diff --git a/quarkus/deployment/src/test/java/test/org/keycloak/quarkus/services/health/KeycloakMetricsConfigurationTest.java b/quarkus/deployment/src/test/java/test/org/keycloak/quarkus/services/health/KeycloakMetricsConfigurationTest.java
index 31d9b8fd55fd..dbd4c3b15614 100644
--- a/quarkus/deployment/src/test/java/test/org/keycloak/quarkus/services/health/KeycloakMetricsConfigurationTest.java
+++ b/quarkus/deployment/src/test/java/test/org/keycloak/quarkus/services/health/KeycloakMetricsConfigurationTest.java
@@ -29,8 +29,9 @@
 class KeycloakMetricsConfigurationTest {
 
     @BeforeEach
-    void setUpPort() {
+    void setUp() {
         RestAssured.port = 9001;
+        System.setProperty("KC_CACHE", "local"); // avoid flaky port conflicts
     }
 
     @RegisterExtension
diff --git a/quarkus/deployment/src/test/java/test/org/keycloak/quarkus/services/health/KeycloakNegativeHealthCheckTest.java b/quarkus/deployment/src/test/java/test/org/keycloak/quarkus/services/health/KeycloakNegativeHealthCheckTest.java
index a821544d1abb..e90261e81aae 100644
--- a/quarkus/deployment/src/test/java/test/org/keycloak/quarkus/services/health/KeycloakNegativeHealthCheckTest.java
+++ b/quarkus/deployment/src/test/java/test/org/keycloak/quarkus/services/health/KeycloakNegativeHealthCheckTest.java
@@ -45,6 +45,7 @@ public void testReadinessDown() {
         agroalDataSource.close();
 
         RestAssured.port = 9001;
+        System.setProperty("KC_CACHE", "local"); // avoid flaky port conflicts
         given()
                 .when().get("/health/ready")
                 .then()
diff --git a/quarkus/deployment/src/test/java/test/org/keycloak/quarkus/services/health/KeycloakPathConfigurationTest.java b/quarkus/deployment/src/test/java/test/org/keycloak/quarkus/services/health/KeycloakPathConfigurationTest.java
index c392ff4d5e25..052322852a07 100644
--- a/quarkus/deployment/src/test/java/test/org/keycloak/quarkus/services/health/KeycloakPathConfigurationTest.java
+++ b/quarkus/deployment/src/test/java/test/org/keycloak/quarkus/services/health/KeycloakPathConfigurationTest.java
@@ -30,8 +30,9 @@
 class KeycloakPathConfigurationTest {
 
     @BeforeEach
-    void setUpPort() {
+    void setUp() {
         RestAssured.port = 9001;
+        System.setProperty("KC_CACHE", "local"); // avoid flaky port conflicts
     }
 
     @RegisterExtension
diff --git a/quarkus/deployment/src/test/java/test/org/keycloak/quarkus/services/health/KeycloakReadyHealthCheckTest.java b/quarkus/deployment/src/test/java/test/org/keycloak/quarkus/services/health/KeycloakReadyHealthCheckTest.java
index 12e079979d97..8726e9c19ec0 100644
--- a/quarkus/deployment/src/test/java/test/org/keycloak/quarkus/services/health/KeycloakReadyHealthCheckTest.java
+++ b/quarkus/deployment/src/test/java/test/org/keycloak/quarkus/services/health/KeycloakReadyHealthCheckTest.java
@@ -30,8 +30,9 @@
 public class KeycloakReadyHealthCheckTest {
 
     @BeforeEach
-    void setUpPort() {
+    void setUp() {
         RestAssured.port = 9001;
+        System.setProperty("KC_CACHE", "local"); // avoid flaky port conflicts
     }
 
     @RegisterExtension