diff --git a/build.gradle.kts b/build.gradle.kts
index d788fb6..728e05e 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -29,7 +29,7 @@ tasks.register<JavaExec>("scalaTest") {
     dependsOn("testClasses")
     mainClass = "org.scalatest.tools.Runner"
     args = listOf("-R", "build/classes/scala/test", "-o")
-	jvmArgs = listOf("--add-exports=java.base/sun.nio.ch=ALL-UNNAMED") // https://lists.apache.org/thread/p1yrwo126vjx5tht82cktgjbmm2xtpw9
+	jvmArgs = listOf("-Xms128m", "-Xmx512m", "-XX:MetaspaceSize=300m", "-ea", "--add-exports=java.base/sun.nio.ch=ALL-UNNAMED") // https://lists.apache.org/thread/p1yrwo126vjx5tht82cktgjbmm2xtpw9
     classpath = sourceSets.test.get().runtimeClasspath
 }
 
@@ -41,6 +41,7 @@ tasks.withType<Jar> {
     manifest {
         attributes["Main-Class"] = "com.barrelsofdata.sparkexamples.Driver"
     }
+	duplicatesStrategy = DuplicatesStrategy.EXCLUDE
     from (configurations.runtimeClasspath.get().map { if (it.isDirectory()) it else zipTree(it) })
     archiveFileName.set("${archiveBaseName.get()}-${project.version}.${archiveExtension.get()}")
 }