diff --git a/packages/redux-devtools-ui/src/Tabs/TabsHeader.tsx b/packages/redux-devtools-ui/src/Tabs/TabsHeader.tsx
index f8642375..166535e4 100644
--- a/packages/redux-devtools-ui/src/Tabs/TabsHeader.tsx
+++ b/packages/redux-devtools-ui/src/Tabs/TabsHeader.tsx
@@ -144,8 +144,8 @@ export default class TabsHeader<P> extends Component<Props<P>, State> {
           tabsRef!.getBoundingClientRect().width + this.hiddenTabsWidth[0] <
             tabsWrapperRef!.getBoundingClientRect().width
         ) {
-          hiddenTab = hiddenTabs.shift();
-          visibleTabs.splice(Number(hiddenTab!.key), 0, hiddenTab!);
+          hiddenTab = hiddenTabs.shift()!;
+          visibleTabs.splice(Number(hiddenTab.key), 0, hiddenTab);
           i++;
         }
       } else {
@@ -173,8 +173,8 @@ export default class TabsHeader<P> extends Component<Props<P>, State> {
         tabButtons[i].getBoundingClientRect().right + this.hiddenTabsWidth[0] <
           tabsWrapperRight - this.iconWidth
       ) {
-        hiddenTab = hiddenTabs.shift();
-        visibleTabs.splice(Number(hiddenTab!.key), 0, hiddenTab!);
+        hiddenTab = hiddenTabs.shift()!;
+        visibleTabs.splice(Number(hiddenTab.key), 0, hiddenTab);
         this.hiddenTabsWidth.shift();
         i++;
       }
diff --git a/packages/redux-devtools-utils/src/index.ts b/packages/redux-devtools-utils/src/index.ts
index 98e0f3c3..95732cf9 100644
--- a/packages/redux-devtools-utils/src/index.ts
+++ b/packages/redux-devtools-utils/src/index.ts
@@ -246,6 +246,7 @@ export function getStackTrace(
     typeof Error.stackTraceLimit !== 'number' ||
     Error.stackTraceLimit > traceLimit
   ) {
+    // eslint-disable-next-line @typescript-eslint/no-unnecessary-type-assertion
     const frames = stack!.split('\n');
     if (frames.length > traceLimit) {
       stack = frames