diff --git a/packages/dialog/test/lion-dialog.test.js b/packages/dialog/test/lion-dialog.test.js
index dc9395124..bda0d4d66 100644
--- a/packages/dialog/test/lion-dialog.test.js
+++ b/packages/dialog/test/lion-dialog.test.js
@@ -3,6 +3,15 @@ import { expect, fixture, html, unsafeStatic } from '@open-wc/testing';
 import '../lion-dialog.js';
 
 describe('lion-dialog', () => {
+  // For some reason, globalRootNode is not cleared properly on disconnectedCallback from previous overlay test fixtures...
+  // Not sure why this "bug" happens...
+  beforeEach(() => {
+    const globalRootNode = document.querySelector('.global-overlays');
+    if (globalRootNode) {
+      globalRootNode.innerHTML = '';
+    }
+  });
+
   describe('Integration tests', () => {
     const tagString = 'lion-dialog';
     const tag = unsafeStatic(tagString);
diff --git a/packages/form-integrations/test/form-reset.test.js b/packages/form-integrations/test/form-reset.test.js
index b8bf9f945..bae01453c 100644
--- a/packages/form-integrations/test/form-reset.test.js
+++ b/packages/form-integrations/test/form-reset.test.js
@@ -1,22 +1,21 @@
-import { elementUpdated, expect, fixture, html } from '@open-wc/testing';
-
+import '@lion/button/lion-button';
+import '@lion/checkbox-group/lion-checkbox';
+import '@lion/checkbox-group/lion-checkbox-group';
+import { MinLength, Required } from '@lion/form-core';
+import '@lion/form/lion-form';
 import '@lion/input-amount/lion-input-amount';
 import '@lion/input-date/lion-input-date';
-import '@lion/textarea/lion-textarea';
 import '@lion/input-datepicker/lion-input-datepicker';
 import '@lion/input-email/lion-input-email';
 import '@lion/input-iban/lion-input-iban';
 import '@lion/input-range/lion-input-range';
 import '@lion/input/lion-input';
-import '@lion/checkbox-group/lion-checkbox-group';
-import '@lion/checkbox-group/lion-checkbox';
-import '@lion/radio-group/lion-radio-group';
 import '@lion/radio-group/lion-radio';
+import '@lion/radio-group/lion-radio-group';
 import '@lion/select/lion-select';
 import '@lion/switch/lion-switch';
-import '@lion/form/lion-form';
-import '@lion/button/lion-button';
-import { Required, MinLength } from '@lion/form-core';
+import '@lion/textarea/lion-textarea';
+import { elementUpdated, expect, fixture, html } from '@open-wc/testing';
 
 describe(`Submitting/Resetting Form`, async () => {
   let el;
@@ -127,8 +126,6 @@ describe(`Submitting/Resetting Form`, async () => {
     el.querySelector('#submit_button').click();
     await elementUpdated(el);
     el.formElements.forEach(field => {
-      console.log(field);
-      console.log(field.submitted);
       expect(field.submitted).to.be.true;
     });
   });
diff --git a/packages/localize/test/number/formatNumber.test.js b/packages/localize/test/number/formatNumber.test.js
index 610b9793c..17e817e9f 100644
--- a/packages/localize/test/number/formatNumber.test.js
+++ b/packages/localize/test/number/formatNumber.test.js
@@ -1,8 +1,7 @@
 import { expect } from '@open-wc/testing';
 import { localize } from '../../src/localize.js';
-import { localizeTearDown } from '../../test-helpers.js';
-
 import { formatNumber } from '../../src/number/formatNumber.js';
+import { localizeTearDown } from '../../test-helpers.js';
 
 const currencyCode = currency => ({ style: 'currency', currencyDisplay: 'code', currency });
 const currencySymbol = currency => ({ style: 'currency', currencyDisplay: 'symbol', currency });
@@ -310,15 +309,17 @@ describe('formatNumber', () => {
     });
 
     describe('tr-TR', () => {
-      localize.locale = 'tr-TR';
-      expect(formatNumber(123456.789, currencyCode('EUR'))).to.equal('123.456,79 EUR');
-      expect(formatNumber(123456.789, currencyCode('USD'))).to.equal('123.456,79 USD');
-      expect(formatNumber(123456.789, currencyCode('JPY'))).to.equal('123.457 JPY');
-      expect(formatNumber(123456.789, currencyCode('TRY'))).to.equal('123.456,79 TL');
-      expect(formatNumber(123456.789, currencySymbol('EUR'))).to.equal('€123.456,79');
-      expect(formatNumber(123456.789, currencySymbol('USD'))).to.equal('$123.456,79');
-      expect(formatNumber(123456.789, currencySymbol('JPY'))).to.equal('¥123.457');
-      expect(formatNumber(123456.789, currencySymbol('TRY'))).to.equal('₺123.456,79');
+      it('supports basics', () => {
+        localize.locale = 'tr-TR';
+        expect(formatNumber(123456.789, currencyCode('EUR'))).to.equal('123.456,79 EUR');
+        expect(formatNumber(123456.789, currencyCode('USD'))).to.equal('123.456,79 USD');
+        expect(formatNumber(123456.789, currencyCode('JPY'))).to.equal('123.457 JPY');
+        expect(formatNumber(123456.789, currencyCode('TRY'))).to.equal('123.456,79 TL');
+        expect(formatNumber(123456.789, currencySymbol('EUR'))).to.equal('€123.456,79');
+        expect(formatNumber(123456.789, currencySymbol('USD'))).to.equal('$123.456,79');
+        expect(formatNumber(123456.789, currencySymbol('JPY'))).to.equal('¥123.457');
+        expect(formatNumber(123456.789, currencySymbol('TRY'))).to.equal('₺123.456,79');
+      });
     });
   });
 });
diff --git a/packages/overlays/test-suites/OverlayMixin.suite.js b/packages/overlays/test-suites/OverlayMixin.suite.js
index 3d6f30396..db165174a 100644
--- a/packages/overlays/test-suites/OverlayMixin.suite.js
+++ b/packages/overlays/test-suites/OverlayMixin.suite.js
@@ -10,23 +10,24 @@ function getGlobalOverlayNodes() {
 
 export function runOverlayMixinSuite({ tagString, tag, suffix = '' }) {
   describe(`OverlayMixin${suffix}`, () => {
-    let el;
-
-    beforeEach(async () => {
-      el = await fixture(html`
+    it('should not be opened by default', async () => {
+      const el = await fixture(html`
         <${tag}>
           <div slot="content">content of the overlay</div>
           <button slot="invoker">invoker button</button>
         </${tag}>
       `);
-    });
-
-    it('should not be opened by default', async () => {
       expect(el.opened).to.be.false;
       expect(el._overlayCtrl.isShown).to.be.false;
     });
 
     it('syncs opened to overlayController', async () => {
+      const el = await fixture(html`
+        <${tag}>
+          <div slot="content">content of the overlay</div>
+          <button slot="invoker">invoker button</button>
+        </${tag}>
+      `);
       el.opened = true;
       expect(el.opened).to.be.true;
       await nextFrame(); // overlayCtrl show/hide is async
@@ -39,6 +40,12 @@ export function runOverlayMixinSuite({ tagString, tag, suffix = '' }) {
     });
 
     it('syncs OverlayController to opened', async () => {
+      const el = await fixture(html`
+        <${tag}>
+          <div slot="content">content of the overlay</div>
+          <button slot="invoker">invoker button</button>
+        </${tag}>
+      `);
       expect(el.opened).to.be.false;
       await el._overlayCtrl.show();
       expect(el.opened).to.be.true;
@@ -86,7 +93,7 @@ export function runOverlayMixinSuite({ tagString, tag, suffix = '' }) {
 
     it('fires "opened-changed" event on hide', async () => {
       const spy = sinon.spy();
-      el = await fixture(html`
+      const el = await fixture(html`
         <${tag} @opened-changed="${spy}">
           <div slot="content">content of the overlay</div>
           <button slot="invoker">invoker button</button>
@@ -105,7 +112,7 @@ export function runOverlayMixinSuite({ tagString, tag, suffix = '' }) {
 
     it('fires "before-closed" event on hide', async () => {
       const beforeSpy = sinon.spy();
-      el = await fixture(html`
+      const el = await fixture(html`
         <${tag} @before-closed="${beforeSpy}" .opened="${true}">
           <div slot="content">content of the overlay</div>
           <button slot="invoker">invoker button</button>
@@ -121,7 +128,7 @@ export function runOverlayMixinSuite({ tagString, tag, suffix = '' }) {
 
     it('fires before-opened" event on show', async () => {
       const beforeSpy = sinon.spy();
-      el = await fixture(html`
+      const el = await fixture(html`
         <${tag} @before-opened="${beforeSpy}">
           <div slot="content">content of the overlay</div>
           <button slot="invoker">invoker button</button>
@@ -137,7 +144,7 @@ export function runOverlayMixinSuite({ tagString, tag, suffix = '' }) {
       function preventer(ev) {
         ev.preventDefault();
       }
-      el = await fixture(html`
+      const el = await fixture(html`
         <${tag} @before-opened="${preventer}" @before-closed="${preventer}">
           <div slot="content">content of the overlay</div>
           <button slot="invoker">invoker button</button>
@@ -164,7 +171,7 @@ export function runOverlayMixinSuite({ tagString, tag, suffix = '' }) {
         </button>
       `);
 
-      el = await fixture(html`
+      const el = await fixture(html`
         <${tag} opened>
           <div slot="content">
             content of the overlay
@@ -179,6 +186,15 @@ export function runOverlayMixinSuite({ tagString, tag, suffix = '' }) {
   });
 
   describe(`OverlayMixin${suffix} nested`, () => {
+    // For some reason, globalRootNode is not cleared properly on disconnectedCallback from previous overlay test fixtures...
+    // Not sure why this "bug" happens...
+    beforeEach(() => {
+      const globalRootNode = document.querySelector('.global-overlays');
+      if (globalRootNode) {
+        globalRootNode.innerHTML = '';
+      }
+    });
+
     it('supports nested overlays', async () => {
       const el = await fixture(html`
         <${tag}>
@@ -216,7 +232,7 @@ export function runOverlayMixinSuite({ tagString, tag, suffix = '' }) {
         </${tag}>
       `);
 
-      const mainEl = await fixture(html`
+      const el = await fixture(html`
         <${tag} id="main">
           <div slot="content" id="mainContent">
             open nested overlay:
@@ -226,7 +242,7 @@ export function runOverlayMixinSuite({ tagString, tag, suffix = '' }) {
         </${tag}>
       `);
 
-      if (mainEl._overlayCtrl.placementMode === 'global') {
+      if (el._overlayCtrl.placementMode === 'global') {
         // Specifically checking the output in global root node, because the _contentOverlayNode still references
         // the node that was removed in the teardown but hasn't been garbage collected due to reference to it still existing..
 
@@ -240,7 +256,7 @@ export function runOverlayMixinSuite({ tagString, tag, suffix = '' }) {
         );
         expect(lastContentNodeInContainer.firstElementChild.slot).to.equal('content');
       } else {
-        const contentNode = mainEl._overlayContentNode.querySelector('#nestedContent');
+        const contentNode = el._overlayContentNode.querySelector('#nestedContent');
         expect(contentNode).to.not.be.null;
         expect(contentNode.innerText).to.equal('content of the nested overlay');
       }
@@ -257,7 +273,7 @@ export function runOverlayMixinSuite({ tagString, tag, suffix = '' }) {
       const setupOverlayCtrlSpy = sinon.spy(nestedEl, '_setupOverlayCtrl');
       const teardownOverlayCtrlSpy = sinon.spy(nestedEl, '_teardownOverlayCtrl');
 
-      const mainEl = await fixture(html`
+      const el = await fixture(html`
         <${tag} id="main">
           <div slot="content" id="mainContent">
             open nested overlay:
@@ -279,7 +295,7 @@ export function runOverlayMixinSuite({ tagString, tag, suffix = '' }) {
       // And we detect this time the disconnect was 'permanent'
       expect(teardownOverlayCtrlSpy.callCount).to.equal(1);
 
-      mainEl._overlayContentNode.appendChild(nestedEl);
+      el._overlayContentNode.appendChild(nestedEl);
       await aTimeout();
       expect(setupOverlayCtrlSpy.callCount).to.equal(1);
     });
diff --git a/wallaby.js b/wallaby.js
deleted file mode 100644
index 0c4123a16..000000000
--- a/wallaby.js
+++ /dev/null
@@ -1,42 +0,0 @@
-const wallabyWebpack = require('wallaby-webpack'); // eslint-disable-line import/no-extraneous-dependencies
-
-// filter packages, e.g. 'core' / '{radio,radio-button}' / '{form,input*}'
-const packagePattern = '*';
-
-const replaceAll = (str, oldValue, newValue) => str.split(oldValue).join(newValue);
-
-const countOccurences = (str, subbstr) => str.split(subbstr).length - 1;
-
-const makeLionImportsRelative = file => {
-  // example:
-  // file.path: 'packages/package-name/src/my-element.js'
-  // old imports: '@lion/package-name'
-  // new imports: '../../package-name'
-  const nestLevel = countOccurences(file.path, '/') - 1; // 3 - 1 = 2
-  return replaceAll(file.content, '@lion/', '../'.repeat(nestLevel)); // '@lion/' => '../../'
-};
-
-module.exports = () => ({
-  files: [
-    { pattern: `packages/${packagePattern}/*.js`, load: false },
-    { pattern: `packages/${packagePattern}/{src,translations,test}/**/*.js`, load: false },
-    { pattern: `packages/${packagePattern}/test/**/*.test.js`, ignore: true },
-  ],
-  filesWithNoCoverageCalculated: [
-    `packages/${packagePattern}/*.js`,
-    `packages/${packagePattern}/test/**/*.js`,
-  ],
-  tests: [{ pattern: `packages/${packagePattern}/test/**/*.test.js`, load: false }],
-  testFramework: 'mocha',
-  env: {
-    kind: 'chrome',
-  },
-  preprocessors: {
-    '**/*.js': makeLionImportsRelative,
-  },
-  postprocessor: wallabyWebpack(),
-  setup: () => {
-    // required to trigger test loading
-    window.__moduleBundler.loadTests();
-  },
-});