diff --git a/java/test/com/zerotier/sdk/util/StringUtilsTest.java b/java/test/com/zerotier/sdk/util/StringUtilsTest.java
deleted file mode 100644
index 257b14a..0000000
--- a/java/test/com/zerotier/sdk/util/StringUtilsTest.java
+++ /dev/null
@@ -1,73 +0,0 @@
-/*
- * ZeroTier One - Network Virtualization Everywhere
- * Copyright (C) 2011-2023  ZeroTier, Inc.  https://www.zerotier.com/
- */
-
-package com.zerotier.sdk.util;
-
-import static com.google.common.truth.Truth.assertThat;
-
-import org.junit.Test;
-import org.junit.runner.RunWith;
-import org.junit.runners.JUnit4;
-
-@RunWith(JUnit4.class)
-public class StringUtilsTest {
-
-    public StringUtilsTest() {
-    }
-
-    public String oldMacDisplay(long mac) {
-
-        String macStr = Long.toHexString(mac);
-
-        if (macStr.length() > 12) {
-            throw new RuntimeException();
-        }
-
-        while (macStr.length() < 12) {
-            //noinspection StringConcatenationInLoop
-            macStr = "0" + macStr;
-        }
-
-        //noinspection StringBufferReplaceableByString
-        StringBuilder displayMac = new StringBuilder();
-        displayMac.append(macStr.charAt(0));
-        displayMac.append(macStr.charAt(1));
-        displayMac.append(':');
-        displayMac.append(macStr.charAt(2));
-        displayMac.append(macStr.charAt(3));
-        displayMac.append(':');
-        displayMac.append(macStr.charAt(4));
-        displayMac.append(macStr.charAt(5));
-        displayMac.append(':');
-        displayMac.append(macStr.charAt(6));
-        displayMac.append(macStr.charAt(7));
-        displayMac.append(':');
-        displayMac.append(macStr.charAt(8));
-        displayMac.append(macStr.charAt(9));
-        displayMac.append(':');
-        displayMac.append(macStr.charAt(10));
-        displayMac.append(macStr.charAt(11));
-
-        return displayMac.toString();
-    }
-
-    @Test
-    public void testMacDisplay() {
-
-        long mac1 = 1234567891;
-        assertThat(StringUtils.macAddressToString(mac1)).isEqualTo(oldMacDisplay(mac1));
-
-        long mac2 = 999999999;
-        assertThat(StringUtils.macAddressToString(mac2)).isEqualTo(oldMacDisplay(mac2));
-
-        long mac3 = 0x7fffffffffffL;
-        assertThat(StringUtils.macAddressToString(mac3)).isEqualTo(oldMacDisplay(mac3));
-        assertThat(StringUtils.macAddressToString(mac3)).isEqualTo("7f:ff:ff:ff:ff:ff");
-
-        long mac4 = 0x7fafcf3f8fffL;
-        assertThat(StringUtils.macAddressToString(mac4)).isEqualTo(oldMacDisplay(mac4));
-        assertThat(StringUtils.macAddressToString(mac4)).isEqualTo("7f:af:cf:3f:8f:ff");
-    }
-}