diff --git a/commafeed-server/pom.xml b/commafeed-server/pom.xml
index c378defb..a8db9fa7 100644
--- a/commafeed-server/pom.xml
+++ b/commafeed-server/pom.xml
@@ -477,7 +477,7 @@
 		<dependency>
 			<groupId>org.mock-server</groupId>
 			<artifactId>mockserver-junit-jupiter</artifactId>
-			<version>6.1.0</version>
+			<version>7.0.0</version>
 			<scope>test</scope>
 		</dependency>
 		<dependency>
diff --git a/commafeed-server/src/test/java/com/commafeed/integration/BaseIT.java b/commafeed-server/src/test/java/com/commafeed/integration/BaseIT.java
index 0eb3fbb4..ad23dd9f 100644
--- a/commafeed-server/src/test/java/com/commafeed/integration/BaseIT.java
+++ b/commafeed-server/src/test/java/com/commafeed/integration/BaseIT.java
@@ -30,8 +30,10 @@ import com.commafeed.frontend.model.request.InitialSetupRequest;
 import com.commafeed.frontend.model.request.SubscribeRequest;
 
 import io.restassured.RestAssured;
+import io.restassured.config.ObjectMapperConfig;
 import io.restassured.http.ContentType;
 import io.restassured.http.Header;
+import io.restassured.mapper.ObjectMapperType;
 import lombok.Getter;
 
 @Getter
@@ -59,6 +61,9 @@ public abstract class BaseIT {
 		URL resource = Objects.requireNonNull(getClass().getResource("/feed/rss.xml"));
 		this.mockServerClient.when(FEED_REQUEST)
 				.respond(HttpResponse.response().withBody(IOUtils.toString(resource, StandardCharsets.UTF_8)));
+
+		// remove when Quarkus supports Jackson 3
+		RestAssured.config = RestAssured.config().objectMapperConfig(new ObjectMapperConfig(ObjectMapperType.JACKSON_2));
 	}
 
 	@AfterEach