Fix failing test

Author: Gerrit0

src/lib/models/types.ts

@@ -6,7 +6,7 @@ import { ReflectionSymbolId } from "./ReflectionSymbolId.js";
 import type { DeclarationReference } from "#utils";
 import { ReflectionKind } from "./kind.js";
 import { Comment, type CommentDisplayPart } from "./Comment.js";
-import { i18n, joinArray } from "#utils";
+import { i18n, joinArray, NonEnumerable } from "#utils";
 import type { SignatureReflection } from "./SignatureReflection.js";
 
 /**
@@ -917,6 +917,7 @@ export class ReferenceType extends Type {
     preferValues = false;
 
     private _target: ReflectionSymbolId | number;
+    @NonEnumerable
     private _project: ProjectReflection | null;
 
     private constructor(

src/test/issues.c2.test.ts

@@ -553,6 +553,7 @@ describe("Issue Tests", () => {
     });
 
     it("#1898", () => {
+        app.options.setValue("validation", true);
         const project = convert();
         app.validate(project);
         logger.expectMessage(