diff --git a/packages/calcite-components/src/components/chip-group/chip-group.e2e.ts b/packages/calcite-components/src/components/chip-group/chip-group.e2e.ts
index 228904ca1d3..0349ca0640e 100644
--- a/packages/calcite-components/src/components/chip-group/chip-group.e2e.ts
+++ b/packages/calcite-components/src/components/chip-group/chip-group.e2e.ts
@@ -520,7 +520,7 @@ describe("calcite-chip-group", () => {
       expect(chipSelectSpy1).toHaveReceivedEventTimes(0);
       expect(chipSelectSpy2).toHaveReceivedEventTimes(0);
 
-      await chip5.setAttribute("selected", true);
+      await chip5.toggleAttribute("selected", true);
       await page.waitForChanges();
       expect(chipGroupSelectSpy).toHaveReceivedEventTimes(0);
       expect(chipSelectSpy1).toHaveReceivedEventTimes(0);
@@ -569,7 +569,7 @@ describe("calcite-chip-group", () => {
       expect(await element.getProperty("selectedItems")).toHaveLength(0);
       await selectedItemAsserter([]);
 
-      chip5.setAttribute("selected", true);
+      chip5.toggleAttribute("selected", true);
       await page.waitForChanges();
       expect(chipGroupSelectSpy).toHaveReceivedEventTimes(0);
       expect(chipSelectSpy1).toHaveReceivedEventTimes(0);
@@ -577,7 +577,7 @@ describe("calcite-chip-group", () => {
       expect(await element.getProperty("selectedItems")).toHaveLength(1);
       await selectedItemAsserter([chip5.id]);
 
-      chip4.setAttribute("selected", true);
+      chip4.toggleAttribute("selected", true);
       await page.waitForChanges();
       expect(chipGroupSelectSpy).toHaveReceivedEventTimes(0);
       expect(chipSelectSpy1).toHaveReceivedEventTimes(0);
@@ -617,7 +617,7 @@ describe("calcite-chip-group", () => {
       expect(chipSelectSpy1).toHaveReceivedEventTimes(0);
       expect(chipSelectSpy2).toHaveReceivedEventTimes(0);
 
-      chip5.setAttribute("selected", true);
+      chip5.toggleAttribute("selected", true);
       await page.waitForChanges();
       expect(chipGroupSelectSpy).toHaveReceivedEventTimes(0);
       expect(chipSelectSpy1).toHaveReceivedEventTimes(0);
diff --git a/packages/calcite-components/src/components/chip/chip.e2e.ts b/packages/calcite-components/src/components/chip/chip.e2e.ts
index 5288e6183da..4035db3dd65 100644
--- a/packages/calcite-components/src/components/chip/chip.e2e.ts
+++ b/packages/calcite-components/src/components/chip/chip.e2e.ts
@@ -214,7 +214,7 @@ describe("calcite-chip", () => {
       await page.setContent(`<div class="calcite-mode-dark">${chipSnippet}</div>`);
 
       const chipEl = await page.find(`calcite-chip`);
-      chipEl.setAttribute("closed", true);
+      chipEl.toggleAttribute("closed", true);
       await page.waitForChanges();
 
       expect(await chipEl.isVisible()).toBe(false);
diff --git a/packages/calcite-components/src/components/combobox/combobox.e2e.ts b/packages/calcite-components/src/components/combobox/combobox.e2e.ts
index 1ea369f9674..eec01ad1e14 100644
--- a/packages/calcite-components/src/components/combobox/combobox.e2e.ts
+++ b/packages/calcite-components/src/components/combobox/combobox.e2e.ts
@@ -1632,7 +1632,7 @@ describe("calcite-combobox", () => {
     let element: E2EElement;
     let comboboxItem: E2EElement;
     let itemNestedLi: E2EElement;
-    let closeEvent: Promise<void>;
+    let closeEvent: Promise<unknown>;
 
     beforeEach(async () => {
       page = await newE2EPage();
diff --git a/packages/calcite-components/src/components/functional/XButton.tsx b/packages/calcite-components/src/components/functional/XButton.tsx
index ef331fc6ed4..1263a8020ea 100644
--- a/packages/calcite-components/src/components/functional/XButton.tsx
+++ b/packages/calcite-components/src/components/functional/XButton.tsx
@@ -18,8 +18,6 @@ export const XButton: FunctionalComponent<XButtonProps> = ({
   disabled,
   key,
   label,
-  onClick,
-  ref,
   scale,
 }): VNode => (
   <button
@@ -27,8 +25,6 @@ export const XButton: FunctionalComponent<XButtonProps> = ({
     class={CSS.button}
     disabled={disabled}
     key={key}
-    onClick={onClick}
-    ref={ref}
     tabIndex={-1}
     type="button"
   >
diff --git a/packages/calcite-components/src/components/list-item-group/list-item-group.tsx b/packages/calcite-components/src/components/list-item-group/list-item-group.tsx
index f6a63735f4c..aa1034bab82 100644
--- a/packages/calcite-components/src/components/list-item-group/list-item-group.tsx
+++ b/packages/calcite-components/src/components/list-item-group/list-item-group.tsx
@@ -49,7 +49,7 @@ export class ListItemGroup implements InteractiveComponent {
    * Fires when changes occur in the default slot, notifying parent lists of the changes.
    */
   @Event({ cancelable: false })
-  calciteInternalListItemGroupDefaultSlotChange: EventEmitter<DragEvent>;
+  calciteInternalListItemGroupDefaultSlotChange: EventEmitter<void>;
 
   // --------------------------------------------------------------------------
   //
diff --git a/packages/calcite-components/src/components/list-item/list-item.tsx b/packages/calcite-components/src/components/list-item/list-item.tsx
index 8b0c1882166..6485bd03225 100644
--- a/packages/calcite-components/src/components/list-item/list-item.tsx
+++ b/packages/calcite-components/src/components/list-item/list-item.tsx
@@ -710,7 +710,7 @@ export class ListItem
   //
   // --------------------------------------------------------------------------
 
-  private dragHandleSelectedChangeHandler = (event: CustomEvent): void => {
+  private dragHandleSelectedChangeHandler = (event: CustomEvent<void>): void => {
     this.dragSelected = (event.target as HTMLCalciteHandleElement).selected;
     this.calciteListItemDragHandleChange.emit();
     event.stopPropagation();
diff --git a/packages/calcite-components/src/components/loader/loader.tsx b/packages/calcite-components/src/components/loader/loader.tsx
index 1957ee7be42..ef37a2521a5 100644
--- a/packages/calcite-components/src/components/loader/loader.tsx
+++ b/packages/calcite-components/src/components/loader/loader.tsx
@@ -90,9 +90,9 @@ export class Loader implements LocalizedComponent {
     return (
       <Host
         aria-label={label}
-        aria-valuemax={isDeterminate ? 100 : undefined}
-        aria-valuemin={isDeterminate ? 0 : undefined}
-        aria-valuenow={isDeterminate ? valueNow : undefined}
+        aria-valuemax={isDeterminate ? "100" : undefined}
+        aria-valuemin={isDeterminate ? "0" : undefined}
+        aria-valuenow={isDeterminate ? valueNow.toString() : undefined}
         id={id}
         role="progressbar"
       >
diff --git a/packages/calcite-components/src/components/segmented-control/segmented-control.e2e.ts b/packages/calcite-components/src/components/segmented-control/segmented-control.e2e.ts
index d158d8a703f..6ab935ac255 100644
--- a/packages/calcite-components/src/components/segmented-control/segmented-control.e2e.ts
+++ b/packages/calcite-components/src/components/segmented-control/segmented-control.e2e.ts
@@ -292,7 +292,7 @@ describe("calcite-segmented-control", () => {
 
       async function cycleThroughItemsAndAssertValue(keys: "left-right" | "up-down"): Promise<void> {
         const [moveBeforeArrowKey, moveAfterArrowKey] =
-          keys === "left-right" ? ["ArrowLeft", "ArrowRight"] : ["ArrowUp", "ArrowDown"];
+          keys === "left-right" ? (["ArrowLeft", "ArrowRight"] as const) : (["ArrowUp", "ArrowDown"] as const);
 
         await element.press(moveAfterArrowKey);
         await page.waitForChanges();
diff --git a/packages/calcite-components/src/components/table/table.tsx b/packages/calcite-components/src/components/table/table.tsx
index 14b4094d852..cde12c19056 100644
--- a/packages/calcite-components/src/components/table/table.tsx
+++ b/packages/calcite-components/src/components/table/table.tsx
@@ -250,11 +250,11 @@ export class Table implements LocalizedComponent, LoadableComponent, T9nComponen
   }
 
   @Listen("calciteInternalTableRowFocusRequest")
-  calciteInternalTableRowFocusEvent(event: TableRowFocusEvent): void {
-    const cellPosition = event["detail"].cellPosition;
-    const rowPos = event["detail"].rowPosition;
-    const destination = event["detail"].destination;
-    const lastCell = event["detail"].lastCell;
+  calciteInternalTableRowFocusEvent(event: CustomEvent<TableRowFocusEvent>): void {
+    const cellPosition = event.detail.cellPosition;
+    const rowPos = event.detail.rowPosition;
+    const destination = event.detail.destination;
+    const lastCell = event.detail.lastCell;
 
     const visibleBody = this.bodyRows?.filter((row) => !row.hidden);
     const visibleAll = this.allRows?.filter((row) => !row.hidden);
diff --git a/packages/calcite-components/src/components/text-area/text-area.e2e.ts b/packages/calcite-components/src/components/text-area/text-area.e2e.ts
index 6af572942a7..dfacebe72fb 100644
--- a/packages/calcite-components/src/components/text-area/text-area.e2e.ts
+++ b/packages/calcite-components/src/components/text-area/text-area.e2e.ts
@@ -151,7 +151,7 @@ describe("calcite-text-area", () => {
     await page.setContent("<calcite-text-area></calcite-text-area>");
 
     const element = await page.find("calcite-text-area");
-    element.setAttribute("max-length", 5);
+    element.setAttribute("max-length", "5");
     await page.waitForChanges();
 
     await page.keyboard.press("Tab");
diff --git a/packages/calcite-components/src/components/time-picker/time-picker.tsx b/packages/calcite-components/src/components/time-picker/time-picker.tsx
index d65fcc42bd9..221e7564065 100644
--- a/packages/calcite-components/src/components/time-picker/time-picker.tsx
+++ b/packages/calcite-components/src/components/time-picker/time-picker.tsx
@@ -202,7 +202,7 @@ export class TimePicker
   /**
    * @internal
    */
-  @Event({ cancelable: false }) calciteInternalTimePickerChange: EventEmitter<string>;
+  @Event({ cancelable: false }) calciteInternalTimePickerChange: EventEmitter<void>;
 
   //--------------------------------------------------------------------------
   //
diff --git a/packages/calcite-components/src/tests/commonTests/t9n.ts b/packages/calcite-components/src/tests/commonTests/t9n.ts
index e0ac47e81dc..5788383140a 100644
--- a/packages/calcite-components/src/tests/commonTests/t9n.ts
+++ b/packages/calcite-components/src/tests/commonTests/t9n.ts
@@ -82,7 +82,7 @@ export async function t9n(componentTestSetup: ComponentTestSetup): Promise<void>
             return new Response(new Blob([JSON.stringify(fakeEsMessages, null, 2)], { type: "application/json" }));
           }
 
-          return orig.call(input, init);
+          return orig.call(window, input, init);
         };
       },
       enMessages,
diff --git a/packages/calcite-components/src/utils/dom.spec.ts b/packages/calcite-components/src/utils/dom.spec.ts
index fbdd2fec1ce..1b21a39d995 100644
--- a/packages/calcite-components/src/utils/dom.spec.ts
+++ b/packages/calcite-components/src/utils/dom.spec.ts
@@ -665,8 +665,8 @@ describe("dom", () => {
 
     let element: HTMLDivElement;
     let dispatchTransitionEvent: TransitionEventDispatcher;
-    let onStartCallback: jest.Mock<any, any, any>;
-    let onEndCallback: jest.Mock<any, any, any>;
+    let onStartCallback: jest.Mock;
+    let onEndCallback: jest.Mock;
 
     beforeEach(() => {
       dispatchTransitionEvent = createTransitionEventDispatcher();
@@ -766,8 +766,8 @@ describe("dom", () => {
 
     let element: HTMLDivElement;
     let dispatchAnimationEvent: AnimationEventDispatcher;
-    let onStartCallback: jest.Mock<any, any, any>;
-    let onEndCallback: jest.Mock<any, any, any>;
+    let onStartCallback: jest.Mock;
+    let onEndCallback: jest.Mock;
 
     beforeEach(() => {
       dispatchAnimationEvent = createAnimationEventDispatcher();