diff --git a/pom.xml b/pom.xml
index 6b9004643c..225e6140ce 100644
--- a/pom.xml
+++ b/pom.xml
@@ -54,24 +54,20 @@
         </dependency>
         <dependency>
             <groupId>io.quarkus</groupId>
-            <artifactId>quarkus-resteasy</artifactId>
+            <artifactId>quarkus-resteasy-reactive-jackson</artifactId>
         </dependency>
         <dependency>
             <groupId>io.quarkus</groupId>
-            <artifactId>quarkus-rest-client</artifactId>
+            <artifactId>quarkus-resteasy-reactive-qute</artifactId>
         </dependency>
         <dependency>
             <groupId>io.quarkus</groupId>
-            <artifactId>quarkus-resteasy-jackson</artifactId>
+            <artifactId>quarkus-rest-client-reactive</artifactId>
         </dependency>
         <dependency>
             <groupId>io.quarkus</groupId>
             <artifactId>quarkus-mutiny</artifactId>
         </dependency>
-        <dependency>
-            <groupId>io.quarkus</groupId>
-            <artifactId>quarkus-resteasy-mutiny</artifactId>
-        </dependency>
         <dependency>
             <groupId>io.quarkus</groupId>
             <artifactId>quarkus-smallrye-context-propagation</artifactId>
@@ -112,10 +108,6 @@
             <groupId>io.quarkus</groupId>
             <artifactId>quarkus-cache</artifactId>
         </dependency>
-        <dependency>
-            <groupId>io.quarkus</groupId>
-            <artifactId>quarkus-resteasy-qute</artifactId>
-        </dependency>
         <dependency>
             <groupId>io.quarkus</groupId>
             <artifactId>quarkus-hibernate-reactive</artifactId>
diff --git a/src/main/java/com/redhat/cloud/notifications/routers/InternalService.java b/src/main/java/com/redhat/cloud/notifications/routers/InternalService.java
index 4d6e1ef17d..0f5a090147 100644
--- a/src/main/java/com/redhat/cloud/notifications/routers/InternalService.java
+++ b/src/main/java/com/redhat/cloud/notifications/routers/InternalService.java
@@ -11,6 +11,7 @@
 import javax.inject.Inject;
 import javax.validation.Valid;
 import javax.validation.constraints.NotNull;
+import javax.ws.rs.Consumes;
 import javax.ws.rs.DELETE;
 import javax.ws.rs.GET;
 import javax.ws.rs.NotFoundException;
@@ -18,11 +19,16 @@
 import javax.ws.rs.PUT;
 import javax.ws.rs.Path;
 import javax.ws.rs.PathParam;
+import javax.ws.rs.Produces;
 import javax.ws.rs.core.Response;
 import java.util.List;
 import java.util.UUID;
 
+import static javax.ws.rs.core.MediaType.APPLICATION_JSON;
+
 @Path("/internal")
+@Consumes(APPLICATION_JSON)
+@Produces(APPLICATION_JSON)
 public class InternalService {
 
     @Inject
diff --git a/src/test/java/com/redhat/cloud/notifications/routers/AuthenticationTest.java b/src/test/java/com/redhat/cloud/notifications/routers/AuthenticationTest.java
index 72f50d2826..5123586dfb 100644
--- a/src/test/java/com/redhat/cloud/notifications/routers/AuthenticationTest.java
+++ b/src/test/java/com/redhat/cloud/notifications/routers/AuthenticationTest.java
@@ -5,6 +5,9 @@
 import com.redhat.cloud.notifications.TestConstants;
 import com.redhat.cloud.notifications.TestHelpers;
 import com.redhat.cloud.notifications.TestLifecycleManager;
+import io.quarkus.cache.Cache;
+import io.quarkus.cache.CacheName;
+import io.quarkus.cache.runtime.caffeine.CaffeineCache;
 import io.quarkus.test.common.QuarkusTestResource;
 import io.quarkus.test.junit.QuarkusTest;
 import io.restassured.RestAssured;
@@ -26,6 +29,9 @@ void beforeEach() {
     @MockServerConfig
     MockServerClientConfig mockServerConfig;
 
+    @CacheName("rbac-cache")
+    Cache cache;
+
     @Test
     void testEndpointRoles() {
         String tenant = "empty";
@@ -40,6 +46,8 @@ void testEndpointRoles() {
                 .then()
                 .statusCode(401);
 
+        clearRbacCache();
+
         // Fetch endpoint without any Rbac details - errors cause 401
         given()
                 // Set header to x-rh-identity
@@ -48,6 +56,8 @@ void testEndpointRoles() {
                 .then()
                 .statusCode(401);
 
+        clearRbacCache();
+
         // Fetch endpoint with no access - Rbac succeed returns 403
         mockServerConfig.addMockRbacAccess(identityHeaderValue, MockServerClientConfig.RbacAccess.NO_ACCESS);
 
@@ -58,6 +68,8 @@ void testEndpointRoles() {
                 .then()
                 .statusCode(403);
 
+        clearRbacCache();
+
         // Test bogus x-rh-identity header that fails Base64 decoding
         given()
                 .header(new Header("x-rh-identity", "00000"))
@@ -65,4 +77,12 @@ void testEndpointRoles() {
                 .then()
                 .statusCode(401);
     }
+
+    private void clearRbacCache() {
+        /*
+         * TODO Replace with real programmatic API call when it will be available. For now we have to rely on this "hack".
+         * See https://github.com/quarkusio/quarkus/pull/8631
+         */
+        ((CaffeineCache) cache).invalidateAll();
+    }
 }
diff --git a/src/test/java/com/redhat/cloud/notifications/routers/NotificationServiceTest.java b/src/test/java/com/redhat/cloud/notifications/routers/NotificationServiceTest.java
index 78779e4b53..198035a7a8 100644
--- a/src/test/java/com/redhat/cloud/notifications/routers/NotificationServiceTest.java
+++ b/src/test/java/com/redhat/cloud/notifications/routers/NotificationServiceTest.java
@@ -9,6 +9,7 @@
 import com.redhat.cloud.notifications.db.DbIsolatedTest;
 import com.redhat.cloud.notifications.db.ResourceHelpers;
 import com.redhat.cloud.notifications.models.Application;
+import com.redhat.cloud.notifications.models.BehaviorGroup;
 import com.redhat.cloud.notifications.models.Endpoint;
 import com.redhat.cloud.notifications.models.EndpointType;
 import com.redhat.cloud.notifications.models.EventType;
@@ -573,6 +574,8 @@ void testInsufficientPrivileges() {
         given()
                 .header(readAccessIdentityHeader)
                 .contentType(ContentType.JSON)
+                // TODO Remove the body when https://github.com/quarkusio/quarkus/issues/16897 is fixed
+                .body(Json.encode(new BehaviorGroup()))
                 .when()
                 .post("/notifications/behaviorGroups")
                 .then()
@@ -582,6 +585,8 @@ void testInsufficientPrivileges() {
                 .header(readAccessIdentityHeader)
                 .contentType(ContentType.JSON)
                 .pathParam("id", UUID.randomUUID())
+                // TODO Remove the body when https://github.com/quarkusio/quarkus/issues/16897 is fixed
+                .body(Json.encode(new BehaviorGroup()))
                 .when()
                 .put("/notifications/behaviorGroups/{id}")
                 .then()