diff --git a/.github/.OwlBot.lock.yaml b/.github/.OwlBot.lock.yaml
index 208af3438..d304652e1 100644
--- a/.github/.OwlBot.lock.yaml
+++ b/.github/.OwlBot.lock.yaml
@@ -13,5 +13,5 @@
 # limitations under the License.
 docker:
   image: gcr.io/cloud-devrel-public-resources/owlbot-java:latest
-  digest: sha256:fb7584f6adb3847ac480ed49a4bfe1463965026b2919a1be270e3174f3ce1191
-# created: 2023-10-26T23:22:21.357007231Z
+  digest: sha256:6f431774e11cc46619cf093fd1481193c4024031073697fa18f0099b943aab88
+# created: 2023-12-01T19:50:20.444857406Z
diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index f0aabdd17..e87dfd8ea 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -86,3 +86,27 @@ jobs:
     - run: .kokoro/build.sh
       env:
         JOB_TYPE: clirr
+
+  units-java21:
+    # Building using Java 8 and run the tests with Java 21 runtime
+    name: "units (21)"
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - uses: actions/setup-java@v3
+        with:
+          java-version: 21
+          distribution: temurin
+      - name: "Set jvm system property environment variable for surefire plugin (unit tests)"
+        # Maven surefire plugin (unit tests) allows us to specify JVM to run the tests.
+        # https://maven.apache.org/surefire/maven-surefire-plugin/test-mojo.html#jvm
+        run: echo "SUREFIRE_JVM_OPT=-Djvm=${JAVA_HOME}/bin/java" >> $GITHUB_ENV
+        shell: bash
+      - uses: actions/setup-java@v3
+        with:
+          java-version: 8
+          distribution: temurin
+      - run: .kokoro/install_dependencies.sh
+      - run: .kokoro/build.sh
+        env:
+          JOB_TYPE: test
diff --git a/.kokoro/presubmit/graalvm-native-17.cfg b/.kokoro/presubmit/graalvm-native-17.cfg
index f52533545..fb5bb678f 100644
--- a/.kokoro/presubmit/graalvm-native-17.cfg
+++ b/.kokoro/presubmit/graalvm-native-17.cfg
@@ -3,7 +3,7 @@
 # Configure the docker image for kokoro-trampoline.
 env_vars: {
   key: "TRAMPOLINE_IMAGE"
-  value: "gcr.io/cloud-devrel-kokoro-resources/graalvm17:22.3.2"
+  value: "gcr.io/cloud-devrel-kokoro-resources/graalvm17:22.3.3"
 }
 
 env_vars: {
diff --git a/.kokoro/presubmit/graalvm-native.cfg b/.kokoro/presubmit/graalvm-native.cfg
index 44b100487..59efee340 100644
--- a/.kokoro/presubmit/graalvm-native.cfg
+++ b/.kokoro/presubmit/graalvm-native.cfg
@@ -3,7 +3,7 @@
 # Configure the docker image for kokoro-trampoline.
 env_vars: {
   key: "TRAMPOLINE_IMAGE"
-  value: "gcr.io/cloud-devrel-kokoro-resources/graalvm:22.3.2"
+  value: "gcr.io/cloud-devrel-kokoro-resources/graalvm:22.3.3"
 }
 
 env_vars: {