diff --git a/.ci/setupTests.js b/.ci/setupTests.js
index 82edfc9e5a..1d53b0be98 100644
--- a/.ci/setupTests.js
+++ b/.ci/setupTests.js
@@ -2,3 +2,7 @@ import { configure } from 'enzyme';
 import Adapter from 'enzyme-adapter-react-16';
 
 configure({ adapter: new Adapter() });
+
+jest.mock(
+  '../node_modules/react-native/Libraries/LayoutAnimation/LayoutAnimation.js',
+);
diff --git a/src/searchbar/SearchBar-ios.tsx b/src/searchbar/SearchBar-ios.tsx
index b15b49bfe1..370ffc46e3 100644
--- a/src/searchbar/SearchBar-ios.tsx
+++ b/src/searchbar/SearchBar-ios.tsx
@@ -2,7 +2,6 @@ import React, { Component } from 'react';
 import {
   TouchableOpacity,
   LayoutAnimation,
-  UIManager,
   StyleSheet,
   View,
   ActivityIndicator,
@@ -102,8 +101,7 @@ class SearchBar extends Component<
   cancel = () => {
     this.onChangeText('');
     if (this.props.showCancel) {
-      // @ts-ignore
-      UIManager.configureNextLayoutAnimation && LayoutAnimation.easeInEaseOut();
+      LayoutAnimation.configureNext(LayoutAnimation.Presets.easeInEaseOut);
       this.setState({ hasFocus: false });
     }
     setTimeout(() => {
@@ -114,8 +112,7 @@ class SearchBar extends Component<
 
   onFocus: InputProps['onFocus'] = (event) => {
     this.props.onFocus(event);
-    // @ts-ignore
-    UIManager.configureNextLayoutAnimation && LayoutAnimation.easeInEaseOut();
+    LayoutAnimation.configureNext(LayoutAnimation.Presets.easeInEaseOut);
     this.setState({
       hasFocus: true,
       isEmpty: this.props.value === '',
@@ -125,8 +122,7 @@ class SearchBar extends Component<
   onBlur: InputProps['onBlur'] = (event) => {
     this.props.onBlur(event);
     if (!this.props.showCancel) {
-      // @ts-ignore
-      UIManager.configureNextLayoutAnimation && LayoutAnimation.easeInEaseOut();
+      LayoutAnimation.configureNext(LayoutAnimation.Presets.easeInEaseOut);
       this.setState({
         hasFocus: false,
       });
diff --git a/tsconfig.json b/tsconfig.json
index d62d2b57eb..8c3d159835 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -16,17 +16,16 @@
     "outDir": "dist",
     /* Strict Type-Checking Options */
     "strict": false,                           /* Enable all strict type-checking options. */
-    "strictPropertyInitialization": false,
     // "noImplicitAny": true,                 /* Raise error on expressions and declarations with an implied 'any' type. */
     // "strictNullChecks": true,              /* Enable strict null checks. */
     // "strictFunctionTypes": true,           /* Enable strict checking of function types. */
     // "strictPropertyInitialization": true,  /* Enable strict checking of property initialization in classes. */
     // "noImplicitThis": true,                /* Raise error on 'this' expressions with an implied 'any' type. */
     // "alwaysStrict": true,                  /* Parse in strict mode and emit "use strict" for each source file. */
-    // "noUnusedLocals": true,                /* Report errors on unused locals. */
+    "noUnusedLocals": true,                   /* Report errors on unused locals. */
     // "noUnusedParameters": true,            /* Report errors on unused parameters. */
-    // "noImplicitReturns": true,             /* Report error when not all code paths in function return a value. */
-    // "noFallthroughCasesInSwitch": true,    /* Report errors for fallthrough cases in switch statement. */
+    "noImplicitReturns": true,                /* Report error when not all code paths in function return a value. */
+    "noFallthroughCasesInSwitch": true,       /* Report errors for fallthrough cases in switch statement. */
 
     /* Module Resolution Options */
     "moduleResolution": "node",               /* Specify module resolution strategy: 'node' (Node.js) or 'classic' (TypeScript pre-1.6). */