diff --git a/module/spring-boot-data-couchbase/build.gradle b/module/spring-boot-data-couchbase/build.gradle
index 44b14afae17..2c41d1cbbe8 100644
--- a/module/spring-boot-data-couchbase/build.gradle
+++ b/module/spring-boot-data-couchbase/build.gradle
@@ -41,3 +41,7 @@ dependencies {
 
 	testRuntimeOnly("ch.qos.logback:logback-classic")
 }
+
+tasks.named("compileTestJava") {
+	options.nullability.checking = "tests"
+}
diff --git a/module/spring-boot-data-couchbase/src/test/java/org/springframework/boot/data/couchbase/autoconfigure/DataCouchbaseAutoConfigurationTests.java b/module/spring-boot-data-couchbase/src/test/java/org/springframework/boot/data/couchbase/autoconfigure/DataCouchbaseAutoConfigurationTests.java
index f8ea724bed1..e860da2048e 100644
--- a/module/spring-boot-data-couchbase/src/test/java/org/springframework/boot/data/couchbase/autoconfigure/DataCouchbaseAutoConfigurationTests.java
+++ b/module/spring-boot-data-couchbase/src/test/java/org/springframework/boot/data/couchbase/autoconfigure/DataCouchbaseAutoConfigurationTests.java
@@ -69,6 +69,7 @@ class DataCouchbaseAutoConfigurationTests {
 		this.contextRunner.withUserConfiguration(EntityScanConfig.class).run((context) -> {
 			CouchbaseMappingContext mappingContext = context.getBean(CouchbaseMappingContext.class);
 			ManagedTypes managedTypes = (ManagedTypes) ReflectionTestUtils.getField(mappingContext, "managedTypes");
+			assertThat(managedTypes).isNotNull();
 			assertThat(managedTypes.toList()).containsOnly(City.class);
 		});
 	}
diff --git a/module/spring-boot-data-couchbase/src/test/java/org/springframework/boot/data/couchbase/autoconfigure/DataCouchbaseReactiveAutoConfigurationTests.java b/module/spring-boot-data-couchbase/src/test/java/org/springframework/boot/data/couchbase/autoconfigure/DataCouchbaseReactiveAutoConfigurationTests.java
index 81ba6af9723..7ab3127f908 100644
--- a/module/spring-boot-data-couchbase/src/test/java/org/springframework/boot/data/couchbase/autoconfigure/DataCouchbaseReactiveAutoConfigurationTests.java
+++ b/module/spring-boot-data-couchbase/src/test/java/org/springframework/boot/data/couchbase/autoconfigure/DataCouchbaseReactiveAutoConfigurationTests.java
@@ -68,6 +68,7 @@ class DataCouchbaseReactiveAutoConfigurationTests {
 		this.contextRunner.withUserConfiguration(EntityScanConfig.class).run((context) -> {
 			CouchbaseMappingContext mappingContext = context.getBean(CouchbaseMappingContext.class);
 			ManagedTypes managedTypes = (ManagedTypes) ReflectionTestUtils.getField(mappingContext, "managedTypes");
+			assertThat(managedTypes).isNotNull();
 			assertThat(managedTypes.toList()).containsOnly(City.class);
 		});
 	}