diff --git a/okio/src/jvmIntegrationTest/java/module-info.java b/okio/src/jvmIntegrationTest/java/module-info.java
index 67f08ae51f..26fa87c2fa 100644
--- a/okio/src/jvmIntegrationTest/java/module-info.java
+++ b/okio/src/jvmIntegrationTest/java/module-info.java
@@ -1,4 +1,5 @@
 open module okio.test.integration {
   requires okio;
   requires junit;
+  requires kotlin.stdlib;
 }
diff --git a/okio/src/jvmIntegrationTest/java/okio/test/integration/ModuleTest.java b/okio/src/jvmIntegrationTest/java/okio/test/integration/ModuleTest.java
deleted file mode 100644
index 0c7668521d..0000000000
--- a/okio/src/jvmIntegrationTest/java/okio/test/integration/ModuleTest.java
+++ /dev/null
@@ -1,20 +0,0 @@
-package okio.test.integration;
-
-import okio.FileSystem;
-import org.junit.Test;
-
-import static org.junit.Assert.*;
-
-public class ModuleTest {
-  @Test
-  public void testModule() {
-    // test okio.test.integration is modular
-    assertTrue(ModuleTest.class.getModule().isNamed());
-    assertEquals(ModuleTest.class.getModule().getName(), "okio.test.integration");
-    assertFalse(ModuleTest.class.getModule().getDescriptor().isAutomatic());
-    // test okio is modular
-    assertTrue(FileSystem.class.getModule().isNamed());
-    assertEquals(FileSystem.class.getModule().getName(), "okio");
-    assertFalse(FileSystem.class.getModule().getDescriptor().isAutomatic());
-  }
-}
diff --git a/okio/src/jvmIntegrationTest/kotlin/okio/test/integration/ModuleTest.kt b/okio/src/jvmIntegrationTest/kotlin/okio/test/integration/ModuleTest.kt
new file mode 100644
index 0000000000..be746bb71a
--- /dev/null
+++ b/okio/src/jvmIntegrationTest/kotlin/okio/test/integration/ModuleTest.kt
@@ -0,0 +1,19 @@
+package okio.test.integration
+
+import okio.FileSystem
+import org.junit.Assert.*
+import org.junit.*
+
+class ModuleTest {
+  @Test
+  fun testModule() {
+    // test okio.test.integration is modular
+    assertTrue(ModuleTest::class.java.module.isNamed)
+    assertEquals(ModuleTest::class.java.module.name, "okio.test.integration")
+    assertFalse(ModuleTest::class.java.module.descriptor.isAutomatic)
+    // test okio is modular
+    assertTrue(FileSystem::class.java.module.isNamed)
+    assertEquals(FileSystem::class.java.module.name, "okio")
+    assertFalse(FileSystem::class.java.module.descriptor.isAutomatic)
+  }
+}