diff --git a/packages/button/src/LionButton.js b/packages/button/src/LionButton.js
index ef76bf78a..2795ec766 100644
--- a/packages/button/src/LionButton.js
+++ b/packages/button/src/LionButton.js
@@ -137,7 +137,7 @@ export class LionButton extends DisabledWithTabIndexMixin(SlotMixin(LitElement))
         if (!this.constructor._button) {
           this.constructor._button = document.createElement('button');
           this.constructor._button.setAttribute('tabindex', '-1');
-          this.constructor._button.setAttribute('aria-hidden', true);
+          this.constructor._button.setAttribute('aria-hidden', 'true');
         }
         return this.constructor._button.cloneNode();
       },
diff --git a/packages/button/test/lion-button.test.js b/packages/button/test/lion-button.test.js
index e75bd35fb..3010579b1 100644
--- a/packages/button/test/lion-button.test.js
+++ b/packages/button/test/lion-button.test.js
@@ -228,6 +228,16 @@ describe('lion-button', () => {
 
       expect(el._nativeButtonNode.getAttribute('aria-hidden')).to.equal('true');
     });
+
+    it('is accessible', async () => {
+      const el = await fixture(`<lion-button>foo</lion-button>`);
+      await expect(el).to.be.accessible();
+    });
+
+    it('is accessible when disabled', async () => {
+      const el = await fixture(`<lion-button disabled>foo</lion-button>`);
+      await expect(el).to.be.accessible();
+    });
   });
 
   describe('form integration', () => {
diff --git a/packages/calendar/test/lion-calendar.test.js b/packages/calendar/test/lion-calendar.test.js
index dfd711107..0e5018c69 100644
--- a/packages/calendar/test/lion-calendar.test.js
+++ b/packages/calendar/test/lion-calendar.test.js
@@ -1193,4 +1193,37 @@ describe('<lion-calendar>', () => {
        */
     });
   });
+
+  describe('Accessibility', () => {
+    it('is accessible', async () => {
+      const el = await fixture(
+        html`
+          <lion-calendar></lion-calendar>
+        `,
+      );
+      await expect(el).to.be.accessible();
+    });
+
+    it('is accessible with a date selected', async () => {
+      const today = new Date();
+      const selectedDate = new Date(today.getFullYear(), today.getMonth(), today.getDate() + 1);
+      const el = await fixture(
+        html`
+          <lion-calendar .selectedDate="${selectedDate}"></lion-calendar>
+        `,
+      );
+      await expect(el).to.be.accessible();
+    });
+
+    it('is accessible with disabled dates', async () => {
+      const el = await fixture(
+        html`
+          <lion-calendar
+            .disableDates=${day => day.getDay() === 6 || day.getDay() === 0}
+          ></lion-calendar>
+        `,
+      );
+      await expect(el).to.be.accessible();
+    });
+  });
 });
diff --git a/packages/checkbox-group/test/lion-checkbox-group.test.js b/packages/checkbox-group/test/lion-checkbox-group.test.js
index b1ba75abe..6e9f50cd1 100644
--- a/packages/checkbox-group/test/lion-checkbox-group.test.js
+++ b/packages/checkbox-group/test/lion-checkbox-group.test.js
@@ -25,4 +25,78 @@ describe('<lion-checkbox-group>', () => {
     el.formElements['sports[]'][0].checked = true;
     expect(el.hasFeedbackFor).to.deep.equal([]);
   });
+
+  it('is accessible', async () => {
+    const el = await fixture(html`
+      <lion-checkbox-group name="scientistsGroup" label="Who are your favorite scientists?">
+        <lion-checkbox
+          name="scientists[]"
+          label="Archimedes"
+          .choiceValue=${'Archimedes'}
+        ></lion-checkbox>
+        <lion-checkbox
+          name="scientists[]"
+          label="Francis Bacon"
+          .choiceValue=${'Francis Bacon'}
+        ></lion-checkbox>
+        <lion-checkbox
+          name="scientists[]"
+          label="Marie Curie"
+          .modelValue=${{ value: 'Marie Curie', checked: false }}
+        ></lion-checkbox>
+      </lion-checkbox-group>
+    `);
+    await expect(el).to.be.accessible();
+  });
+
+  it('is accessible when pre-selected', async () => {
+    const el = await fixture(html`
+      <lion-checkbox-group name="scientistsGroup" label="Who are your favorite scientists?">
+        <lion-checkbox
+          name="scientists[]"
+          label="Archimedes"
+          .choiceValue=${'Archimedes'}
+        ></lion-checkbox>
+        <lion-checkbox
+          name="scientists[]"
+          label="Francis Bacon"
+          .choiceValue=${'Francis Bacon'}
+          .choiceChecked=${true}
+        ></lion-checkbox>
+        <lion-checkbox
+          name="scientists[]"
+          label="Marie Curie"
+          .modelValue=${{ value: 'Marie Curie', checked: true }}
+        ></lion-checkbox>
+      </lion-checkbox-group>
+    `);
+    await expect(el).to.be.accessible();
+  });
+
+  it('is accessible when disabled', async () => {
+    const el = await fixture(html`
+      <lion-checkbox-group
+        name="scientistsGroup"
+        label="Who are your favorite scientists?"
+        disabled
+      >
+        <lion-checkbox
+          name="scientists[]"
+          label="Archimedes"
+          .choiceValue=${'Archimedes'}
+        ></lion-checkbox>
+        <lion-checkbox
+          name="scientists[]"
+          label="Francis Bacon"
+          .choiceValue=${'Francis Bacon'}
+        ></lion-checkbox>
+        <lion-checkbox
+          name="scientists[]"
+          label="Marie Curie"
+          .modelValue=${{ value: 'Marie Curie', checked: true }}
+        ></lion-checkbox>
+      </lion-checkbox-group>
+    `);
+    await expect(el).to.be.accessible();
+  });
 });
diff --git a/packages/icon/test/lion-icon.test.js b/packages/icon/test/lion-icon.test.js
index ffb51c680..00b09ae32 100644
--- a/packages/icon/test/lion-icon.test.js
+++ b/packages/icon/test/lion-icon.test.js
@@ -71,6 +71,24 @@ describe('lion-icon', () => {
     expect(el.hasAttribute('aria-label')).to.equal(false);
   });
 
+  it('is accessible with an aria label', async () => {
+    const el = await fixture(
+      html`
+        <lion-icon .svg=${heartSvg} aria-label="Love"></lion-icon>
+      `,
+    );
+    await expect(el).to.be.accessible();
+  });
+
+  it('is accessible without an aria label', async () => {
+    const el = await fixture(
+      html`
+        <lion-icon .svg=${heartSvg}></lion-icon>
+      `,
+    );
+    await expect(el).to.be.accessible();
+  });
+
   it('expects svg-icons to have the attribute `focusable="false"` so the icon doesn\'t appear in tab-order in IE/Edge', async () => {
     const icon = await fixture(
       html`
diff --git a/packages/input-amount/test/lion-input-amount.test.js b/packages/input-amount/test/lion-input-amount.test.js
index 03ea82489..ca7484c3c 100644
--- a/packages/input-amount/test/lion-input-amount.test.js
+++ b/packages/input-amount/test/lion-input-amount.test.js
@@ -118,4 +118,25 @@ describe('<lion-input-amount>', () => {
       expect(el._currencyDisplayNode.getAttribute('aria-label')).to.equal('Philippine pisos');
     });
   });
+
+  it('is accessible', async () => {
+    const el = await fixture(
+      `<lion-input-amount><label slot="label">Label</label></lion-input-amount>`,
+    );
+    await expect(el).to.be.accessible();
+  });
+
+  it('is accessible when readonly', async () => {
+    const el = await fixture(
+      `<lion-input-amount readonly .modelValue=${'123'}><label slot="label">Label</label></lion-input-amount>`,
+    );
+    await expect(el).to.be.accessible();
+  });
+
+  it('is accessible when disabled', async () => {
+    const el = await fixture(
+      `<lion-input-amount disabled><label slot="label">Label</label></lion-input-amount>`,
+    );
+    await expect(el).to.be.accessible();
+  });
 });
diff --git a/packages/input-date/test/lion-input-date.test.js b/packages/input-date/test/lion-input-date.test.js
index 2950239ae..1b511bc9d 100644
--- a/packages/input-date/test/lion-input-date.test.js
+++ b/packages/input-date/test/lion-input-date.test.js
@@ -96,4 +96,27 @@ describe('<lion-input-date>', () => {
     await el.updateComplete;
     expect(el.formattedValue).to.equal('15/06/2017'); // should stay british
   });
+
+  it('is accessible', async () => {
+    const el = await fixture(
+      `<lion-input-date><label slot="label">Label</label></lion-input-date>`,
+    );
+    await expect(el).to.be.accessible();
+  });
+
+  it('is accessible when readonly', async () => {
+    const el = await fixture(
+      `<lion-input-date readonly .modelValue=${new Date(
+        '2017/06/15',
+      )}><label slot="label">Label</label></lion-input-date>`,
+    );
+    await expect(el).to.be.accessible();
+  });
+
+  it('is accessible when disabled', async () => {
+    const el = await fixture(
+      `<lion-input-date disabled><label slot="label">Label</label></lion-input-date>`,
+    );
+    await expect(el).to.be.accessible();
+  });
 });
diff --git a/packages/input-datepicker/test/lion-input-datepicker.test.js b/packages/input-datepicker/test/lion-input-datepicker.test.js
index 81fc20e05..070a368a7 100644
--- a/packages/input-datepicker/test/lion-input-datepicker.test.js
+++ b/packages/input-datepicker/test/lion-input-datepicker.test.js
@@ -301,6 +301,50 @@ describe('<lion-input-datepicker>', () => {
       await elObj.closeCalendar();
       expect(elObj.invokerEl.getAttribute('aria-expanded')).to.equal('false');
     });
+
+    it('is accessible when closed', async () => {
+      const el = await fixture(html`
+        <lion-input-datepicker></lion-input-datepicker>
+      `);
+      const elObj = new DatepickerInputObject(el);
+
+      await expect(elObj.invokerEl).to.be.accessible();
+      await expect(elObj.calendarEl).to.be.accessible();
+    });
+
+    it('is accessible when open', async () => {
+      const el = await fixture(html`
+        <lion-input-datepicker></lion-input-datepicker>
+      `);
+      const elObj = new DatepickerInputObject(el);
+      await elObj.openCalendar();
+
+      await expect(elObj.calendarEl).to.be.accessible();
+      elObj.overlayCloseButtonEl.click();
+    });
+
+    it('has accessible invoker when open', async () => {
+      const el = await fixture(html`
+        <lion-input-datepicker></lion-input-datepicker>
+      `);
+      const elObj = new DatepickerInputObject(el);
+      await elObj.openCalendar();
+
+      await expect(elObj.invokerEl).to.be.accessible();
+      elObj.overlayCloseButtonEl.click();
+    });
+
+    it('is accessible with a disabled date', async () => {
+      const no15th = d => d.getDate() !== 15;
+      const el = await fixture(html`
+        <lion-input-datepicker .validators=${[new IsDateDisabled(no15th)]}> </lion-input-datepicker>
+      `);
+      const elObj = new DatepickerInputObject(el);
+      await elObj.openCalendar();
+
+      await expect(elObj.calendarEl).to.be.accessible();
+      elObj.overlayCloseButtonEl.click();
+    });
   });
 
   describe.skip('Subclassers', () => {
diff --git a/packages/input-email/test/lion-input-email.test.js b/packages/input-email/test/lion-input-email.test.js
index 0a9d37b59..2b9bdd845 100644
--- a/packages/input-email/test/lion-input-email.test.js
+++ b/packages/input-email/test/lion-input-email.test.js
@@ -15,4 +15,25 @@ describe('<lion-input-email>', () => {
     expect(el.hasFeedbackFor).to.deep.equal(['error']);
     expect(el.validationStates.error.IsEmail).to.be.true;
   });
+
+  it('is accessible', async () => {
+    const lionInputEmail = await fixture(
+      `<lion-input-email><label slot="label">Label</label></lion-input-email>`,
+    );
+    await expect(lionInputEmail).to.be.accessible();
+  });
+
+  it('is accessible when readonly', async () => {
+    const lionInputEmail = await fixture(
+      `<lion-input-email readonly><label slot="label">Label</label></lion-input-email>`,
+    );
+    await expect(lionInputEmail).to.be.accessible();
+  });
+
+  it('is accessible when disabled', async () => {
+    const lionInputEmail = await fixture(
+      `<lion-input-email disabled><label slot="label">Label</label></lion-input-email>`,
+    );
+    await expect(lionInputEmail).to.be.accessible();
+  });
 });
diff --git a/packages/input-iban/test/lion-input-iban.test.js b/packages/input-iban/test/lion-input-iban.test.js
index 63a2ea492..6268d08e2 100644
--- a/packages/input-iban/test/lion-input-iban.test.js
+++ b/packages/input-iban/test/lion-input-iban.test.js
@@ -53,4 +53,25 @@ describe('<lion-input-iban>', () => {
     expect(el.validationStates.error).to.have.a.property('IsIBAN');
     expect(el.validationStates.error).to.have.a.property('IsCountryIBAN');
   });
+
+  it('is accessible', async () => {
+    const el = await fixture(
+      `<lion-input-iban><label slot="label">Label</label></lion-input-iban>`,
+    );
+    await expect(el).to.be.accessible();
+  });
+
+  it('is accessible when readonly', async () => {
+    const el = await fixture(
+      `<lion-input-iban readonly><label slot="label">Label</label></lion-input-iban>`,
+    );
+    await expect(el).to.be.accessible();
+  });
+
+  it('is accessible when disabled', async () => {
+    const el = await fixture(
+      `<lion-input-iban disabled><label slot="label">Label</label></lion-input-iban>`,
+    );
+    await expect(el).to.be.accessible();
+  });
 });
diff --git a/packages/input/test/lion-input.test.js b/packages/input/test/lion-input.test.js
index 9a1f74836..faa0d247f 100644
--- a/packages/input/test/lion-input.test.js
+++ b/packages/input/test/lion-input.test.js
@@ -41,4 +41,21 @@ describe('<lion-input>', () => {
     expect(el.getAttribute('placeholder')).to.equal('foo');
     expect(el._inputNode.getAttribute('placeholder')).to.equal('foo');
   });
+
+  it('is accessible', async () => {
+    const el = await fixture(`<lion-input><label slot="label">Label</label></lion-input>`);
+    await expect(el).to.be.accessible();
+  });
+
+  it('is accessible when readonly', async () => {
+    const el = await fixture(
+      `<lion-input readonly .modelValue=${'read only'}><label slot="label">Label</label></lion-input>`,
+    );
+    await expect(el).to.be.accessible();
+  });
+
+  it('is accessible when disabled', async () => {
+    const el = await fixture(`<lion-input disabled><label slot="label">Label</label></lion-input>`);
+    await expect(el).to.be.accessible();
+  });
 });
diff --git a/packages/overlays/src/OverlayController.js b/packages/overlays/src/OverlayController.js
index 1ba08b842..44059d55a 100644
--- a/packages/overlays/src/OverlayController.js
+++ b/packages/overlays/src/OverlayController.js
@@ -221,7 +221,7 @@ export class OverlayController {
       if (this.invokerNode) {
         this.invokerNode.setAttribute('aria-expanded', this.isShown);
       }
-      if (!this.contentNode.hasAttribute('role')) {
+      if (!this.contentNode.role) {
         this.contentNode.setAttribute('role', 'dialog');
       }
     }
diff --git a/packages/radio-group/test/lion-radio-group.test.js b/packages/radio-group/test/lion-radio-group.test.js
index e979edac3..da6d6392d 100644
--- a/packages/radio-group/test/lion-radio-group.test.js
+++ b/packages/radio-group/test/lion-radio-group.test.js
@@ -265,4 +265,52 @@ describe('<lion-radio-group>', () => {
     el.children[1].checked = true;
     expect(el.touched, `focused via a mouse click, group should be touched`).to.be.true;
   });
+
+  it('is accessible', async () => {
+    const el = await fixture(html`
+      <lion-radio-group>
+        <label slot="label">My group</label>
+        <lion-radio name="gender[]" value="male">
+          <label slot="label">male</label>
+        </lion-radio>
+        <lion-radio name="gender[]" value="female" checked>
+          <label slot="label">female</label>
+        </lion-radio>
+      </lion-radio-group>
+    `);
+    await nextFrame();
+    await expect(el).to.be.accessible();
+  });
+
+  it('is accessible when the group is disabled', async () => {
+    const el = await fixture(html`
+      <lion-radio-group disabled>
+        <label slot="label">My group</label>
+        <lion-radio name="gender[]" value="male">
+          <label slot="label">male</label>
+        </lion-radio>
+        <lion-radio name="gender[]" value="female">
+          <label slot="label">female</label>
+        </lion-radio>
+      </lion-radio-group>
+    `);
+    await nextFrame();
+    await expect(el).to.be.accessible();
+  });
+
+  it('is accessible when an option is disabled', async () => {
+    const el = await fixture(html`
+      <lion-radio-group>
+        <label slot="label">My group</label>
+        <lion-radio name="gender[]" value="male" disabled>
+          <label slot="label">male</label>
+        </lion-radio>
+        <lion-radio name="gender[]" value="female">
+          <label slot="label">female</label>
+        </lion-radio>
+      </lion-radio-group>
+    `);
+    await nextFrame();
+    await expect(el).to.be.accessible();
+  });
 });
diff --git a/packages/select-rich/test/lion-select-rich.test.js b/packages/select-rich/test/lion-select-rich.test.js
index 9485beb16..f680c3e68 100644
--- a/packages/select-rich/test/lion-select-rich.test.js
+++ b/packages/select-rich/test/lion-select-rich.test.js
@@ -400,6 +400,34 @@ describe('lion-select-rich', () => {
 
       expect(el._invokerNode.getAttribute('aria-expanded')).to.equal('true');
     });
+
+    it('is accessible when closed', async () => {
+      const el = await fixture(html`
+        <lion-select-rich label="age">
+          <lion-options slot="input">
+            <lion-option .choiceValue=${10}>Item 1</lion-option>
+            <lion-option .choiceValue=${20}>Item 2</lion-option>
+          </lion-options>
+        </lion-select-rich>
+      `);
+      await expect(el).to.be.accessible();
+    });
+
+    it('is accessible when opened', async () => {
+      const el = await fixture(html`
+        <lion-select-rich label="age">
+          <lion-options slot="input">
+            <lion-option .choiceValue=${10}>Item 1</lion-option>
+            <lion-option .choiceValue=${20}>Item 2</lion-option>
+          </lion-options>
+        </lion-select-rich>
+      `);
+      el.opened = true;
+      await el.updateComplete;
+      await el.updateComplete; // need 2 awaits as overlay.show is an async function
+
+      await expect(el).to.be.accessible();
+    });
   });
 
   describe('Use cases', () => {
diff --git a/packages/select/test/lion-select.test.js b/packages/select/test/lion-select.test.js
index aa6379e08..7048fcae9 100644
--- a/packages/select/test/lion-select.test.js
+++ b/packages/select/test/lion-select.test.js
@@ -15,4 +15,17 @@ describe('lion-select', () => {
     `);
     expect(lionSelect.querySelector('select').value).to.equal('nr2');
   });
+
+  it('is accessible', async () => {
+    const lionSelect = await fixture(html`
+      <lion-select .modelValue="${'nr2'}">
+        <label slot="label">Label</label>
+        <select slot="input">
+          <option value="nr1">Item 1</option>
+          <option value="nr2">Item 2</option>
+        </select>
+      </lion-select>
+    `);
+    await expect(lionSelect).to.be.accessible();
+  });
 });
diff --git a/packages/textarea/test/lion-textarea.test.js b/packages/textarea/test/lion-textarea.test.js
index 72e244c46..71370f8a2 100644
--- a/packages/textarea/test/lion-textarea.test.js
+++ b/packages/textarea/test/lion-textarea.test.js
@@ -139,4 +139,14 @@ describe('<lion-textarea>', () => {
       .to.be.below(el.clientHeight)
       .and.to.be.below(el.scrollHeight);
   });
+
+  it('is accessible', async () => {
+    const el = await fixture(`<lion-textarea label="Label"></lion-textarea>`);
+    await expect(el).to.be.accessible();
+  });
+
+  it('is accessible when disabled', async () => {
+    const el = await fixture(`<lion-textarea label="Label" disabled></lion-textarea>`);
+    await expect(el).to.be.accessible();
+  });
 });
diff --git a/packages/tooltip/test/lion-tooltip.test.js b/packages/tooltip/test/lion-tooltip.test.js
index 5d61bd42f..4bb69e256 100644
--- a/packages/tooltip/test/lion-tooltip.test.js
+++ b/packages/tooltip/test/lion-tooltip.test.js
@@ -117,5 +117,30 @@ describe('lion-tooltip', () => {
       const content = el.querySelector('[slot=content]');
       expect(content.getAttribute('role')).to.be.equal('tooltip');
     });
+
+    it('should be accessible when closed', async () => {
+      const el = await fixture(html`
+        <lion-tooltip>
+          <div slot="content">Hey there</div>
+          <lion-button slot="invoker">Tooltip button</lion-button>
+        </lion-tooltip>
+      `);
+      await expect(el).to.be.accessible;
+    });
+
+    it('should be accessible when opened', async () => {
+      const el = await fixture(html`
+        <lion-tooltip>
+          <div slot="content">Hey there</div>
+          <lion-button slot="invoker">Tooltip button</lion-button>
+        </lion-tooltip>
+      `);
+      const invoker = el.querySelector('[slot="invoker"]');
+      const eventFocusIn = new Event('focusin');
+      invoker.dispatchEvent(eventFocusIn);
+      await el.updateComplete;
+
+      await expect(el).to.be.accessible;
+    });
   });
 });