diff --git a/src/logging/LogItem.ts b/src/logging/LogItem.ts
index bb8815db..4ddd687c 100644
--- a/src/logging/LogItem.ts
+++ b/src/logging/LogItem.ts
@@ -270,7 +270,7 @@ export function tests() {
         "Login token removed from item": (assert) => {
             const str = "main http://localhost:3000/src/main.js:55\n<anonymous> http://localhost:3000/?loginToken=secret:26";
             const result = filterLoginToken(str);
-            const index = result?.search("secret");
+            const index = result!.search("secret");
             assert.equal(index, -1);
         }
     }