diff --git a/spring-boot-tests/spring-boot-integration-tests/spring-boot-launch-script-tests/spring-boot-launch-script-tests-app/build.gradle b/spring-boot-tests/spring-boot-integration-tests/spring-boot-launch-script-tests/spring-boot-launch-script-tests-app/build.gradle
index 9e9dc0d2382..9a21688370f 100644
--- a/spring-boot-tests/spring-boot-integration-tests/spring-boot-launch-script-tests/spring-boot-launch-script-tests-app/build.gradle
+++ b/spring-boot-tests/spring-boot-integration-tests/spring-boot-launch-script-tests/spring-boot-launch-script-tests-app/build.gradle
@@ -5,6 +5,11 @@ plugins {
 
 apply plugin: "io.spring.dependency-management"
 
+java {
+	sourceCompatibility = '17'
+	targetCompatibility = '17'
+}
+
 repositories {
 	maven { url "file:${rootDir}/../docker-test-maven-repository"}
 	mavenCentral()
diff --git a/spring-boot-tests/spring-boot-integration-tests/spring-boot-loader-classic-tests/spring-boot-loader-classic-tests-app/build.gradle b/spring-boot-tests/spring-boot-integration-tests/spring-boot-loader-classic-tests/spring-boot-loader-classic-tests-app/build.gradle
index e7b3725dbbf..f8a908f75f9 100644
--- a/spring-boot-tests/spring-boot-integration-tests/spring-boot-loader-classic-tests/spring-boot-loader-classic-tests-app/build.gradle
+++ b/spring-boot-tests/spring-boot-integration-tests/spring-boot-loader-classic-tests/spring-boot-loader-classic-tests-app/build.gradle
@@ -5,6 +5,11 @@ plugins {
 
 apply plugin: "io.spring.dependency-management"
 
+java {
+	sourceCompatibility = '17'
+	targetCompatibility = '17'
+}
+
 repositories {
 	maven { url "file:${rootDir}/../docker-test-maven-repository"}
 	mavenCentral()
diff --git a/spring-boot-tests/spring-boot-integration-tests/spring-boot-loader-tests/spring-boot-loader-tests-app/build.gradle b/spring-boot-tests/spring-boot-integration-tests/spring-boot-loader-tests/spring-boot-loader-tests-app/build.gradle
index 209479c32ca..90b170798fc 100644
--- a/spring-boot-tests/spring-boot-integration-tests/spring-boot-loader-tests/spring-boot-loader-tests-app/build.gradle
+++ b/spring-boot-tests/spring-boot-integration-tests/spring-boot-loader-tests/spring-boot-loader-tests-app/build.gradle
@@ -5,6 +5,11 @@ plugins {
 
 apply plugin: "io.spring.dependency-management"
 
+java {
+	sourceCompatibility = '17'
+	targetCompatibility = '17'
+}
+
 repositories {
 	maven { url "file:${rootDir}/../docker-test-maven-repository"}
 	mavenCentral()
diff --git a/spring-boot-tests/spring-boot-integration-tests/spring-boot-loader-tests/spring-boot-loader-tests-signed-jar/build.gradle b/spring-boot-tests/spring-boot-integration-tests/spring-boot-loader-tests/spring-boot-loader-tests-signed-jar/build.gradle
index e3554106e64..d3471f6c09d 100644
--- a/spring-boot-tests/spring-boot-integration-tests/spring-boot-loader-tests/spring-boot-loader-tests-signed-jar/build.gradle
+++ b/spring-boot-tests/spring-boot-integration-tests/spring-boot-loader-tests/spring-boot-loader-tests-signed-jar/build.gradle
@@ -7,6 +7,11 @@ plugins {
 
 apply plugin: "io.spring.dependency-management"
 
+java {
+	sourceCompatibility = '17'
+	targetCompatibility = '17'
+}
+
 repositories {
 	maven { url "file:${rootDir}/../docker-test-maven-repository"}
 	mavenCentral()
diff --git a/spring-boot-tests/spring-boot-integration-tests/spring-boot-server-tests/spring-boot-server-tests-app/build.gradle b/spring-boot-tests/spring-boot-integration-tests/spring-boot-server-tests/spring-boot-server-tests-app/build.gradle
index bd73d368e59..ed6d0bdd68f 100644
--- a/spring-boot-tests/spring-boot-integration-tests/spring-boot-server-tests/spring-boot-server-tests-app/build.gradle
+++ b/spring-boot-tests/spring-boot-integration-tests/spring-boot-server-tests/spring-boot-server-tests-app/build.gradle
@@ -9,6 +9,11 @@ plugins {
 
 apply plugin: "io.spring.dependency-management"
 
+java {
+	sourceCompatibility = '17'
+	targetCompatibility = '17'
+}
+
 repositories {
 	maven { url "file:${rootDir}/../test-repository"}
 	mavenCentral()