diff --git a/tests/baselines/reference/api/tsserverlibrary.d.ts b/tests/baselines/reference/api/tsserverlibrary.d.ts
index 0120e49f0a5..d8306559986 100644
--- a/tests/baselines/reference/api/tsserverlibrary.d.ts
+++ b/tests/baselines/reference/api/tsserverlibrary.d.ts
@@ -8497,7 +8497,7 @@ declare namespace ts.server {
         private readonly throttledOperations;
         private readonly hostConfiguration;
         private safelist;
-        private legacySafelist;
+        private readonly legacySafelist;
         private pendingProjectUpdates;
         readonly currentDirectory: NormalizedPath;
         readonly toCanonicalFileName: (f: string) => string;