diff --git a/litho-rendercore-thread-utils/src/main/java/com/facebook/rendercore/thread/utils/RenderCoreThreadUtilsConfig.kt b/litho-rendercore-thread-utils/src/main/java/com/facebook/rendercore/thread/utils/RenderCoreThreadUtilsConfig.kt
index 3f76608065b..9599ba2f8f2 100644
--- a/litho-rendercore-thread-utils/src/main/java/com/facebook/rendercore/thread/utils/RenderCoreThreadUtilsConfig.kt
+++ b/litho-rendercore-thread-utils/src/main/java/com/facebook/rendercore/thread/utils/RenderCoreThreadUtilsConfig.kt
@@ -25,5 +25,5 @@ object RenderCoreThreadUtilsConfig {
    *
    * system property at startup but can be overridden at runtime.
    */
-  @JvmField var isEndToEndTestRun: Boolean = System.getProperty("IS_TESTING") != null
+  @Volatile @JvmField var isEndToEndTestRun: Boolean = System.getProperty("IS_TESTING") != null
 }