured sample: rotation_count > 1 (exactly 1 must NOT count).
+    sample_list.append(
+        SampleShortInfo(
+            db_id=4,
+            puck_name="P3",
+            dewar_name="D3",
+            sample_name="S4",
+            run_number=4,
+            user="U1",
+            pin=4,
+            rotation_count=2,
+            location=DewarAddress(segment="B", pos=1),
+        )
+    )
+    model = UserSampleSpreadsheet(samples=sample_list)
+    model.set_show_all_pgroups(True)
+    return model
+
+
+def test_status_color_priority(status_model):
+    from aare.gui.styles import (
+        SAMPLE_ROW_QUEUED_BG,
+        SAMPLE_STATUS_FLAGGED_BG,
+        SAMPLE_STATUS_MEASURED_BG,
+        SAMPLE_STATUS_QUEUED_BG,
+    )
+
+    model = status_model
+    assert _status(model, _row_of(model, 1)) is None
+
+    model.set_queued_ids({1})
+    model.set_flagged(1, True)
+    # Queued beats flagged in the All view.
+    assert _status(model, _row_of(model, 1)) == SAMPLE_STATUS_QUEUED_BG.lower()
+    model.set_queued_ids(set())
+    assert _status(model, _row_of(model, 1)) == SAMPLE_STATUS_FLAGGED_BG.lower()
+
+    # Measured is automatic: rotation_count 2 counts, the fixture's 1-3 don't.
+    assert _status(model, _row_of(model, 4)) == SAMPLE_STATUS_MEASURED_BG.lower()
+    assert _status(model, _row_of(model, 2)) is None
+
+    # Mounted always wins.
+    model.updateCurrentSample(current_puck="P1", current_sample=1)
+    assert _status(model, _row_of(model, 1)) == SAMPLE_ROW_QUEUED_BG.lower()
+
+
+def test_status_filter_selects_rows(status_model):
+    model = status_model
+    model.set_queued_ids({1, 2})
+    model.set_flagged(3, True)
+
+    model.set_status_filter("queued")
+    assert {model.get_id(r).db_id for r in range(model.rowCount())} == {1, 2}
+    model.set_status_filter("flagged")
+    assert {model.get_id(r).db_id for r in range(model.rowCount())} == {3}
+    model.set_status_filter("measured")
+    assert {model.get_id(r).db_id for r in range(model.rowCount())} == {4}
+    model.set_status_filter(None)
+    assert model.rowCount() == 4
+
+
+def test_status_tints_are_context_dependent(status_model):
+    from aare.gui.styles import SAMPLE_STATUS_FLAGGED_BG, SAMPLE_STATUS_QUEUED_BG
+
+    model = status_model
+    model.set_queued_ids({1, 2})
+    model.set_flagged(1, True)
+
+    # Queued view: own tint suppressed, only the also-flagged mark shows.
+    model.set_status_filter("queued")
+    assert _status(model, _row_of(model, 1)) == SAMPLE_STATUS_FLAGGED_BG.lower()
+    assert _status(model, _row_of(model, 2)) is None
+
+    # Flagged view: a re-queued sample wears the queued mark.
+    model.set_status_filter("flagged")
+    assert _status(model, _row_of(model, 1)) == SAMPLE_STATUS_QUEUED_BG.lower()
+
+
+def test_status_sets_refilter_while_chip_active(status_model):
+    model = status_model
+    model.set_status_filter("queued")
+    assert model.rowCount() == 0
+    model.set_queued_ids({2})
+    assert {model.get_id(r).db_id for r in range(model.rowCount())} == {2}
+
+
+def test_status_column_is_display_only(status_model):
+    model = status_model
+    assert model.data(model.index(0, 0), Qt.ItemDataRole.DisplayRole) == 1
+    before = [model.get_id(r).db_id for r in range(model.rowCount())]
+    model.sort(0, Qt.SortOrder.DescendingOrder)  # no-op on the "#" column
+    assert [model.get_id(r).db_id for r in range(model.rowCount())] == before
+
+
+def test_mime_data_round_trips_for_chip_drops(status_model):
+    from aarecommon.models.models import SampleShortInfoList
+
+    model = status_model
+    payload = model.mimeData([model.index(0, 1), model.index(1, 1)])
+    samples = SampleShortInfoList.model_validate_json(payload.text())
+    assert len(samples.s) == 2
+    assert samples.s[0].db_id == model.get_id(0).db_id
diff --git a/tests/unit/gui/test_popout_window.py b/tests/unit/gui/test_popout_window.py
new file mode 100644
index 00000000..f42fdca2
--- /dev/null
+++ b/tests/unit/gui/test_popout_window.py
@@ -0,0 +1,171 @@
+"""PopoutWindow replaces dock floating: an additional top-level window whose
+edge band resizes, whose close only hides, and whose first show lands near
+the cursor. DockTitleBar puts the pop-out button next to the close box."""
+
+from PySide6.QtCore import QEvent, QPoint, QPointF, Qt
+from PySide6.QtGui import QMouseEvent
+from PySide6.QtWidgets import QDockWidget, QLabel
+
+from aare.gui.widgets.popout_window import DockTitleBar, PopoutWindow
+
+
+def _window(qtbot):
+    w = PopoutWindow("test", QLabel("content"))
+    qtbot.addWidget(w)
+    w.resize(400, 300)
+    return w
+
+
+def test_edges_at(qtbot):
+    w = _window(qtbot)
+    band = PopoutWindow.RESIZE_MARGIN + PopoutWindow.OUTER_GRIP
+    assert w._edges_at(QPoint(band - 1, 150)) == Qt.Edge.LeftEdge
+    assert w._edges_at(QPoint(200, band - 1)) == Qt.Edge.TopEdge
+    assert w._edges_at(QPoint(399, 299)) == (Qt.Edge.RightEdge | Qt.Edge.BottomEdge)
+    assert w._edges_at(QPoint(200, 150)) == Qt.Edge(0)
+
+
+def test_cursor_for(qtbot):
+    w = _window(qtbot)
+    assert w._cursor_for(Qt.Edge.LeftEdge) == Qt.CursorShape.SizeHorCursor
+    assert w._cursor_for(Qt.Edge.BottomEdge) == Qt.CursorShape.SizeVerCursor
+    assert w._cursor_for(Qt.Edge.LeftEdge | Qt.Edge.TopEdge) == Qt.CursorShape.SizeFDiagCursor
+    assert w._cursor_for(Qt.Edge.RightEdge | Qt.Edge.TopEdge) == Qt.CursorShape.SizeBDiagCursor
+    assert w._cursor_for(Qt.Edge(0)) is None
+
+
+def test_close_hides_and_keeps_geometry(qtbot):
+    w = _window(qtbot)
+    w.show()
+    qtbot.waitExposed(w)
+    w.move(120, 130)
+    geometry = w.geometry()
+    w.close()
+    assert not w.isVisible()
+    # Reopen: the first-show placement must not run again (geometry kept).
+    w.show()
+    assert w._placed
+    assert w.geometry() == geometry
+
+
+def test_manual_resize_fallback(qtbot):
+    w = _window(qtbot)
+    w.show()
+    qtbot.waitExposed(w)
+    w.resize(400, 300)
+    start = w.geometry()
+
+    grab = QPointF(399.0, 299.0)  # bottom-right band
+    press = QMouseEvent(
+        QEvent.Type.MouseButtonPress,
+        grab,
+        w.mapToGlobal(grab.toPoint()).toPointF(),
+        Qt.MouseButton.LeftButton,
+        Qt.MouseButton.LeftButton,
+        Qt.KeyboardModifier.NoModifier,
+    )
+    w.mousePressEvent(press)
+    if not w._manual_edges:
+        # The platform accepted startSystemResize; the manual path is not
+        # reachable here, and the press must not have moved the window.
+        assert w.geometry() == start
+        return
+
+    move_to = grab + QPointF(40.0, 25.0)
+    move = QMouseEvent(
+        QEvent.Type.MouseMove,
+        move_to,
+        w.mapToGlobal(move_to.toPoint()).toPointF(),
+        Qt.MouseButton.NoButton,
+        Qt.MouseButton.LeftButton,
+        Qt.KeyboardModifier.NoModifier,
+    )
+    w.mouseMoveEvent(move)
+    assert w.width() == start.width() + 40
+    assert w.height() == start.height() + 25
+
+    release = QMouseEvent(
+        QEvent.Type.MouseButtonRelease,
+        move_to,
+        w.mapToGlobal(move_to.toPoint()).toPointF(),
+        Qt.MouseButton.LeftButton,
+        Qt.MouseButton.NoButton,
+        Qt.KeyboardModifier.NoModifier,
+    )
+    w.mouseReleaseEvent(release)
+    assert not w._manual_edges
+
+
+def test_hover_sets_resize_cursor(qtbot):
+    w = _window(qtbot)
+    w.show()
+    qtbot.waitExposed(w)
+
+    def hover(pos):
+        w.mouseMoveEvent(
+            QMouseEvent(
+                QEvent.Type.MouseMove,
+                pos,
+                w.mapToGlobal(pos.toPoint()).toPointF(),
+                Qt.MouseButton.NoButton,
+                Qt.MouseButton.NoButton,
+                Qt.KeyboardModifier.NoModifier,
+            )
+        )
+
+    hover(QPointF(2.0, 150.0))
+    assert w.cursor().shape() == Qt.CursorShape.SizeHorCursor
+    hover(QPointF(200.0, 150.0))
+    assert w.cursor().shape() == Qt.CursorShape.ArrowCursor
+
+
+def test_dock_title_bar_buttons(qtbot):
+    dock = QDockWidget("Console Log")
+    qtbot.addWidget(dock)
+    opened = []
+    bar = DockTitleBar(dock, on_popout=lambda: opened.append(True))
+    dock.setTitleBarWidget(bar)
+    dock.show()
+    qtbot.waitExposed(dock)
+
+    qtbot.mouseClick(bar.popout_button, Qt.MouseButton.LeftButton)
+    assert opened == [True]
+    assert dock.isVisible()
+
+
+def test_manual_resize_from_top_left(qtbot):
+    w = _window(qtbot)
+    w.show()
+    qtbot.waitExposed(w)
+    w.resize(400, 300)
+    # Drive the manual path directly; whether startSystemResize is available
+    # is platform luck and the top/left arithmetic deserves coverage either way.
+    w._manual_edges = Qt.Edge.LeftEdge | Qt.Edge.TopEdge
+    w._press_global = w.mapToGlobal(QPoint(2, 2))
+    w._press_geom = w.geometry()
+    move_to = QPointF(2.0 + 30.0, 2.0 + 20.0)
+    w.mouseMoveEvent(
+        QMouseEvent(
+            QEvent.Type.MouseMove,
+            move_to,
+            w.mapToGlobal(move_to.toPoint()).toPointF(),
+            Qt.MouseButton.NoButton,
+            Qt.MouseButton.LeftButton,
+            Qt.KeyboardModifier.NoModifier,
+        )
+    )
+    assert w.width() == 400 - 30
+    assert w.height() == 300 - 20
+
+
+def test_paint_border_knob(qtbot, monkeypatch):
+    from PySide6.QtGui import QPixmap
+
+    from aare.gui.widgets import popout_window as mod
+
+    w = _window(qtbot)
+    # Default FRAME_L1_WIDTH "0px": render must take the paint-nothing path.
+    w.render(QPixmap(w.size()))
+    # With a visible level-1 border the painter path runs.
+    monkeypatch.setattr(mod, "FRAME_L1_WIDTH", "2px")
+    w.render(QPixmap(w.size()))
diff --git a/tests/unit/gui/test_tell_sample_panel.py b/tests/unit/gui/test_tell_sample_panel.py
new file mode 100644
index 00000000..c8882ad9
--- /dev/null
+++ b/tests/unit/gui/test_tell_sample_panel.py
@@ -0,0 +1,134 @@
+"""The combined sample dock: chip row filters the table by status, chips
+double as drop targets for queue/flag relabeling, and a pop-out panel shares
+the docked panel's model so both stay in sync without wiring."""
+
+import pytest
+from aarecommon.models.models import DewarAddress, SampleShortInfo, SampleShortInfoList
+
+from aare.gui.panels.tell_sample_panel import TellSamplePanel
+
+
+@pytest.fixture
+def samples():
+    return SampleShortInfoList(
+        s=[
+            SampleShortInfo(
+                db_id=i,
+                puck_name=f"P{i}",
+                dewar_name="D1",
+                sample_name=f"S{i}",
+                run_number=i,
+                user="U1",
+                pin=i,
+                location=DewarAddress(segment="A", pos=i),
+            )
+            for i in (1, 2, 3)
+        ]
+    )
+
+
+@pytest.fixture
+def panel(qtbot, samples):
+    panel = TellSamplePanel(samples=samples)
+    qtbot.addWidget(panel)
+    panel.table_model.set_show_all_pgroups(True)
+    return panel
+
+
+def _chip(panel, key):
+    return next(c for c in panel.status_chips.buttons() if c.property("status_key") == key)
+
+
+def test_chip_click_drives_the_status_filter(panel):
+    panel.table_model.set_queued_ids({2})
+    _chip(panel, "queued").click()
+    assert panel.table_model.status_filter == "queued"
+    assert panel.table_model.rowCount() == 1
+    _chip(panel, None).click()
+    assert panel.table_model.status_filter is None
+    assert panel.table_model.rowCount() == 3
+
+
+def test_set_status_chip_syncs_without_filtering(panel):
+    panel.set_status_chip("flagged")
+    assert _chip(panel, "flagged").isChecked()
+    # Sync only checks the chip; it must not fire the filter.
+    assert panel.table_model.status_filter is None
+
+
+def test_queued_chip_drop_relays_to_the_queue(panel, qtbot, samples):
+    chip = _chip(panel, "queued")
+    with qtbot.waitSignal(panel.add_to_queue) as blocker:
+        chip.samples_dropped.emit(samples)
+    assert [s.db_id for s in blocker.args[0].s] == [1, 2, 3]
+
+
+def test_flagged_chip_drop_flags_in_the_model(panel, samples):
+    panel._flag_dropped_samples(SampleShortInfoList(s=samples.s[:2]))
+    assert panel.table_model.flagged_ids == {1, 2}
+
+
+def test_popout_panel_shares_the_model(panel, qtbot):
+    popout = TellSamplePanel(model=panel.table_model)
+    qtbot.addWidget(popout)
+    assert popout.table_model is panel.table_model
+    panel.table_model.set_flagged(3, True)
+    assert 3 in popout.table_model.flagged_ids
+
+
+def test_new_sample_list_updates_rows(panel, samples):
+    extra = samples.s + [
+        SampleShortInfo(
+            db_id=9,
+            puck_name="P9",
+            dewar_name="D2",
+            sample_name="S9",
+            run_number=9,
+            user="U2",
+            pin=9,
+            location=DewarAddress(segment="B", pos=1),
+        )
+    ]
+    panel.new_sample_list(SampleShortInfoList(s=extra))
+    assert panel.table_model.rowCount() == 4
+
+
+def test_queue_drop_chip_accepts_sample_payloads(panel, qtbot, samples):
+    from PySide6.QtCore import QMimeData, QPointF, Qt
+    from PySide6.QtGui import QDropEvent
+
+    from aare.gui.panels.tell_sample_panel import QueueDropChip
+
+    chip = next(c for c in panel.status_chips.buttons() if isinstance(c, QueueDropChip))
+
+    # The event only borrows the QMimeData (C++ pointer), so the mime must
+    # outlive the dropEvent call — hence created in the test's scope.
+    def drop(mime):
+        return QDropEvent(
+            QPointF(1, 1),
+            Qt.DropAction.CopyAction,
+            mime,
+            Qt.MouseButton.NoButton,
+            Qt.KeyboardModifier.NoModifier,
+        )
+
+    good = QMimeData()
+    good.setText(samples.model_dump_json())
+    with qtbot.waitSignal(chip.samples_dropped):
+        chip.dropEvent(drop(good))
+
+    # A non-sample payload is ignored, not crashed on.
+    bad = QMimeData()
+    bad.setText("not json")
+    with qtbot.assertNotEmitted(chip.samples_dropped):
+        chip.dropEvent(drop(bad))
+
+
+def test_selected_samples_follow_the_click(panel):
+    view = panel.table_view
+    view.selectRow(0)
+    row_ids = [panel.table_model.get_id(r).db_id for r in range(3)]
+    # Click inside the selection: the selection is acted on.
+    assert [s.db_id for s in panel._selected_samples(0)] == [row_ids[0]]
+    # Click outside the selection: only the clicked row is acted on.
+    assert [s.db_id for s in panel._selected_samples(2)] == [row_ids[2]]
diff --git a/tests/unit/gui/test_wheel_value_guard.py b/tests/unit/gui/test_wheel_value_guard.py
new file mode 100644
index 00000000..68d760a9
--- /dev/null
+++ b/tests/unit/gui/test_wheel_value_guard.py
@@ -0,0 +1,74 @@
+"""The wheel guard is motor protection: a bare wheel over a value widget must
+never change the value (it scrolls the page instead); adjusting requires the
+deliberate right-button + wheel gesture."""
+
+import pytest
+from PySide6.QtCore import QPoint, QPointF, Qt
+from PySide6.QtGui import QWheelEvent
+from PySide6.QtWidgets import QApplication, QScrollArea, QSlider, QSpinBox, QVBoxLayout, QWidget
+
+from aare.gui.widgets.wheel_value_guard import WheelValueGuard
+
+
+@pytest.fixture
+def guard(qapp):
+    guard = WheelValueGuard()
+    qapp.installEventFilter(guard)
+    yield guard
+    qapp.removeEventFilter(guard)
+
+
+def _wheel(buttons):
+    return QWheelEvent(
+        QPointF(5, 5),
+        QPointF(5, 5),
+        QPoint(0, 0),
+        QPoint(0, 120),
+        buttons,
+        Qt.KeyboardModifier.NoModifier,
+        Qt.ScrollPhase.NoScrollPhase,
+        False,
+    )
+
+
+def test_bare_wheel_does_not_adjust(guard, qtbot):
+    slider = QSlider(Qt.Orientation.Horizontal)
+    qtbot.addWidget(slider)
+    slider.setRange(0, 100)
+    slider.setValue(50)
+    QApplication.sendEvent(slider, _wheel(Qt.MouseButton.NoButton))
+    assert slider.value() == 50
+
+
+def test_right_button_wheel_adjusts(guard, qtbot):
+    slider = QSlider(Qt.Orientation.Horizontal)
+    qtbot.addWidget(slider)
+    slider.setRange(0, 100)
+    slider.setValue(50)
+    QApplication.sendEvent(slider, _wheel(Qt.MouseButton.RightButton))
+    assert slider.value() != 50
+
+
+def test_bare_wheel_scrolls_the_enclosing_area(guard, qtbot):
+    area = QScrollArea()
+    qtbot.addWidget(area)
+    content = QWidget()
+    layout = QVBoxLayout(content)
+    spin = QSpinBox()
+    spin.setRange(0, 100)
+    spin.setValue(50)
+    layout.addWidget(spin)
+    # Tall filler so the area has something to scroll.
+    filler = QWidget()
+    filler.setFixedHeight(2000)
+    layout.addWidget(filler)
+    area.setWidget(content)
+    area.resize(200, 200)
+    area.show()
+    bar = area.verticalScrollBar()
+    bar.setValue(bar.maximum() // 2)
+    before = bar.value()
+
+    QApplication.sendEvent(spin, _wheel(Qt.MouseButton.NoButton))
+    assert spin.value() == 50
+    assert bar.value() != before