diff --git a/smoke-test/spring-boot-smoke-test-reactive-oauth2-resource-server/build.gradle b/smoke-test/spring-boot-smoke-test-reactive-oauth2-resource-server/build.gradle
index b04beca88ec..9fcc53ee1f4 100644
--- a/smoke-test/spring-boot-smoke-test-reactive-oauth2-resource-server/build.gradle
+++ b/smoke-test/spring-boot-smoke-test-reactive-oauth2-resource-server/build.gradle
@@ -30,3 +30,7 @@ dependencies {
 	testImplementation(project(":starter:spring-boot-starter-security-oauth2-resource-server-test"))
 	testImplementation("com.squareup.okhttp3:mockwebserver")
 }
+
+tasks.named("compileTestJava") {
+	options.nullability.checking = "tests"
+}