diff --git a/test/__snapshots__/main.test.ts.snap b/test/__snapshots__/main.test.ts.snap
index 4bcca92..b0bbab9 100644
--- a/test/__snapshots__/main.test.ts.snap
+++ b/test/__snapshots__/main.test.ts.snap
@@ -123,6 +123,18 @@ export const CreateCampingError = t.union([
   }, 'OtherError')
 ], 'CreateCampingError')
 
+export interface SingleCaseTaggedUnion {
+  x: number,
+  y: string,
+  _type: 'SingleCase'
+}
+
+export const SingleCaseTaggedUnion = t.type({
+  x: t.Integer,
+  y: t.string,
+  _type: t.literal('SingleCase')
+}, 'SingleCase')
+
 export type Surface =
   | {
   _type: 'Sand'
diff --git a/test/source-tagged-unions.json b/test/source-tagged-unions.json
index 5315d3d..5e86343 100644
--- a/test/source-tagged-unions.json
+++ b/test/source-tagged-unions.json
@@ -87,6 +87,40 @@
       ],
       "desc": "Surface of the camping site",
       "_type": "TaggedUnion"
+    },
+    {
+      "name": "SingleCaseTaggedUnion",
+      "values": [
+        {
+          "name": "SingleCase",
+          "params": [
+            {
+              "name": "x",
+              "tpe": {
+                "name": "Int",
+                "_type": "Name"
+              }
+            },
+            {
+              "name": "y",
+              "tpe": {
+                "name": "String",
+                "_type": "Name"
+              }
+            }
+          ],
+          "desc": "Its only case",
+          "isValueClass": false
+        }
+      ],
+      "desc": "Not really much of a union",
+      "_type": "TaggedUnion"
+    },
+    {
+      "name": "ZeroCaseTaggedUnion",
+      "values": [],
+      "desc": "Nothing at all in here",
+      "_type": "TaggedUnion"
     }
   ]
 }