diff --git a/tests/test_coverage.py b/tests/test_coverage.py
index b614fa4..9f3a7cc 100644
--- a/tests/test_coverage.py
+++ b/tests/test_coverage.py
@@ -18,6 +18,7 @@
     ("spec-axes.json", Axes),
     ("str-axes.json", Axes),
     ("coverage-json.json", Coverage),
+    ("coverage-mixed-type-ndarray.json", Coverage),
     ("doc-example-coverage.json", Coverage),
     ("spec-vertical-profile-coverage.json", Coverage),
     ("spec-trajectory-coverage.json", Coverage),