diff --git a/functions/helloworld/helloworld/pom.xml b/functions/helloworld/helloworld/pom.xml
index 6beba0255ca..a78a587063e 100644
--- a/functions/helloworld/helloworld/pom.xml
+++ b/functions/helloworld/helloworld/pom.xml
@@ -50,8 +50,8 @@
   <!-- [START functions_example_pom] -->
   <!-- [START functions_example_pom_dependencies] -->
   <properties>
-    <maven.compiler.target>11</maven.compiler.target>
-    <maven.compiler.source>11</maven.compiler.source>
+    <maven.compiler.target>21</maven.compiler.target>
+    <maven.compiler.source>21</maven.compiler.source>
   </properties>
 
   <dependencies>
diff --git a/functions/v2/pubsub/pom.xml b/functions/v2/pubsub/pom.xml
index f50876162b4..3b0ea041b9e 100644
--- a/functions/v2/pubsub/pom.xml
+++ b/functions/v2/pubsub/pom.xml
@@ -31,8 +31,8 @@
   </parent>
 
   <properties>
-    <maven.compiler.target>11</maven.compiler.target>
-    <maven.compiler.source>11</maven.compiler.source>
+    <maven.compiler.target>21</maven.compiler.target>
+    <maven.compiler.source>21</maven.compiler.source>
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
   </properties>
 
@@ -100,6 +100,25 @@
           <functionTarget>functions.SubscribeToTopic</functionTarget>
         </configuration>
       </plugin>
+      <plugin>
+        <groupId>org.jacoco</groupId>
+        <artifactId>jacoco-maven-plugin</artifactId>
+        <version>0.8.11</version>
+        <executions>
+          <execution>
+            <goals>
+              <goal>prepare-agent</goal>
+            </goals>
+          </execution>
+          <execution>
+            <id>report</id>
+            <phase>prepare-package</phase>
+            <goals>
+              <goal>report</goal>
+            </goals>
+          </execution>
+        </executions>
+      </plugin>
       <plugin>
         <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-surefire-plugin</artifactId>