diff --git a/android/src/main/cpp/NativeProxy.cpp b/android/src/main/cpp/NativeProxy.cpp
index 96c80221880a..1386d81187e2 100644
--- a/android/src/main/cpp/NativeProxy.cpp
+++ b/android/src/main/cpp/NativeProxy.cpp
@@ -474,6 +474,8 @@ void NativeProxy::setGlobalProperties(
   jsRuntime.global().setProperty(
       jsRuntime, "_WORKLET_RUNTIME", workletRuntimeValue);
 
+  jsRuntime.global().setProperty(jsRuntime, "_WORKLET", false);
+
 #ifdef RCT_NEW_ARCH_ENABLED
   jsRuntime.global().setProperty(jsRuntime, "_IS_FABRIC", true);
 #else
diff --git a/ios/REAModule.mm b/ios/REAModule.mm
index 3cb75a0b8cf0..43fd35603ac6 100644
--- a/ios/REAModule.mm
+++ b/ios/REAModule.mm
@@ -215,6 +215,8 @@ - (void)setBridge:(RCTBridge *)bridge
 
     runtime.global().setProperty(runtime, "_WORKLET_RUNTIME", workletRuntimeValue);
 
+    runtime.global().setProperty(runtime, "_WORKLET", false);
+
     runtime.global().setProperty(runtime, "_IS_FABRIC", true);
 
     auto version = getReanimatedVersionString(runtime);
diff --git a/ios/native/REAInitializer.mm b/ios/native/REAInitializer.mm
index 60ee16df3da1..a0ea056dd0f9 100644
--- a/ios/native/REAInitializer.mm
+++ b/ios/native/REAInitializer.mm
@@ -57,6 +57,8 @@ - (void)setBridge:(RCTBridge *)bridge;
 
     runtime.global().setProperty(runtime, "_WORKLET_RUNTIME", workletRuntimeValue);
 
+    runtime.global().setProperty(runtime, "_WORKLET", false);
+
     runtime.global().setProperty(runtime, "_IS_FABRIC", false);
 
     auto version = getReanimatedVersionString(runtime);
diff --git a/src/reanimated2/threads.ts b/src/reanimated2/threads.ts
index bf4e88b39231..b81d4a0583b6 100644
--- a/src/reanimated2/threads.ts
+++ b/src/reanimated2/threads.ts
@@ -123,7 +123,7 @@ export function runOnUIImmediately<A extends any[], R>(
   worklet: ComplexWorkletFunction<A, R>
 ): (...args: A) => void {
   'worklet';
-  if (__DEV__ && !IS_JEST && _WORKLET) {
+  if (__DEV__ && !IS_WEB && _WORKLET) {
     throw new Error(
       'runOnUIImmediately() cannot be called on the UI runtime. Please call the function synchronously or use `queueMicrotask` or `requestAnimationFrame` instead.'
     );
@@ -141,11 +141,12 @@ export function runOnUIImmediately<A extends any[], R>(
   };
 }
 
-if (__DEV__) {
-  try {
-    // eslint-disable-next-line @typescript-eslint/no-empty-function
-    runOnUI(() => {});
-  } catch (e) {
+if (__DEV__ && !IS_WEB) {
+  const f = () => {
+    'worklet';
+  };
+  // @ts-ignore plugin
+  if (f.__workletHash === undefined) {
     throw new Error(
       'Failed to create a worklet. Did you forget to add Reanimated Babel plugin in babel.config.js? See installation docs at https://docs.swmansion.com/react-native-reanimated/docs/fundamentals/installation#babel-plugin.'
     );