diff --git a/utbot-framework/src/main/kotlin/org/utbot/framework/codegen/model/constructor/tree/CgMethodConstructor.kt b/utbot-framework/src/main/kotlin/org/utbot/framework/codegen/model/constructor/tree/CgMethodConstructor.kt
index f6bdc6a901..f2844b0309 100644
--- a/utbot-framework/src/main/kotlin/org/utbot/framework/codegen/model/constructor/tree/CgMethodConstructor.kt
+++ b/utbot-framework/src/main/kotlin/org/utbot/framework/codegen/model/constructor/tree/CgMethodConstructor.kt
@@ -398,7 +398,7 @@ internal class CgMethodConstructor(val context: CgContext) : CgContextOwner by c
     }
 
     private fun String.escapeControlChars() : String {
-        return this.replace("\b", "\\b").replace("\n", "\\n").replace("\t", "\\t").replace("\r", "\\r")
+        return this.replace("\b", "\\b").replace("\n", "\\n").replace("\t", "\\t").replace("\r", "\\r").replace("\\u","\\\\u")
     }
 
     private fun writeWarningAboutCrash() {