diff --git a/backend/LcmCrdt.Tests/LexboxApiTests.cs b/backend/LcmCrdt.Tests/LexboxApiTests.cs
index a6a7ffc9c..8f1f862f9 100644
--- a/backend/LcmCrdt.Tests/LexboxApiTests.cs
+++ b/backend/LcmCrdt.Tests/LexboxApiTests.cs
@@ -49,6 +49,15 @@ await _api.CreateWritingSystem(WritingSystemType.Analysis,
                 Font = "Arial",
                 Exemplars = []
             });
+        await _api.CreateWritingSystem(WritingSystemType.Vernacular,
+            new WritingSystem()
+            {
+                Id = "en",
+                Name = "English",
+                Abbreviation = "En",
+                Font = "Arial",
+                Exemplars = []
+            });
         await _api.CreateEntry(new Entry
         {
             Id = _entry1Id,