diff --git a/buildSrc/build.gradle b/buildSrc/build.gradle
index 21070972d2a23..b74e18390b57d 100644
--- a/buildSrc/build.gradle
+++ b/buildSrc/build.gradle
@@ -61,7 +61,7 @@ Properties props = VersionPropertiesLoader.loadBuildSrcVersion(project.file('ver
 version = props.getProperty("opensearch")
 
 def generateVersionProperties = tasks.register("generateVersionProperties", WriteProperties) {
-  outputFile = "${buildDir}/version.properties"
+  destinationFile = file("${buildDir}/version.properties")
   comment = 'Generated version properties'
   properties(props)
 }
diff --git a/buildSrc/src/main/java/org/opensearch/gradle/OpenSearchTestBasePlugin.java b/buildSrc/src/main/java/org/opensearch/gradle/OpenSearchTestBasePlugin.java
index cdf22407f6076..d6345d2b2df50 100644
--- a/buildSrc/src/main/java/org/opensearch/gradle/OpenSearchTestBasePlugin.java
+++ b/buildSrc/src/main/java/org/opensearch/gradle/OpenSearchTestBasePlugin.java
@@ -38,15 +38,19 @@
 import org.opensearch.gradle.test.ErrorReportingTestListener;
 import org.opensearch.gradle.util.Util;
 import org.gradle.api.Action;
+import org.gradle.api.ExtensiblePolymorphicDomainObjectContainer;
 import org.gradle.api.JavaVersion;
 import org.gradle.api.Plugin;
 import org.gradle.api.Project;
 import org.gradle.api.Task;
 import org.gradle.api.artifacts.Configuration;
 import org.gradle.api.file.FileCollection;
+import org.gradle.api.plugins.jvm.JvmTestSuite;
 import org.gradle.api.tasks.SourceSet;
 import org.gradle.api.tasks.SourceSetContainer;
 import org.gradle.api.tasks.testing.Test;
+import org.gradle.testing.base.TestingExtension;
+import org.gradle.testing.base.TestSuite;
 
 import java.io.File;
 import java.util.HashMap;
@@ -223,7 +227,24 @@ public void execute(Task t) {
                 // Add the shadow JAR artifact itself
                 FileCollection shadowJar = project.files(project.getTasks().named("shadowJar"));
 
-                test.setClasspath(test.getClasspath().minus(mainRuntime).plus(shadowConfig).plus(shadowJar));
+                // See please https://docs.gradle.org/8.1-rc-1/userguide/upgrading_version_8.html#test_task_default_classpath
+                boolean isClasspathSet = false;
+                final TestingExtension testing = project.getExtensions().findByType(TestingExtension.class);
+                if (testing != null) {
+                    final ExtensiblePolymorphicDomainObjectContainer<TestSuite> testSuites = testing.getSuites();
+                    final TestSuite suite = testSuites.findByName("test");
+                    if (suite != null && suite instanceof JvmTestSuite) {
+                        final JvmTestSuite jvmTestSuite = (JvmTestSuite) suite;
+                        test.setClasspath(
+                            jvmTestSuite.getSources().getRuntimeClasspath().minus(mainRuntime).plus(shadowConfig).plus(shadowJar)
+                        );
+                        isClasspathSet = true;
+                    }
+                }
+
+                if (!isClasspathSet) {
+                    test.setClasspath(test.getClasspath().minus(mainRuntime).plus(shadowConfig).plus(shadowJar));
+                }
             });
         });
     }
diff --git a/gradle/wrapper/gradle-wrapper.jar b/gradle/wrapper/gradle-wrapper.jar
index ccebba7710dea..c1962a79e29d3 100644
Binary files a/gradle/wrapper/gradle-wrapper.jar and b/gradle/wrapper/gradle-wrapper.jar differ
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index 21b7e71e15d65..31c902dabbcf4 100644
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -11,7 +11,7 @@
 
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-8.0.2-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.1-rc-1-all.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionSha256Sum=47a5bfed9ef814f90f8debcbbb315e8e7c654109acd224595ea39fca95c5d4da
+distributionSha256Sum=8deb6070b6b84977e80e1605d4ac4f3a7fe6681e788f8295bc4d4f087dcdee30
diff --git a/gradlew b/gradlew
index 79a61d421cc4e..aeb74cbb43e39 100755
--- a/gradlew
+++ b/gradlew
@@ -85,9 +85,6 @@ done
 APP_BASE_NAME=${0##*/}
 APP_HOME=$( cd "${APP_HOME:-./}" && pwd -P ) || exit
 
-# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
-DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
-
 # Use the maximum available, or set MAX_FD != -1 to use that value.
 MAX_FD=maximum
 
@@ -197,6 +194,10 @@ if "$cygwin" || "$msys" ; then
     done
 fi
 
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+
 # Collect all arguments for the java command;
 #   * $DEFAULT_JVM_OPTS, $JAVA_OPTS, and $GRADLE_OPTS can contain fragments of
 #     shell script including quotes and variable substitutions, so put them in
diff --git a/plugins/repository-hdfs/build.gradle b/plugins/repository-hdfs/build.gradle
index 05b992904e6dd..3e80ce1ff00a1 100644
--- a/plugins/repository-hdfs/build.gradle
+++ b/plugins/repository-hdfs/build.gradle
@@ -227,7 +227,8 @@ for (String integTestTaskName : ['integTestHa', 'integTestSecure', 'integTestSec
             .resolve("ports")
         }
         nonInputProperties.systemProperty "test.hdfs-fixture.ports", file("$portsFileDir/ports")
-        classpath += files(portsFileDir)
+        // See please https://docs.gradle.org/8.1-rc-1/userguide/upgrading_version_8.html#test_task_default_classpath
+        classpath = testing.suites.test.sources.runtimeClasspath + files(portsFileDir)
         // Copy ports file to separate location which is placed on the test classpath
         doFirst {
           mkdir(portsFileDir)