diff --git a/apps/web/src/lib/workbook-export.test.ts b/apps/web/src/lib/workbook-export.test.ts
index da83df2..cdea994 100644
--- a/apps/web/src/lib/workbook-export.test.ts
+++ b/apps/web/src/lib/workbook-export.test.ts
@@ -14,7 +14,7 @@ describe("workbook export helpers", () => {
 
     const ExcelJS = await import("exceljs");
     const workbook = new ExcelJS.Workbook();
-    await workbook.xlsx.load(Buffer.from(buffer));
+    await workbook.xlsx.load(buffer as Parameters<typeof workbook.xlsx.load>[0]);
 
     const worksheet = workbook.getWorksheet("Skills");
     expect(worksheet).toBeDefined();
@@ -37,7 +37,7 @@ describe("workbook export helpers", () => {
 
     const ExcelJS = await import("exceljs");
     const workbook = new ExcelJS.Workbook();
-    await workbook.xlsx.load(Buffer.from(buffer));
+    await workbook.xlsx.load(buffer as Parameters<typeof workbook.xlsx.load>[0]);
 
     expect(workbook.worksheets.map((sheet) => sheet.name)).toEqual([
       "Overview",