diff --git a/js/tests/unit/dropdown.spec.js b/js/tests/unit/dropdown.spec.js
index 7491e38c0..2762ad21b 100644
--- a/js/tests/unit/dropdown.spec.js
+++ b/js/tests/unit/dropdown.spec.js
@@ -39,7 +39,7 @@ describe('Dropdown', () => {
     it('should create offset modifier correctly when offset option is a function', () => {
       fixtureEl.innerHTML = [
         '<div class="dropdown">',
-        '  <button href="#" class="btn dropdown-toggle" data-toggle="dropdown">Dropdown</button>',
+        '  <button class="btn dropdown-toggle" data-toggle="dropdown">Dropdown</button>',
         '  <div class="dropdown-menu">',
         '    <a class="dropdown-item" href="#">Secondary link</a>',
         '  </div>',
@@ -61,7 +61,7 @@ describe('Dropdown', () => {
     it('should create offset modifier correctly when offset option is not a function', () => {
       fixtureEl.innerHTML = [
         '<div class="dropdown">',
-        '  <button href="#" class="btn dropdown-toggle" data-toggle="dropdown">Dropdown</button>',
+        '  <button class="btn dropdown-toggle" data-toggle="dropdown">Dropdown</button>',
         '  <div class="dropdown-menu">',
         '    <a class="dropdown-item" href="#">Secondary link</a>',
         '  </div>',
@@ -83,7 +83,7 @@ describe('Dropdown', () => {
     it('should add a listener on trigger which do not have data-toggle="dropdown"', () => {
       fixtureEl.innerHTML = [
         '<div class="dropdown">',
-        '  <button href="#" class="btn">Dropdown</button>',
+        '  <button class="btn">Dropdown</button>',
         '  <div class="dropdown-menu">',
         '    <a class="dropdown-item" href="#">Secondary link</a>',
         '  </div>',
@@ -103,7 +103,7 @@ describe('Dropdown', () => {
     it('should allow to pass config to popper.js with `popperConfig`', () => {
       fixtureEl.innerHTML = [
         '<div class="dropdown">',
-        '  <button href="#" class="btn dropdown-toggle" data-toggle="dropdown">Dropdown</button>',
+        '  <button class="btn dropdown-toggle" data-toggle="dropdown">Dropdown</button>',
         '  <div class="dropdown-menu">',
         '    <a class="dropdown-item" href="#">Secondary link</a>',
         '  </div>',
@@ -127,7 +127,7 @@ describe('Dropdown', () => {
     it('should toggle a dropdown', done => {
       fixtureEl.innerHTML = [
         '<div class="dropdown">',
-        '  <button href="#" class="btn dropdown-toggle" data-toggle="dropdown" aria-expanded="false">Dropdown</button>',
+        '  <button class="btn dropdown-toggle" data-toggle="dropdown" aria-expanded="false">Dropdown</button>',
         '  <div class="dropdown-menu">',
         '    <a class="dropdown-item" href="#">Secondary link</a>',
         '  </div>',
@@ -150,13 +150,13 @@ describe('Dropdown', () => {
     it('should destroy old popper references on toggle', done => {
       fixtureEl.innerHTML = [
         '<div class="first dropdown">',
-        '  <button href="#" class="firstBtn btn" data-toggle="dropdown" aria-expanded="false">Dropdown</button>',
+        '  <button class="firstBtn btn" data-toggle="dropdown" aria-expanded="false">Dropdown</button>',
         '  <div class="dropdown-menu">',
         '    <a class="dropdown-item" href="#">Secondary link</a>',
         '  </div>',
         '</div>',
         '<div class="second dropdown">',
-        '  <button href="#" class="secondBtn btn" data-toggle="dropdown" aria-expanded="false">Dropdown</button>',
+        '  <button class="secondBtn btn" data-toggle="dropdown" aria-expanded="false">Dropdown</button>',
         '  <div class="dropdown-menu">',
         '    <a class="dropdown-item" href="#">Secondary link</a>',
         '  </div>',
@@ -187,7 +187,7 @@ describe('Dropdown', () => {
     it('should toggle a dropdown and add/remove event listener on mobile', done => {
       fixtureEl.innerHTML = [
         '<div class="dropdown">',
-        '  <button href="#" class="btn dropdown-toggle" data-toggle="dropdown" aria-expanded="false">Dropdown</button>',
+        '  <button class="btn dropdown-toggle" data-toggle="dropdown" aria-expanded="false">Dropdown</button>',
         '  <div class="dropdown-menu">',
         '    <a class="dropdown-item" href="#">Secondary link</a>',
         '  </div>',
@@ -226,7 +226,7 @@ describe('Dropdown', () => {
     it('should toggle a dropdown at the right', done => {
       fixtureEl.innerHTML = [
         '<div class="dropdown">',
-        '  <button href="#" class="btn dropdown-toggle" data-toggle="dropdown" aria-expanded="false">Dropdown</button>',
+        '  <button class="btn dropdown-toggle" data-toggle="dropdown" aria-expanded="false">Dropdown</button>',
         '  <div class="dropdown-menu dropdown-menu-right">',
         '    <a class="dropdown-item" href="#">Secondary link</a>',
         '  </div>',
@@ -249,7 +249,7 @@ describe('Dropdown', () => {
     it('should toggle a dropup', done => {
       fixtureEl.innerHTML = [
         '<div class="dropup">',
-        '  <button href="#" class="btn dropdown-toggle" data-toggle="dropdown" aria-expanded="false">Dropdown</button>',
+        '  <button class="btn dropdown-toggle" data-toggle="dropdown" aria-expanded="false">Dropdown</button>',
         '  <div class="dropdown-menu">',
         '    <a class="dropdown-item" href="#">Secondary link</a>',
         '  </div>',
@@ -272,7 +272,7 @@ describe('Dropdown', () => {
     it('should toggle a dropup at the right', done => {
       fixtureEl.innerHTML = [
         '<div class="dropup">',
-        '  <button href="#" class="btn dropdown-toggle" data-toggle="dropdown" aria-expanded="false">Dropdown</button>',
+        '  <button class="btn dropdown-toggle" data-toggle="dropdown" aria-expanded="false">Dropdown</button>',
         '  <div class="dropdown-menu dropdown-menu-right">',
         '    <a class="dropdown-item" href="#">Secondary link</a>',
         '  </div>',
@@ -295,7 +295,7 @@ describe('Dropdown', () => {
     it('should toggle a dropright', done => {
       fixtureEl.innerHTML = [
         '<div class="dropright">',
-        '  <button href="#" class="btn dropdown-toggle" data-toggle="dropdown" aria-expanded="false">Dropdown</button>',
+        '  <button class="btn dropdown-toggle" data-toggle="dropdown" aria-expanded="false">Dropdown</button>',
         '  <div class="dropdown-menu">',
         '    <a class="dropdown-item" href="#">Secondary link</a>',
         '  </div>',
@@ -318,7 +318,7 @@ describe('Dropdown', () => {
     it('should toggle a dropleft', done => {
       fixtureEl.innerHTML = [
         '<div class="dropleft">',
-        '  <button href="#" class="btn dropdown-toggle" data-toggle="dropdown" aria-expanded="false">Dropdown</button>',
+        '  <button class="btn dropdown-toggle" data-toggle="dropdown" aria-expanded="false">Dropdown</button>',
         '  <div class="dropdown-menu">',
         '    <a class="dropdown-item" href="#">Secondary link</a>',
         '  </div>',
@@ -341,7 +341,7 @@ describe('Dropdown', () => {
     it('should toggle a dropdown with parent reference', done => {
       fixtureEl.innerHTML = [
         '<div class="dropdown">',
-        '  <button href="#" class="btn dropdown-toggle" data-toggle="dropdown" aria-expanded="false">Dropdown</button>',
+        '  <button class="btn dropdown-toggle" data-toggle="dropdown" aria-expanded="false">Dropdown</button>',
         '  <div class="dropdown-menu">',
         '    <a class="dropdown-item" href="#">Secondary link</a>',
         '  </div>',
@@ -366,7 +366,7 @@ describe('Dropdown', () => {
     it('should toggle a dropdown with a dom node reference', done => {
       fixtureEl.innerHTML = [
         '<div class="dropdown">',
-        '  <button href="#" class="btn dropdown-toggle" data-toggle="dropdown" aria-expanded="false">Dropdown</button>',
+        '  <button class="btn dropdown-toggle" data-toggle="dropdown" aria-expanded="false">Dropdown</button>',
         '  <div class="dropdown-menu">',
         '    <a class="dropdown-item" href="#">Secondary link</a>',
         '  </div>',
@@ -391,7 +391,7 @@ describe('Dropdown', () => {
     it('should toggle a dropdown with a jquery object reference', done => {
       fixtureEl.innerHTML = [
         '<div class="dropdown">',
-        '  <button href="#" class="btn dropdown-toggle" data-toggle="dropdown" aria-expanded="false">Dropdown</button>',
+        '  <button class="btn dropdown-toggle" data-toggle="dropdown" aria-expanded="false">Dropdown</button>',
         '  <div class="dropdown-menu">',
         '    <a class="dropdown-item" href="#">Secondary link</a>',
         '  </div>',
@@ -416,7 +416,7 @@ describe('Dropdown', () => {
     it('should not toggle a dropdown if the element is disabled', done => {
       fixtureEl.innerHTML = [
         '<div class="dropdown">',
-        '  <button disabled href="#" class="btn dropdown-toggle" data-toggle="dropdown">Dropdown</button>',
+        '  <button disabled class="btn dropdown-toggle" data-toggle="dropdown">Dropdown</button>',
         '  <div class="dropdown-menu">',
         '    <a class="dropdown-item" href="#">Secondary link</a>',
         '  </div>',
@@ -442,7 +442,7 @@ describe('Dropdown', () => {
     it('should not toggle a dropdown if the element contains .disabled', done => {
       fixtureEl.innerHTML = [
         '<div class="dropdown">',
-        '  <button href="#" class="btn dropdown-toggle disabled" data-toggle="dropdown">Dropdown</button>',
+        '  <button class="btn dropdown-toggle disabled" data-toggle="dropdown">Dropdown</button>',
         '  <div class="dropdown-menu">',
         '    <a class="dropdown-item" href="#">Secondary link</a>',
         '  </div>',
@@ -468,7 +468,7 @@ describe('Dropdown', () => {
     it('should not toggle a dropdown if the menu is shown', done => {
       fixtureEl.innerHTML = [
         '<div class="dropdown">',
-        '  <button href="#" class="btn dropdown-toggle" data-toggle="dropdown">Dropdown</button>',
+        '  <button class="btn dropdown-toggle" data-toggle="dropdown">Dropdown</button>',
         '  <div class="dropdown-menu show">',
         '    <a class="dropdown-item" href="#">Secondary link</a>',
         '  </div>',
@@ -494,7 +494,7 @@ describe('Dropdown', () => {
     it('should not toggle a dropdown if show event is prevented', done => {
       fixtureEl.innerHTML = [
         '<div class="dropdown">',
-        '  <button href="#" class="btn dropdown-toggle" data-toggle="dropdown">Dropdown</button>',
+        '  <button class="btn dropdown-toggle" data-toggle="dropdown">Dropdown</button>',
         '  <div class="dropdown-menu">',
         '    <a class="dropdown-item" href="#">Secondary link</a>',
         '  </div>',
@@ -526,7 +526,7 @@ describe('Dropdown', () => {
     it('should show a dropdown', done => {
       fixtureEl.innerHTML = [
         '<div class="dropdown">',
-        '  <button href="#" class="btn dropdown-toggle" data-toggle="dropdown">Dropdown</button>',
+        '  <button class="btn dropdown-toggle" data-toggle="dropdown">Dropdown</button>',
         '  <div class="dropdown-menu">',
         '    <a class="dropdown-item" href="#">Secondary link</a>',
         '  </div>',
@@ -548,7 +548,7 @@ describe('Dropdown', () => {
     it('should not show a dropdown if the element is disabled', done => {
       fixtureEl.innerHTML = [
         '<div class="dropdown">',
-        '  <button disabled href="#" class="btn dropdown-toggle" data-toggle="dropdown">Dropdown</button>',
+        '  <button disabled class="btn dropdown-toggle" data-toggle="dropdown">Dropdown</button>',
         '  <div class="dropdown-menu">',
         '    <a class="dropdown-item" href="#">Secondary link</a>',
         '  </div>',
@@ -574,7 +574,7 @@ describe('Dropdown', () => {
     it('should not show a dropdown if the element contains .disabled', done => {
       fixtureEl.innerHTML = [
         '<div class="dropdown">',
-        '  <button href="#" class="btn dropdown-toggle disabled" data-toggle="dropdown">Dropdown</button>',
+        '  <button class="btn dropdown-toggle disabled" data-toggle="dropdown">Dropdown</button>',
         '  <div class="dropdown-menu">',
         '    <a class="dropdown-item" href="#">Secondary link</a>',
         '  </div>',
@@ -600,7 +600,7 @@ describe('Dropdown', () => {
     it('should not show a dropdown if the menu is shown', done => {
       fixtureEl.innerHTML = [
         '<div class="dropdown">',
-        '  <button href="#" class="btn dropdown-toggle" data-toggle="dropdown">Dropdown</button>',
+        '  <button class="btn dropdown-toggle" data-toggle="dropdown">Dropdown</button>',
         '  <div class="dropdown-menu show">',
         '    <a class="dropdown-item" href="#">Secondary link</a>',
         '  </div>',
@@ -626,7 +626,7 @@ describe('Dropdown', () => {
     it('should not show a dropdown if show event is prevented', done => {
       fixtureEl.innerHTML = [
         '<div class="dropdown">',
-        '  <button href="#" class="btn dropdown-toggle" data-toggle="dropdown">Dropdown</button>',
+        '  <button class="btn dropdown-toggle" data-toggle="dropdown">Dropdown</button>',
         '  <div class="dropdown-menu">',
         '    <a class="dropdown-item" href="#">Secondary link</a>',
         '  </div>',
@@ -658,7 +658,7 @@ describe('Dropdown', () => {
     it('should hide a dropdown', done => {
       fixtureEl.innerHTML = [
         '<div class="dropdown">',
-        '  <button href="#" class="btn dropdown-toggle" data-toggle="dropdown">Dropdown</button>',
+        '  <button class="btn dropdown-toggle" data-toggle="dropdown">Dropdown</button>',
         '  <div class="dropdown-menu show">',
         '    <a class="dropdown-item" href="#">Secondary link</a>',
         '  </div>',
@@ -681,7 +681,7 @@ describe('Dropdown', () => {
     it('should hide a dropdown and destroy popper', done => {
       fixtureEl.innerHTML = [
         '<div class="dropdown">',
-        '  <button href="#" class="btn dropdown-toggle" data-toggle="dropdown">Dropdown</button>',
+        '  <button class="btn dropdown-toggle" data-toggle="dropdown">Dropdown</button>',
         '  <div class="dropdown-menu">',
         '    <a class="dropdown-item" href="#">Secondary link</a>',
         '  </div>',
@@ -708,7 +708,7 @@ describe('Dropdown', () => {
     it('should not hide a dropdown if the element is disabled', done => {
       fixtureEl.innerHTML = [
         '<div class="dropdown">',
-        '  <button disabled href="#" class="btn dropdown-toggle" data-toggle="dropdown">Dropdown</button>',
+        '  <button disabled class="btn dropdown-toggle" data-toggle="dropdown">Dropdown</button>',
         '  <div class="dropdown-menu show">',
         '    <a class="dropdown-item" href="#">Secondary link</a>',
         '  </div>',
@@ -735,7 +735,7 @@ describe('Dropdown', () => {
     it('should not hide a dropdown if the element contains .disabled', done => {
       fixtureEl.innerHTML = [
         '<div class="dropdown">',
-        '  <button href="#" class="btn dropdown-toggle disabled" data-toggle="dropdown">Dropdown</button>',
+        '  <button class="btn dropdown-toggle disabled" data-toggle="dropdown">Dropdown</button>',
         '  <div class="dropdown-menu show">',
         '    <a class="dropdown-item" href="#">Secondary link</a>',
         '  </div>',
@@ -762,7 +762,7 @@ describe('Dropdown', () => {
     it('should not hide a dropdown if the menu is not shown', done => {
       fixtureEl.innerHTML = [
         '<div class="dropdown">',
-        '  <button href="#" class="btn dropdown-toggle" data-toggle="dropdown">Dropdown</button>',
+        '  <button class="btn dropdown-toggle" data-toggle="dropdown">Dropdown</button>',
         '  <div class="dropdown-menu">',
         '    <a class="dropdown-item" href="#">Secondary link</a>',
         '  </div>',
@@ -788,7 +788,7 @@ describe('Dropdown', () => {
     it('should not hide a dropdown if hide event is prevented', done => {
       fixtureEl.innerHTML = [
         '<div class="dropdown">',
-        '  <button href="#" class="btn dropdown-toggle" data-toggle="dropdown">Dropdown</button>',
+        '  <button class="btn dropdown-toggle" data-toggle="dropdown">Dropdown</button>',
         '  <div class="dropdown-menu show">',
         '    <a class="dropdown-item" href="#">Secondary link</a>',
         '  </div>',
@@ -821,7 +821,7 @@ describe('Dropdown', () => {
     it('should dispose dropdown', () => {
       fixtureEl.innerHTML = [
         '<div class="dropdown">',
-        '  <button href="#" class="btn dropdown-toggle" data-toggle="dropdown">Dropdown</button>',
+        '  <button class="btn dropdown-toggle" data-toggle="dropdown">Dropdown</button>',
         '  <div class="dropdown-menu">',
         '    <a class="dropdown-item" href="#">Secondary link</a>',
         '  </div>',
@@ -844,7 +844,7 @@ describe('Dropdown', () => {
     it('should dispose dropdown with popper.js', () => {
       fixtureEl.innerHTML = [
         '<div class="dropdown">',
-        '  <button href="#" class="btn dropdown-toggle" data-toggle="dropdown">Dropdown</button>',
+        '  <button class="btn dropdown-toggle" data-toggle="dropdown">Dropdown</button>',
         '  <div class="dropdown-menu">',
         '    <a class="dropdown-item" href="#">Secondary link</a>',
         '  </div>',
@@ -875,7 +875,7 @@ describe('Dropdown', () => {
     it('should call popper.js and detect navbar on update', () => {
       fixtureEl.innerHTML = [
         '<div class="dropdown">',
-        '  <button href="#" class="btn dropdown-toggle" data-toggle="dropdown">Dropdown</button>',
+        '  <button class="btn dropdown-toggle" data-toggle="dropdown">Dropdown</button>',
         '  <div class="dropdown-menu">',
         '    <a class="dropdown-item" href="#">Secondary link</a>',
         '  </div>',
@@ -901,7 +901,7 @@ describe('Dropdown', () => {
     it('should just detect navbar on update', () => {
       fixtureEl.innerHTML = [
         '<div class="dropdown">',
-        '  <button href="#" class="btn dropdown-toggle" data-toggle="dropdown">Dropdown</button>',
+        '  <button class="btn dropdown-toggle" data-toggle="dropdown">Dropdown</button>',
         '  <div class="dropdown-menu">',
         '    <a class="dropdown-item" href="#">Secondary link</a>',
         '  </div>',
@@ -924,7 +924,7 @@ describe('Dropdown', () => {
     it('should not add class position-static to dropdown if boundary not set', done => {
       fixtureEl.innerHTML = [
         '<div class="dropdown">',
-        '  <button href="#" class="btn dropdown-toggle" data-toggle="dropdown">Dropdown</button>',
+        '  <button class="btn dropdown-toggle" data-toggle="dropdown">Dropdown</button>',
         '  <div class="dropdown-menu">',
         '    <a class="dropdown-item" href="#">Secondary link</a>',
         '  </div>',
@@ -945,7 +945,7 @@ describe('Dropdown', () => {
     it('should add class position-static to dropdown if boundary not scrollParent', done => {
       fixtureEl.innerHTML = [
         '<div class="dropdown">',
-        '  <button href="#" class="btn dropdown-toggle" data-toggle="dropdown" data-boundary="viewport">Dropdown</button>',
+        '  <button class="btn dropdown-toggle" data-toggle="dropdown" data-boundary="viewport">Dropdown</button>',
         '  <div class="dropdown-menu">',
         '    <a class="dropdown-item" href="#">Secondary link</a>',
         '  </div>',
@@ -966,7 +966,7 @@ describe('Dropdown', () => {
     it('should show and hide a dropdown', done => {
       fixtureEl.innerHTML = [
         '<div class="dropdown">',
-        '  <button href="#" class="btn dropdown-toggle" data-toggle="dropdown" aria-expanded="false">Dropdown</button>',
+        '  <button class="btn dropdown-toggle" data-toggle="dropdown" aria-expanded="false">Dropdown</button>',
         '  <div class="dropdown-menu">',
         '    <a class="dropdown-item" href="#">Secondary link</a>',
         '  </div>',
@@ -1009,7 +1009,7 @@ describe('Dropdown', () => {
       fixtureEl.innerHTML = [
         '<nav class="navbar navbar-expand-md navbar-light bg-light">',
         '  <div class="dropdown">',
-        '    <button href="#" class="btn dropdown-toggle" data-toggle="dropdown" aria-expanded="false">Dropdown</button>',
+        '    <button class="btn dropdown-toggle" data-toggle="dropdown" aria-expanded="false">Dropdown</button>',
         '    <div class="dropdown-menu">',
         '      <a class="dropdown-item" href="#">Secondary link</a>',
         '    </div>',
@@ -1032,7 +1032,7 @@ describe('Dropdown', () => {
     it('should not use popper.js if display set to static', done => {
       fixtureEl.innerHTML = [
         '<div class="dropdown">',
-        '  <button href="#" class="btn dropdown-toggle" data-toggle="dropdown" data-display="static">Dropdown</button>',
+        '  <button class="btn dropdown-toggle" data-toggle="dropdown" data-display="static">Dropdown</button>',
         '  <div class="dropdown-menu">',
         '    <a class="dropdown-item" href="#">Secondary link</a>',
         '  </div>',
@@ -1055,7 +1055,7 @@ describe('Dropdown', () => {
     it('should remove "show" class if tabbing outside of menu', done => {
       fixtureEl.innerHTML = [
         '<div class="dropdown">',
-        '  <button href="#" class="btn dropdown-toggle" data-toggle="dropdown">Dropdown</button>',
+        '  <button class="btn dropdown-toggle" data-toggle="dropdown">Dropdown</button>',
         '  <div class="dropdown-menu">',
         '    <a class="dropdown-item" href="#">Secondary link</a>',
         '  </div>',
@@ -1197,7 +1197,7 @@ describe('Dropdown', () => {
     it('should fire hide and hidden event without a clickEvent if event type is not click', done => {
       fixtureEl.innerHTML = [
         '<div class="dropdown">',
-        '  <button href="#" class="btn dropdown-toggle" data-toggle="dropdown">Dropdown</button>',
+        '  <button class="btn dropdown-toggle" data-toggle="dropdown">Dropdown</button>',
         '  <div class="dropdown-menu">',
         '    <a class="dropdown-item" href="#sub1">Submenu 1</a>',
         '  </div>',
@@ -1229,7 +1229,7 @@ describe('Dropdown', () => {
     it('should ignore keyboard events within <input>s and <textarea>s', done => {
       fixtureEl.innerHTML = [
         '<div class="dropdown">',
-        '  <button href="#" class="btn dropdown-toggle" data-toggle="dropdown">Dropdown</button>',
+        '  <button class="btn dropdown-toggle" data-toggle="dropdown">Dropdown</button>',
         '  <div class="dropdown-menu">',
         '    <a class="dropdown-item" href="#sub1">Submenu 1</a>',
         '    <input type="text" />',
@@ -1265,7 +1265,7 @@ describe('Dropdown', () => {
     it('should skip disabled element when using keyboard navigation', done => {
       fixtureEl.innerHTML = [
         '<div class="dropdown">',
-        '  <button href="#" class="btn dropdown-toggle" data-toggle="dropdown">Dropdown</button>',
+        '  <button class="btn dropdown-toggle" data-toggle="dropdown">Dropdown</button>',
         '  <div class="dropdown-menu">',
         '    <a class="dropdown-item disabled" href="#sub1">Submenu 1</a>',
         '    <button class="dropdown-item" type="button" disabled>Disabled button</button>',
@@ -1300,7 +1300,7 @@ describe('Dropdown', () => {
         '  }',
         '</style>',
         '<div class="dropdown">',
-        '  <button href="#" class="btn dropdown-toggle" data-toggle="dropdown">Dropdown</button>',
+        '  <button class="btn dropdown-toggle" data-toggle="dropdown">Dropdown</button>',
         '  <div class="dropdown-menu">',
         '    <button class="dropdown-item d-none" type="button">Hidden button by class</button>',
         '    <a class="dropdown-item" href="#sub1" style="display: none">Hidden link</a>',
@@ -1332,7 +1332,7 @@ describe('Dropdown', () => {
     it('should focus next/previous element when using keyboard navigation', done => {
       fixtureEl.innerHTML = [
         '<div class="dropdown">',
-        '  <button href="#" class="btn dropdown-toggle" data-toggle="dropdown">Dropdown</button>',
+        '  <button class="btn dropdown-toggle" data-toggle="dropdown">Dropdown</button>',
         '  <div class="dropdown-menu">',
         '    <a id="item1" class="dropdown-item" href="#">A link</a>',
         '    <a id="item2" class="dropdown-item" href="#">Another link</a>',
@@ -1370,7 +1370,7 @@ describe('Dropdown', () => {
     it('should not close the dropdown if the user clicks on a text field', done => {
       fixtureEl.innerHTML = [
         '<div class="dropdown">',
-        '  <button href="#" class="btn dropdown-toggle" data-toggle="dropdown">Dropdown</button>',
+        '  <button class="btn dropdown-toggle" data-toggle="dropdown">Dropdown</button>',
         '  <div class="dropdown-menu">',
         '    <input type="text" />',
         '  </div>',
@@ -1397,7 +1397,7 @@ describe('Dropdown', () => {
     it('should not close the dropdown if the user clicks on a textarea', done => {
       fixtureEl.innerHTML = [
         '<div class="dropdown">',
-        '  <button href="#" class="btn dropdown-toggle" data-toggle="dropdown">Dropdown</button>',
+        '  <button class="btn dropdown-toggle" data-toggle="dropdown">Dropdown</button>',
         '  <div class="dropdown-menu">',
         '    <textarea></textarea>',
         '  </div>',
@@ -1424,7 +1424,7 @@ describe('Dropdown', () => {
     it('should ignore keyboard events for <input>s and <textarea>s within dropdown-menu, except for escape key', done => {
       fixtureEl.innerHTML = [
         '<div class="dropdown">',
-        '  <button href="#" class="btn dropdown-toggle" data-toggle="dropdown">Dropdown</button>',
+        '  <button class="btn dropdown-toggle" data-toggle="dropdown">Dropdown</button>',
         '  <div class="dropdown-menu">',
         '    <a class="dropdown-item" href="#sub1">Submenu 1</a>',
         '    <input type="text" />',
@@ -1503,7 +1503,7 @@ describe('Dropdown', () => {
       fixtureEl.innerHTML = [
         '<div class="tabs">',
         '  <div class="dropdown">',
-        '    <button disabled href="#" class="btn dropdown-toggle" data-toggle="dropdown">Dropdown</button>',
+        '    <button disabled class="btn dropdown-toggle" data-toggle="dropdown">Dropdown</button>',
         '    <div class="dropdown-menu">',
         '      <a class="dropdown-item" href="#">Secondary link</a>',
         '      <a class="dropdown-item" href="#">Something else here</a>',