diff --git a/client/src/utils/strings.test.ts b/client/src/utils/strings.test.ts
index 0b3ddea5edc..52d9c1f1c89 100644
--- a/client/src/utils/strings.test.ts
+++ b/client/src/utils/strings.test.ts
@@ -12,7 +12,7 @@ describe("capitalizeFirstLetter", () => {
     });
 
     it("returns empty string for undefined input", () => {
-        expect(capitalizeFirstLetter(undefined as unknown as string)).toBe("");
+        expect(capitalizeFirstLetter(undefined)).toBe("");
     });
 
     it("returns empty string for null input", () => {
diff --git a/client/src/utils/strings.ts b/client/src/utils/strings.ts
index 2c53c2d466d..80e871912c4 100644
--- a/client/src/utils/strings.ts
+++ b/client/src/utils/strings.ts
@@ -45,7 +45,7 @@ export function snakeCaseToTitleCase(str: string): string {
 /**
  * Capitalize the first letter of a string
  */
-export function capitalizeFirstLetter(str: string): string {
+export function capitalizeFirstLetter(str?: string): string {
     if (!str) {
         return "";
     }