diff --git a/compiler/__tests__/parser.test.ts b/compiler/__tests__/parser.test.ts
index 02a7862..4678ab3 100644
--- a/compiler/__tests__/parser.test.ts
+++ b/compiler/__tests__/parser.test.ts
@@ -742,4 +742,28 @@ speck Second {
       }
     });
   });
+
+  // Cycle 60: enum interfaces (e.g. CustodyTier) parse as `kind: 'enum'`
+  // and the .proto generator emits a real `enum X { ... }` block.
+  describe('enum interfaces (cycle 60)', () => {
+    it('should classify bare-identifier interfaces as enums', () => {
+      const content = `speck FederatedMeetup {
+  interface CustodyTier {
+    ColdHardware
+    HotSigning
+    ThresholdSplit
+    BackupOnly
+    Compromised
+  }
+}`;
+      const ast = parseSpeckContent(content);
+      const tier = ast.specks[0].members.find(m => m.name === 'CustodyTier');
+      if (tier?.type === 'interface') {
+        expect(tier.kind).toBe('enum');
+        expect(tier.methods.map(m => m.name)).toEqual([
+          'ColdHardware', 'HotSigning', 'ThresholdSplit', 'BackupOnly', 'Compromised'
+        ]);
+      }
+    });
+  });
 });