diff --git a/util/src/test/java/dev/openrs2/util/StringUtilsTest.java b/util/src/test/java/dev/openrs2/util/StringUtilsTest.java
deleted file mode 100644
index 90a0421928..0000000000
--- a/util/src/test/java/dev/openrs2/util/StringUtilsTest.java
+++ /dev/null
@@ -1,22 +0,0 @@
-package dev.openrs2.util;
-
-import org.junit.jupiter.api.Test;
-
-import static org.junit.jupiter.api.Assertions.assertEquals;
-import static org.junit.jupiter.api.Assertions.assertThrows;
-
-public final class StringUtilsTest {
-	@Test
-	public void testIndefiniteArticle() {
-		assertEquals("a", StringUtils.indefiniteArticle("book"));
-		assertEquals("an", StringUtils.indefiniteArticle("aeroplane"));
-
-		assertThrows(IllegalArgumentException.class, () -> StringUtils.indefiniteArticle(""));
-	}
-
-	@Test
-	public void testCapitalize() {
-		assertEquals("Hello", StringUtils.capitalize("hello"));
-		assertEquals("", StringUtils.capitalize(""));
-	}
-}
diff --git a/util/src/test/java/dev/openrs2/util/StringUtilsTest.kt b/util/src/test/java/dev/openrs2/util/StringUtilsTest.kt
new file mode 100644
index 0000000000..d63374e6cc
--- /dev/null
+++ b/util/src/test/java/dev/openrs2/util/StringUtilsTest.kt
@@ -0,0 +1,24 @@
+package dev.openrs2.util
+
+import dev.openrs2.util.StringUtils.capitalize
+import dev.openrs2.util.StringUtils.indefiniteArticle
+import kotlin.test.Test
+import kotlin.test.assertEquals
+import kotlin.test.assertFailsWith
+
+object StringUtilsTest {
+    @Test
+    fun testIndefiniteArticle() {
+        assertEquals("a", indefiniteArticle("book"))
+        assertEquals("an", indefiniteArticle("aeroplane"))
+        assertFailsWith(IllegalArgumentException::class) {
+            indefiniteArticle("")
+        }
+    }
+
+    @Test
+    fun testCapitalize() {
+        assertEquals("Hello", capitalize("hello"))
+        assertEquals("", capitalize(""))
+    }
+}