diff --git a/smoke-test/spring-boot-smoke-test-reactive-oauth2-client/build.gradle b/smoke-test/spring-boot-smoke-test-reactive-oauth2-client/build.gradle
index 5d85b24a9e5..1d7cbc31fee 100644
--- a/smoke-test/spring-boot-smoke-test-reactive-oauth2-client/build.gradle
+++ b/smoke-test/spring-boot-smoke-test-reactive-oauth2-client/build.gradle
@@ -29,3 +29,7 @@ dependencies {
 	testImplementation(project(":starter:spring-boot-starter-webflux-test"))
 	testImplementation("org.apache.httpcomponents.client5:httpclient5")
 }
+
+tasks.named("compileTestJava") {
+	options.nullability.checking = "tests"
+}