diff --git a/smoke-test/spring-boot-smoke-test-data-couchbase/build.gradle b/smoke-test/spring-boot-smoke-test-data-couchbase/build.gradle
index 9f52e47ef24..7ae372a06fb 100644
--- a/smoke-test/spring-boot-smoke-test-data-couchbase/build.gradle
+++ b/smoke-test/spring-boot-smoke-test-data-couchbase/build.gradle
@@ -40,3 +40,11 @@ dependencies {
 	dockerTestImplementation("org.testcontainers:junit-jupiter")
 	dockerTestImplementation("org.testcontainers:testcontainers")
 }
+
+tasks.named("compileTestJava") {
+	options.nullability.checking = "tests"
+}
+
+tasks.named("compileDockerTestJava") {
+	options.nullability.checking = "tests"
+}
diff --git a/smoke-test/spring-boot-smoke-test-data-couchbase/src/dockerTest/java/smoketest/data/couchbase/SampleDataCouchbaseApplicationReactiveSslTests.java b/smoke-test/spring-boot-smoke-test-data-couchbase/src/dockerTest/java/smoketest/data/couchbase/SampleDataCouchbaseApplicationReactiveSslTests.java
index 84185517fa0..3c33707d134 100644
--- a/smoke-test/spring-boot-smoke-test-data-couchbase/src/dockerTest/java/smoketest/data/couchbase/SampleDataCouchbaseApplicationReactiveSslTests.java
+++ b/smoke-test/spring-boot-smoke-test-data-couchbase/src/dockerTest/java/smoketest/data/couchbase/SampleDataCouchbaseApplicationReactiveSslTests.java
@@ -63,6 +63,7 @@ class SampleDataCouchbaseApplicationReactiveSslTests {
 		SampleDocument document = new SampleDocument();
 		document.setText("Look, new @DataCouchbaseTest!");
 		document = this.repository.save(document).block(Duration.ofSeconds(30));
+		assertThat(document).isNotNull();
 		assertThat(document.getId()).isNotNull();
 		assertThat(this.couchbaseTemplate.getBucketName()).isEqualTo(BUCKET_NAME);
 		this.repository.deleteAll();