diff --git a/repo-scripts/size-analysis/test/size-analysis.test.ts b/repo-scripts/size-analysis/test/size-analysis.test.ts
index 1e1eb768a5b..55326752cbf 100644
--- a/repo-scripts/size-analysis/test/size-analysis.test.ts
+++ b/repo-scripts/size-analysis/test/size-analysis.test.ts
@@ -199,7 +199,8 @@ describe('extractDeclarations on .d.ts file', () => {
 describe('extractDeclarations on js bundle file', () => {
   let subsetExportsBundleFile: string;
   let extractedDeclarations: MemberList;
-  before(() => {
+  before(function () {
+    this.timeout(120000);
     const start = Date.now();
     const testModuleDtsFile: string = getTestModuleDtsFilePath();
     const map: Map<string, string> = buildMap(