diff --git a/src/main/java/io/apicurio/registry/systemtests/framework/KeycloakUtils.java b/src/main/java/io/apicurio/registry/systemtests/framework/KeycloakUtils.java
index 0421ba282..f06383d7a 100644
--- a/src/main/java/io/apicurio/registry/systemtests/framework/KeycloakUtils.java
+++ b/src/main/java/io/apicurio/registry/systemtests/framework/KeycloakUtils.java
@@ -250,7 +250,7 @@ private static HttpRequest.BodyPublisher ofFormData(Map<Object, Object> data) {
         StringBuilder stringBuilder = new StringBuilder();
 
         for (Map.Entry<Object, Object> entry : data.entrySet()) {
-            if (stringBuilder.length() > 0) {
+            if (!stringBuilder.isEmpty()) {
                 stringBuilder.append("&");
             }
 
diff --git a/src/main/java/io/apicurio/registry/systemtests/framework/OperatorUtils.java b/src/main/java/io/apicurio/registry/systemtests/framework/OperatorUtils.java
index cf30a367e..bce2365d0 100644
--- a/src/main/java/io/apicurio/registry/systemtests/framework/OperatorUtils.java
+++ b/src/main/java/io/apicurio/registry/systemtests/framework/OperatorUtils.java
@@ -58,7 +58,7 @@ public static void downloadFile(String source, Path destination) throws Exceptio
 
     public static boolean waitPodsExist(String namespace, String labelKey, String labelValue, TimeoutBudget timeout) {
         while (!timeout.timeoutExpired()) {
-            if (Kubernetes.getPods(namespace, labelKey, labelValue).getItems().size() > 0) {
+            if (!Kubernetes.getPods(namespace, labelKey, labelValue).getItems().isEmpty()) {
                 return true;
             }
 
@@ -71,7 +71,7 @@ public static boolean waitPodsExist(String namespace, String labelKey, String la
             }
         }
 
-        if (Kubernetes.getPods(namespace, labelKey, labelValue).getItems().size() == 0) {
+        if (Kubernetes.getPods(namespace, labelKey, labelValue).getItems().isEmpty()) {
             LOGGER.error(
                     "Pod(s) of catalog source in namespace {} with label {}={} failed creation check.",
                     namespace, labelKey, labelValue
@@ -88,7 +88,7 @@ public static boolean waitPodsExist(String namespace, String labelKey, String la
     }
 
     private static boolean collectPodsReadiness(PodList podList) {
-        if (podList.getItems().size() > 0) {
+        if (!podList.getItems().isEmpty()) {
             boolean allPodsReady = true;
 
             for (Pod p : podList.getItems()) {
@@ -97,7 +97,7 @@ private static boolean collectPodsReadiness(PodList podList) {
                 if (
                         p.getStatus() != null
                         && p.getStatus().getContainerStatuses() != null
-                        && p.getStatus().getContainerStatuses().size() > 0
+                        && !p.getStatus().getContainerStatuses().isEmpty()
                 ) {
                     podReady = p.getStatus().getContainerStatuses().get(0).getReady();
                 }
diff --git a/src/main/java/io/apicurio/registry/systemtests/platform/Kubernetes.java b/src/main/java/io/apicurio/registry/systemtests/platform/Kubernetes.java
index 6ccf7ab22..e8ad22cb0 100644
--- a/src/main/java/io/apicurio/registry/systemtests/platform/Kubernetes.java
+++ b/src/main/java/io/apicurio/registry/systemtests/platform/Kubernetes.java
@@ -284,10 +284,9 @@ public static boolean isRouteReady(String namespace, String name) {
             return false;
         }
 
-        return route
+        return !route
                 .getStatus()
-                .getIngress()
-                .size() > 0;
+                .getIngress().isEmpty();
     }
 
     public static PodList getPods(String namespace, String labelKey, String labelValue) {
@@ -570,13 +569,12 @@ public static void deleteService(String namespace, String name) {
     }
 
     public static boolean isServiceReady(String namespace, Map<String, String> selector) {
-        return getClient()
+        return !getClient()
                 .pods()
                 .inNamespace(namespace)
                 .withLabels(selector)
                 .list()
-                .getItems()
-                .size() > 0;
+                .getItems().isEmpty();
     }
 
     public static PersistentVolumeClaim getPersistentVolumeClaim(String namespace, String name) {
diff --git a/src/main/java/io/apicurio/registry/systemtests/registryinfra/resources/PersistenceKind.java b/src/main/java/io/apicurio/registry/systemtests/registryinfra/resources/PersistenceKind.java
index 3710ad077..28e31db2b 100644
--- a/src/main/java/io/apicurio/registry/systemtests/registryinfra/resources/PersistenceKind.java
+++ b/src/main/java/io/apicurio/registry/systemtests/registryinfra/resources/PersistenceKind.java
@@ -3,5 +3,5 @@
 public enum PersistenceKind {
     MEM,
     SQL,
-    KAFKA_SQL;
+    KAFKA_SQL
 }