diff --git a/test/offset/diverging-test.js b/test/offset/diverging-test.js
index 04d0f40..1faab53 100644
--- a/test/offset/diverging-test.js
+++ b/test/offset/diverging-test.js
@@ -12,6 +12,17 @@
     [[0, 1], [0, 2], [0, 1]],
     [[1, 4], [2, 6], [1, 3]],
     [[4, 9], [6, 8], [3, 7]]
+  ]);
+  test.end();
+});
+
+tape.only("stackOffsetDiverging(series, order) handles a single series", function(test) {
+  var series = [
+    [[1, 2], [2, 4], [3, 4]]
+  ];
+  shape.stackOffsetDiverging(series, shape.stackOrderNone(series));
+  test.deepEqual(series, [
+    [[0, 1], [0, 2], [0, 1]]
   ]);
   test.end();
 });