diff --git a/src/test/java/org/janelia/saalfeldlab/n5/codec/BytesTests.java b/src/test/java/org/janelia/saalfeldlab/n5/codec/BytesTests.java
index f911ec6..5d58657 100644
--- a/src/test/java/org/janelia/saalfeldlab/n5/codec/BytesTests.java
+++ b/src/test/java/org/janelia/saalfeldlab/n5/codec/BytesTests.java
@@ -43,6 +43,7 @@ public void testSerialization() {
 						new IdentityCodec()
 				}
 		);
+		writer.createGroup("shard"); //Should already exist, but this will ensure.
 		writer.setAttribute("shard", "/", datasetAttributes);
 		final DatasetAttributes deserialized = writer.getAttribute("shard", "/", DatasetAttributes.class);