diff --git a/src/main/java/io/odh/test/TestConstants.java b/src/main/java/io/odh/test/TestConstants.java
index c25ba54..5074617 100644
--- a/src/main/java/io/odh/test/TestConstants.java
+++ b/src/main/java/io/odh/test/TestConstants.java
@@ -4,8 +4,8 @@
  */
 package io.odh.test;
 
-import java.text.SimpleDateFormat;
 import java.time.Duration;
+import java.time.format.DateTimeFormatter;
 
 public class TestConstants {
     public static final String DEFAULT_NAMESPACE = "default";
@@ -35,7 +35,7 @@ public class TestConstants {
     public static final String CHANNEL_STABLE = "stable";
     public static final String CHANNEL_LATEST = "latest";
 
-    public static final SimpleDateFormat TIMESTAMP_DATE_FORMAT = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ssXXX");
+    public static final DateTimeFormatter TIMESTAMP_DATE_FORMAT = DateTimeFormatter.ISO_INSTANT;
 
     private TestConstants() {
     }
diff --git a/src/main/java/io/odh/test/utils/UpgradeUtils.java b/src/main/java/io/odh/test/utils/UpgradeUtils.java
index 23446bb..03c1a4f 100644
--- a/src/main/java/io/odh/test/utils/UpgradeUtils.java
+++ b/src/main/java/io/odh/test/utils/UpgradeUtils.java
@@ -7,14 +7,14 @@
 import io.odh.test.TestConstants;
 import io.skodjob.testframe.resources.KubeResourceManager;
 
-import java.util.Date;
+import java.time.Instant;
 
 import static io.odh.test.framework.matchers.Matchers.logHasNoUnexpectedErrors;
 import static org.hamcrest.MatcherAssert.assertThat;
 
 public class UpgradeUtils {
 
-    public static void deploymentLogIsErrorEmpty(String namespace, String deploymentName, Date sinceTimestamp) {
+    public static void deploymentLogIsErrorEmpty(String namespace, String deploymentName, Instant sinceTimestamp) {
         // Check that operator doesn't contain errors in logs since sec
         String operatorLog = KubeResourceManager.getKubeClient().getClient().apps().deployments()
                 .inNamespace(namespace).withName(deploymentName).sinceTime(TestConstants.TIMESTAMP_DATE_FORMAT.format(sinceTimestamp)).getLog();
diff --git a/src/test/java/io/odh/test/e2e/upgrade/BundleUpgradeST.java b/src/test/java/io/odh/test/e2e/upgrade/BundleUpgradeST.java
index c76b0d8..ce34c48 100644
--- a/src/test/java/io/odh/test/e2e/upgrade/BundleUpgradeST.java
+++ b/src/test/java/io/odh/test/e2e/upgrade/BundleUpgradeST.java
@@ -27,7 +27,7 @@
 import org.slf4j.LoggerFactory;
 
 import java.io.IOException;
-import java.util.Date;
+import java.time.Instant;
 import java.util.Map;
 
 @SuiteDoc(
@@ -107,7 +107,7 @@ void testUpgradeBundle() throws IOException {
         LabelSelector labelSelector = KubeResourceManager.getKubeClient().getClient().apps().deployments()
                 .inNamespace(OdhConstants.CONTROLLERS_NAMESPACE).withName(OdhConstants.DASHBOARD_CONTROLLER).get().getSpec().getSelector();
         PodUtils.verifyThatPodsAreStable(OdhConstants.CONTROLLERS_NAMESPACE, labelSelector);
-        Date operatorLogCheckTimestamp = new Date();
+        Instant operatorLogCheckTimestamp = Instant.now();
 
         // Verify that NTB pods are stable
         PodUtils.waitForPodsReady(ntbNamespace, lblSelector, 1, true, () -> { });
diff --git a/src/test/java/io/odh/test/e2e/upgrade/OlmUpgradeST.java b/src/test/java/io/odh/test/e2e/upgrade/OlmUpgradeST.java
index d7326c4..8623e45 100644
--- a/src/test/java/io/odh/test/e2e/upgrade/OlmUpgradeST.java
+++ b/src/test/java/io/odh/test/e2e/upgrade/OlmUpgradeST.java
@@ -29,7 +29,7 @@
 import org.slf4j.LoggerFactory;
 
 import java.io.IOException;
-import java.util.Date;
+import java.time.Instant;
 import java.util.Map;
 
 @SuiteDoc(
@@ -110,7 +110,7 @@ void testUpgradeOlm() throws IOException, InterruptedException {
         LabelSelector labelSelector = KubeResourceManager.getKubeClient().getClient()
                 .apps().deployments().inNamespace(OdhConstants.CONTROLLERS_NAMESPACE).withName(OdhConstants.DASHBOARD_CONTROLLER).get().getSpec().getSelector();
         PodUtils.verifyThatPodsAreStable(OdhConstants.CONTROLLERS_NAMESPACE, labelSelector);
-        Date operatorLogCheckTimestamp = new Date();
+        Instant operatorLogCheckTimestamp = Instant.now();
 
         // Verify that NTB pods are stable
         PodUtils.waitForPodsReady(ntbNamespace, lblSelector, 1, true, () -> { });