diff --git a/buildSrc/src/main/java/org/springframework/boot/gradle/JavaConventionsPlugin.java b/buildSrc/src/main/java/org/springframework/boot/gradle/JavaConventionsPlugin.java
index d971174c..f7deabfb 100644
--- a/buildSrc/src/main/java/org/springframework/boot/gradle/JavaConventionsPlugin.java
+++ b/buildSrc/src/main/java/org/springframework/boot/gradle/JavaConventionsPlugin.java
@@ -173,6 +173,11 @@ public class JavaConventionsPlugin implements Plugin<Project> {
 				testLoggingContainer.setShowStackTraces(true);
 				testLoggingContainer.setExceptionFormat(TestExceptionFormat.FULL);
 			});
+			test.jvmArgs(
+					"--add-opens", "java.base/java.lang=ALL-UNNAMED",
+					"--add-opens", "java.base/java.util=ALL-UNNAMED",
+					"--add-opens", "java.base/sun.net=ALL-UNNAMED"
+					);
 			project.getTasks().withType(Checkstyle.class, test::mustRunAfter);
 			project.getTasks().withType(CheckFormat.class, test::mustRunAfter);
 		});
diff --git a/spring-pulsar-sample-apps/build.gradle b/spring-pulsar-sample-apps/build.gradle
index 2e0af1ed..d7d1d662 100644
--- a/spring-pulsar-sample-apps/build.gradle
+++ b/spring-pulsar-sample-apps/build.gradle
@@ -17,6 +17,11 @@ springBoot {
 task bootRunApp1(type: org.springframework.boot.gradle.tasks.run.BootRun, dependsOn: 'build') {
 	group = 'application'
 	mainClass = 'app1.SpringPulsarBootApp'
+	jvmArgs = [
+			"--add-opens", "java.base/java.lang=ALL-UNNAMED",
+			"--add-opens", "java.base/java.util=ALL-UNNAMED",
+			"--add-opens", "java.base/sun.net=ALL-UNNAMED"
+	]
 	doFirst() {
 		classpath = sourceSets.main.runtimeClasspath
 	}
@@ -25,6 +30,11 @@ task bootRunApp1(type: org.springframework.boot.gradle.tasks.run.BootRun, depend
 task bootRunApp2(type: org.springframework.boot.gradle.tasks.run.BootRun, dependsOn: 'build') {
 	group = 'application'
 	mainClass = 'app2.FailoverConsumerApp'
+	jvmArgs = [
+			"--add-opens", "java.base/java.lang=ALL-UNNAMED",
+			"--add-opens", "java.base/java.util=ALL-UNNAMED",
+			"--add-opens", "java.base/sun.net=ALL-UNNAMED"
+	]
 	doFirst() {
 		classpath = sourceSets.main.runtimeClasspath
 	}