diff --git a/module/spring-boot-http-codec/build.gradle b/module/spring-boot-http-codec/build.gradle
index eb60c2b976f..10e6a15fff8 100644
--- a/module/spring-boot-http-codec/build.gradle
+++ b/module/spring-boot-http-codec/build.gradle
@@ -30,6 +30,7 @@ dependencies {
 
 	optional(project(":core:spring-boot-autoconfigure"))
 	optional(project(":core:spring-boot-test"))
+	optional(project(":module:spring-boot-gson"))
 	optional(project(":module:spring-boot-jackson"))
 	optional(project(":module:spring-boot-jackson2"))
 	optional(project(":module:spring-boot-kotlinx-serialization-json"))
diff --git a/module/spring-boot-http-codec/src/test/java/org/springframework/boot/http/codec/autoconfigure/CodecsAutoConfigurationTests.java b/module/spring-boot-http-codec/src/test/java/org/springframework/boot/http/codec/autoconfigure/CodecsAutoConfigurationTests.java
index 4e58f4404ad..6c221bcbd68 100644
--- a/module/spring-boot-http-codec/src/test/java/org/springframework/boot/http/codec/autoconfigure/CodecsAutoConfigurationTests.java
+++ b/module/spring-boot-http-codec/src/test/java/org/springframework/boot/http/codec/autoconfigure/CodecsAutoConfigurationTests.java
@@ -20,6 +20,7 @@ import java.util.List;
 import java.util.Map;
 
 import com.fasterxml.jackson.databind.ObjectMapper;
+import com.google.gson.Gson;
 import kotlinx.serialization.json.Json;
 import org.junit.jupiter.api.Test;
 import tools.jackson.databind.json.JsonMapper;
@@ -150,7 +151,7 @@ class CodecsAutoConfigurationTests {
 	@Test
 	void kotlinSerializationUsesUnrestrictedPredicateWhenNoOtherJsonConverterIsAvailable() {
 		FilteredClassLoader classLoader = new FilteredClassLoader(JsonMapper.class.getPackage().getName(),
-				ObjectMapper.class.getPackage().getName());
+				ObjectMapper.class.getPackage().getName(), Gson.class.getPackage().getName());
 		this.contextRunner.withClassLoader(classLoader)
 			.withUserConfiguration(KotlinxJsonConfiguration.class)
 			.run((context) -> {