diff --git a/client/src/components/Planner/DayPlanSidebar.test.tsx b/client/src/components/Planner/DayPlanSidebar.test.tsx
index 07125d9e..fb0d1187 100644
--- a/client/src/components/Planner/DayPlanSidebar.test.tsx
+++ b/client/src/components/Planner/DayPlanSidebar.test.tsx
@@ -187,7 +187,7 @@ describe('DayPlanSidebar', () => {
     const assignments = { '10': [assignment] }
     render(<DayPlanSidebar {...makeDefaultProps({ days: [day], places: [place], assignments })} />)
     // The chevron button immediately follows the "Add Note" button (which has a title attribute)
-    const addNoteBtn = screen.getByTitle('Add Note')
+    const addNoteBtn = screen.getByLabelText('Add Note')
     const chevron = addNoteBtn.nextElementSibling as HTMLButtonElement
     expect(chevron).toBeTruthy()
     await user.click(chevron)
@@ -201,7 +201,7 @@ describe('DayPlanSidebar', () => {
     const assignment = buildAssignment({ id: 99, day_id: 10, order_index: 0, place })
     const assignments = { '10': [assignment] }
     render(<DayPlanSidebar {...makeDefaultProps({ days: [day], places: [place], assignments })} />)
-    const getChevron = () => screen.getByTitle('Add Note').nextElementSibling as HTMLButtonElement
+    const getChevron = () => screen.getByLabelText('Add Note').nextElementSibling as HTMLButtonElement
     await user.click(getChevron()) // collapse
     expect(screen.queryByText('Eiffel Tower')).not.toBeInTheDocument()
     await user.click(getChevron()) // re-expand
@@ -362,28 +362,14 @@ describe('DayPlanSidebar', () => {
     const user = userEvent.setup()
     const onUndo = vi.fn()
     render(<DayPlanSidebar {...makeDefaultProps({ canUndo: true, lastActionLabel: 'Removed place', onUndo })} />)
-    // Find the undo button — it has width 30, height 30 and is not disabled
-    const buttons = screen.getAllByRole('button')
-    // The undo button is the one with the Undo2 icon and is not disabled
-    const undoBtn = buttons.find(btn => {
-      const style = btn.getAttribute('style') || ''
-      return style.includes('width: 30px') || style.includes('width:30px') || (style.includes('30') && !btn.disabled)
-    })
-    if (undoBtn) {
-      await user.click(undoBtn)
-      expect(onUndo).toHaveBeenCalled()
-    }
+    const undoBtn = screen.getByLabelText('Undo')
+    await user.click(undoBtn)
+    expect(onUndo).toHaveBeenCalled()
   })
 
   it('FE-PLANNER-DAYPLAN-024: undo button not present when onUndo not provided', () => {
     render(<DayPlanSidebar {...makeDefaultProps({ canUndo: false })} />)
-    // When onUndo is not provided, the undo section is not rendered at all
-    const buttons = screen.getAllByRole('button')
-    const undoBtn = buttons.find(btn => {
-      const style = btn.getAttribute('style') || ''
-      return style.includes('width: 30px')
-    })
-    expect(undoBtn).toBeUndefined()
+    expect(screen.queryByLabelText('Undo')).toBeNull()
   })
 
   // ── PDF export ──────────────────────────────────────────────────────────
@@ -931,7 +917,7 @@ describe('DayPlanSidebar', () => {
     const user = userEvent.setup()
     const day = buildDay({ id: 10, date: '2025-06-01', title: 'Day 1' })
     render(<DayPlanSidebar {...makeDefaultProps({ days: [day] })} />)
-    const addNoteBtn = screen.getByTitle('Add Note')
+    const addNoteBtn = screen.getByLabelText('Add Note')
     await user.click(addNoteBtn)
     expect(mockDayNotesState.openAddNote).toHaveBeenCalled()
   })
diff --git a/client/src/components/Planner/DayPlanSidebar.tsx b/client/src/components/Planner/DayPlanSidebar.tsx
index a9c99e40..7a100c09 100644
--- a/client/src/components/Planner/DayPlanSidebar.tsx
+++ b/client/src/components/Planner/DayPlanSidebar.tsx
@@ -1074,6 +1074,7 @@ const DayPlanSidebar = React.memo(function DayPlanSidebar({
               <button
                 onClick={onUndo}
                 disabled={!canUndo}
+                aria-label={t('undo.button')}
                 onMouseEnter={() => setUndoHover(true)}
                 onMouseLeave={() => setUndoHover(false)}
                 style={{
diff --git a/client/src/components/Planner/PlacesSidebar.test.tsx b/client/src/components/Planner/PlacesSidebar.test.tsx
index 7d7221da..adb2881d 100644
--- a/client/src/components/Planner/PlacesSidebar.test.tsx
+++ b/client/src/components/Planner/PlacesSidebar.test.tsx
@@ -195,7 +195,7 @@ describe('Filter tabs', () => {
     const assignments = { '1': [buildAssignment({ place: planned, day_id: 1 })] };
     render(<PlacesSidebar {...defaultProps} places={[planned, unplanned]} assignments={assignments} />);
     await user.click(screen.getByRole('button', { name: /Unplanned/i }));
-    await user.click(screen.getByRole('button', { name: /^All$/i }));
+    await user.click(screen.getByRole('button', { name: /^All/i }));
     expect(screen.getByText('Planned Place')).toBeInTheDocument();
     expect(screen.getByText('Unplanned Place')).toBeInTheDocument();
   });
diff --git a/client/src/components/Settings/DisplaySettingsTab.test.tsx b/client/src/components/Settings/DisplaySettingsTab.test.tsx
index bf2dd919..4c770e6c 100644
--- a/client/src/components/Settings/DisplaySettingsTab.test.tsx
+++ b/client/src/components/Settings/DisplaySettingsTab.test.tsx
@@ -42,7 +42,7 @@ describe('DisplaySettingsTab', () => {
 
   it('FE-COMP-DISPLAY-005: shows Auto mode button', () => {
     render(<DisplaySettingsTab />);
-    expect(screen.getByText('Auto')).toBeInTheDocument();
+    expect(screen.getByRole('button', { name: /Auto/i })).toBeInTheDocument();
   });
 
   it('FE-COMP-DISPLAY-006: shows Language section', () => {
@@ -95,16 +95,16 @@ describe('DisplaySettingsTab', () => {
     const updateSetting = vi.fn().mockResolvedValue(undefined);
     seedStore(useSettingsStore, { settings: buildSettings({ dark_mode: 'light' }), updateSetting });
     render(<DisplaySettingsTab />);
-    await user.click(screen.getByText('Auto'));
+    await user.click(screen.getByRole('button', { name: /Auto/i }));
     expect(updateSetting).toHaveBeenCalledWith('dark_mode', 'auto');
   });
 
   it('FE-COMP-DISPLAY-014: active color mode button has border with var(--text-primary)', () => {
     seedStore(useSettingsStore, { settings: buildSettings({ dark_mode: 'dark' }) });
     render(<DisplaySettingsTab />);
-    const darkBtn = screen.getByText('Dark').closest('button')!;
-    const lightBtn = screen.getByText('Light').closest('button')!;
-    const autoBtn = screen.getByText('Auto').closest('button')!;
+    const darkBtn = screen.getByRole('button', { name: /^Dark$/i });
+    const lightBtn = screen.getByRole('button', { name: /^Light$/i });
+    const autoBtn = screen.getByRole('button', { name: /Auto/i });
     expect(darkBtn.style.border).toContain('var(--text-primary)');
     expect(lightBtn.style.border).toContain('var(--border-primary)');
     expect(autoBtn.style.border).toContain('var(--border-primary)');
@@ -122,8 +122,11 @@ describe('DisplaySettingsTab', () => {
   it('FE-COMP-DISPLAY-016: active language button is visually highlighted', () => {
     seedStore(useSettingsStore, { settings: buildSettings({ language: 'en' }) });
     render(<DisplaySettingsTab />);
-    const englishBtn = screen.getByText('English').closest('button')!;
-    expect(englishBtn.style.border).toContain('var(--text-primary)');
+    // Multiple elements contain "English" (desktop grid button + mobile dropdown trigger).
+    // The desktop grid button is the one with the active border style.
+    const englishMatches = screen.getAllByText('English').map(el => el.closest('button')!).filter(Boolean);
+    const activeBtn = englishMatches.find(btn => (btn.style.border || '').includes('var(--text-primary)'));
+    expect(activeBtn).toBeDefined();
   });
 
   it('FE-COMP-DISPLAY-017: shows Temperature section label', () => {
diff --git a/server/tests/unit/services/weatherService.test.ts b/server/tests/unit/services/weatherService.test.ts
index bf4258d2..474b9e40 100644
--- a/server/tests/unit/services/weatherService.test.ts
+++ b/server/tests/unit/services/weatherService.test.ts
@@ -282,13 +282,36 @@ describe('getWeather', () => {
   });
 
   describe('with date — past date (diffDays < -1)', () => {
-    it('returns no_forecast error immediately without fetching', async () => {
+    it('returns forecast-type WeatherResult from the archive API', async () => {
       const date = dateOffset(-5); // 5 days in the past
+      const archiveBody = {
+        daily: {
+          time: [date],
+          temperature_2m_max: [18],
+          temperature_2m_min: [10],
+          weathercode: [2],
+          precipitation_sum: [0],
+        },
+      };
+      vi.mocked(fetch).mockResolvedValueOnce(mockResponse(archiveBody));
 
       const result = await getWeather('14.00', '24.00', date, 'en');
 
+      expect(result.type).toBe('forecast');
+      expect(result.temp).toBe(14);
+      expect(result.temp_max).toBe(18);
+      expect(result.temp_min).toBe(10);
+      expect(fetch).toHaveBeenCalledTimes(1);
+      expect(vi.mocked(fetch).mock.calls[0][0]).toContain('archive-api.open-meteo.com');
+    });
+
+    it('returns no_forecast error when archive has no data for the date', async () => {
+      const date = dateOffset(-5);
+      vi.mocked(fetch).mockResolvedValueOnce(mockResponse({ daily: { time: [], temperature_2m_max: [], temperature_2m_min: [], weathercode: [] } }));
+
+      const result = await getWeather('14.01', '24.01', date, 'en');
+
       expect(result.error).toBe('no_forecast');
-      expect(fetch).not.toHaveBeenCalled();
     });
   });