diff --git a/packages/react-native/ReactAndroid/src/test/java/com/facebook/react/bridge/ReactTestHelper.java b/packages/react-native/ReactAndroid/src/test/java/com/facebook/react/bridge/ReactTestHelper.java
deleted file mode 100644
index 717b689a2b0..00000000000
--- a/packages/react-native/ReactAndroid/src/test/java/com/facebook/react/bridge/ReactTestHelper.java
+++ /dev/null
@@ -1,59 +0,0 @@
-/*
- * Copyright (c) Meta Platforms, Inc. and affiliates.
- *
- * This source code is licensed under the MIT license found in the
- * LICENSE file in the root directory of this source tree.
- */
-
-package com.facebook.react.bridge;
-
-import static org.mockito.Mockito.mock;
-import static org.mockito.Mockito.when;
-
-import com.facebook.react.bridge.queue.MessageQueueThreadSpec;
-import com.facebook.react.bridge.queue.QueueThreadExceptionHandler;
-import com.facebook.react.bridge.queue.ReactQueueConfiguration;
-import com.facebook.react.bridge.queue.ReactQueueConfigurationImpl;
-import com.facebook.react.bridge.queue.ReactQueueConfigurationSpec;
-import com.facebook.react.uimanager.UIManagerModule;
-import org.robolectric.RuntimeEnvironment;
-
-/** Utility for creating pre-configured instances of core react components for tests. */
-public class ReactTestHelper {
-
-  /**
-   * @return a ReactApplicationContext that has a CatalystInstance mock returned by {@link
-   *     #createMockCatalystInstance}
-   */
-  public static ReactApplicationContext createCatalystContextForTest() {
-    ReactApplicationContext context = new ReactApplicationContext(RuntimeEnvironment.application);
-    context.initializeWithInstance(createMockCatalystInstance());
-    return context;
-  }
-
-  /** @return a CatalystInstance mock that has a default working ReactQueueConfiguration. */
-  public static CatalystInstance createMockCatalystInstance() {
-    ReactQueueConfigurationSpec spec =
-        ReactQueueConfigurationSpec.builder()
-            .setJSQueueThreadSpec(MessageQueueThreadSpec.mainThreadSpec())
-            .setNativeModulesQueueThreadSpec(MessageQueueThreadSpec.mainThreadSpec())
-            .build();
-    ReactQueueConfiguration ReactQueueConfiguration =
-        ReactQueueConfigurationImpl.create(
-            spec,
-            new QueueThreadExceptionHandler() {
-              @Override
-              public void handleException(Exception e) {
-                throw new RuntimeException(e);
-              }
-            });
-
-    CatalystInstance reactInstance = mock(CatalystInstance.class);
-    when(reactInstance.getReactQueueConfiguration()).thenReturn(ReactQueueConfiguration);
-    when(reactInstance.getNativeModule(UIManagerModule.class))
-        .thenReturn(mock(UIManagerModule.class));
-    when(reactInstance.isDestroyed()).thenReturn(false);
-
-    return reactInstance;
-  }
-}
diff --git a/packages/react-native/ReactAndroid/src/test/java/com/facebook/react/bridge/ReactTestHelper.kt b/packages/react-native/ReactAndroid/src/test/java/com/facebook/react/bridge/ReactTestHelper.kt
new file mode 100644
index 00000000000..18a49fb04a0
--- /dev/null
+++ b/packages/react-native/ReactAndroid/src/test/java/com/facebook/react/bridge/ReactTestHelper.kt
@@ -0,0 +1,48 @@
+/*
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+package com.facebook.react.bridge
+
+import com.facebook.react.bridge.queue.MessageQueueThreadSpec
+import com.facebook.react.bridge.queue.ReactQueueConfiguration
+import com.facebook.react.bridge.queue.ReactQueueConfigurationImpl
+import com.facebook.react.bridge.queue.ReactQueueConfigurationSpec
+import com.facebook.react.uimanager.UIManagerModule
+import org.mockito.Mockito.mock
+import org.mockito.Mockito.`when` as whenever
+import org.robolectric.RuntimeEnvironment
+
+/** Utility for creating pre-configured instances of core react components for tests. */
+object ReactTestHelper {
+  /**
+   * @return a ReactApplicationContext that has a CatalystInstance mock returned by
+   *   [createMockCatalystInstance]
+   */
+  @JvmStatic
+  fun createCatalystContextForTest(): ReactApplicationContext =
+      ReactApplicationContext(RuntimeEnvironment.application).apply {
+        initializeWithInstance(createMockCatalystInstance())
+      }
+
+  /** @return a CatalystInstance mock that has a default working ReactQueueConfiguration. */
+  @JvmStatic
+  fun createMockCatalystInstance(): CatalystInstance {
+    val spec: ReactQueueConfigurationSpec =
+        ReactQueueConfigurationSpec.builder()
+            .setJSQueueThreadSpec(MessageQueueThreadSpec.mainThreadSpec())
+            .setNativeModulesQueueThreadSpec(MessageQueueThreadSpec.mainThreadSpec())
+            .build()
+    val reactQueueConfiguration: ReactQueueConfiguration =
+        ReactQueueConfigurationImpl.create(spec) { e -> throw RuntimeException(e) }
+    val reactInstance: CatalystInstance = mock(CatalystInstance::class.java)
+    whenever(reactInstance.getReactQueueConfiguration()).thenReturn(reactQueueConfiguration)
+    whenever(reactInstance.getNativeModule(UIManagerModule::class.java))
+        .thenReturn(mock(UIManagerModule::class.java))
+    whenever(reactInstance.isDestroyed()).thenReturn(false)
+    return reactInstance
+  }
+}