diff --git a/core/src/test/java/org/faststats/TestMetrics.java b/core/src/test/java/org/faststats/TestMetrics.java
deleted file mode 100644
index c11f488..0000000
--- a/core/src/test/java/org/faststats/TestMetrics.java
+++ /dev/null
@@ -1,39 +0,0 @@
-package org.faststats;
-
-import org.faststats.chart.SimplePieChart;
-import org.faststats.chart.SingleLineChart;
-import org.jspecify.annotations.NullMarked;
-
-import java.util.UUID;
-import java.util.logging.Level;
-import java.util.logging.Logger;
-
-@NullMarked
-public class TestMetrics extends Metrics {
-    private final Logger logger = Logger.getLogger(getClass().getName());
-
-    public TestMetrics(UUID consumerId, boolean enabled, int projectId) {
-        super(consumerId, enabled, projectId);
-        addChart(new SimplePieChart("online_mode", () -> String.valueOf(true)));
-        addChart(new SimplePieChart("plugin_version", () -> "0.1.0"));
-        addChart(new SimplePieChart("server_type", () -> "Paper"));
-        addChart(new SimplePieChart("server_version", () -> "1.21.4"));
-        addChart(new SingleLineChart("player_amount", () -> 52));
-        startSubmitting();
-    }
-
-    @Override
-    protected void error(String message, Throwable throwable) {
-        logger.log(Level.SEVERE, message, throwable);
-    }
-
-    @Override
-    protected String getURL() {
-        return "http://localhost:5000/metrics";
-    }
-
-    public static void main(String[] args) {
-        new TestMetrics(UUID.randomUUID(), true, 12345);
-        while (true);
-    }
-}
diff --git a/gradle/wrapper/gradle-wrapper.jar b/gradle/wrapper/gradle-wrapper.jar
index 1b33c55..8bdaf60 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 ff23a68..407c905 100644
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -1,6 +1,6 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-8.14.2-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-9.0.0-rc-1-bin.zip
 networkTimeout=10000
 validateDistributionUrl=true
 zipStoreBase=GRADLE_USER_HOME
diff --git a/gradlew b/gradlew
index 23d15a9..ef07e01 100755
--- a/gradlew
+++ b/gradlew
@@ -1,7 +1,7 @@
 #!/bin/sh
 
 #
-# Copyright © 2015-2021 the original authors.
+# Copyright © 2015 the original authors.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.