diff --git a/buildscripts/kokoro/psm-security.sh b/buildscripts/kokoro/psm-security.sh
index 9e49c26ad6..201772723d 100755
--- a/buildscripts/kokoro/psm-security.sh
+++ b/buildscripts/kokoro/psm-security.sh
@@ -23,6 +23,7 @@ readonly BUILD_APP_PATH="interop-testing/build/install/grpc-interop-testing"
 build_java_test_app() {
   echo "Building Java test app"
   cd "${SRC_DIR}"
+  GRADLE_OPTS="-Dorg.gradle.jvmargs='-Xmx1g'" \
   ./gradlew --no-daemon grpc-interop-testing:installDist -x test \
     -PskipCodegen=true -PskipAndroid=true --console=plain
 
diff --git a/buildscripts/kokoro/xds_k8s_lb.sh b/buildscripts/kokoro/xds_k8s_lb.sh
index 6ca592e742..0284b9e6f7 100755
--- a/buildscripts/kokoro/xds_k8s_lb.sh
+++ b/buildscripts/kokoro/xds_k8s_lb.sh
@@ -23,6 +23,7 @@ readonly BUILD_APP_PATH="interop-testing/build/install/grpc-interop-testing"
 build_java_test_app() {
   echo "Building Java test app"
   cd "${SRC_DIR}"
+  GRADLE_OPTS="-Dorg.gradle.jvmargs='-Xmx1g'" \
   ./gradlew --no-daemon grpc-interop-testing:installDist -x test \
     -PskipCodegen=true -PskipAndroid=true --console=plain
 
diff --git a/buildscripts/kokoro/xds_url_map.sh b/buildscripts/kokoro/xds_url_map.sh
index b2d2e373d0..657f695475 100755
--- a/buildscripts/kokoro/xds_url_map.sh
+++ b/buildscripts/kokoro/xds_url_map.sh
@@ -23,6 +23,7 @@ readonly BUILD_APP_PATH="interop-testing/build/install/grpc-interop-testing"
 build_java_test_app() {
   echo "Building Java test app"
   cd "${SRC_DIR}"
+  GRADLE_OPTS="-Dorg.gradle.jvmargs='-Xmx1g'" \
   ./gradlew --no-daemon grpc-interop-testing:installDist -x test \
     -PskipCodegen=true -PskipAndroid=true --console=plain