diff --git a/kotlin-native/backend.native/tests/build.gradle b/kotlin-native/backend.native/tests/build.gradle
index 65bb21bf742..722e08c80ef 100644
--- a/kotlin-native/backend.native/tests/build.gradle
+++ b/kotlin-native/backend.native/tests/build.gradle
@@ -114,6 +114,10 @@ if (!isExperimentalMM) {
     }
 }
 
+tasks.withType(KonanCompileNativeBinary).configureEach {
+    extraOpts "-XXLanguage:+ImplicitSignedToUnsignedIntegerConversion"
+}
+
 allprojects {
     // Root directories for test output (logs, compiled files, statistics etc). Only single path must be in each set.
     // backend.native/tests