diff --git a/smoke-test/spring-boot-smoke-test-web-groovy-templates/build.gradle b/smoke-test/spring-boot-smoke-test-web-groovy-templates/build.gradle
index 539b4e1e1cc..41be35747e9 100644
--- a/smoke-test/spring-boot-smoke-test-web-groovy-templates/build.gradle
+++ b/smoke-test/spring-boot-smoke-test-web-groovy-templates/build.gradle
@@ -29,3 +29,7 @@ dependencies {
 	testImplementation(project(":starter:spring-boot-starter-test"))
 	testImplementation(project(":starter:spring-boot-starter-webmvc-test"))
 }
+
+tasks.named("compileTestJava") {
+	options.nullability.checking = "tests"
+}
diff --git a/smoke-test/spring-boot-smoke-test-web-groovy-templates/src/test/java/smoketest/groovytemplates/SampleGroovyTemplateApplicationTests.java b/smoke-test/spring-boot-smoke-test-web-groovy-templates/src/test/java/smoketest/groovytemplates/SampleGroovyTemplateApplicationTests.java
index 2f3738f5732..8e96b6a433a 100644
--- a/smoke-test/spring-boot-smoke-test-web-groovy-templates/src/test/java/smoketest/groovytemplates/SampleGroovyTemplateApplicationTests.java
+++ b/smoke-test/spring-boot-smoke-test-web-groovy-templates/src/test/java/smoketest/groovytemplates/SampleGroovyTemplateApplicationTests.java
@@ -62,6 +62,7 @@ class SampleGroovyTemplateApplicationTests {
 		map.set("text", "FOO text");
 		map.set("summary", "FOO");
 		URI location = this.restTemplate.postForLocation("/", map);
+		assertThat(location).isNotNull();
 		assertThat(location.toString()).contains("localhost:" + this.port);
 	}