diff --git a/google-cloud-contrib/google-cloud-nio/src/test/java/com/google/cloud/storage/contrib/nio/CloudStorageFileSystemProviderTest.java b/google-cloud-contrib/google-cloud-nio/src/test/java/com/google/cloud/storage/contrib/nio/CloudStorageFileSystemProviderTest.java
index d476560512f6..970d60217e57 100644
--- a/google-cloud-contrib/google-cloud-nio/src/test/java/com/google/cloud/storage/contrib/nio/CloudStorageFileSystemProviderTest.java
+++ b/google-cloud-contrib/google-cloud-nio/src/test/java/com/google/cloud/storage/contrib/nio/CloudStorageFileSystemProviderTest.java
@@ -649,7 +649,7 @@ public void testProviderEquals() {
   @Test
   public void testNewFileSystem() throws IOException {
     Map<String,String> env = new HashMap<>();
-    FileSystem fs = FileSystems.newFileSystem(URI.create("gs://bucket/path/to/file"), env);
+    FileSystems.newFileSystem(URI.create("gs://bucket/path/to/file"), env);
   }
 
   private static CloudStorageConfiguration permitEmptyPathComponents(boolean value) {