diff --git a/Tests/LibWeb/Fixtures/http-test-server.py b/Tests/LibWeb/Fixtures/http-test-server.py
index d993f40ad85..a50bd6e56b9 100755
--- a/Tests/LibWeb/Fixtures/http-test-server.py
+++ b/Tests/LibWeb/Fixtures/http-test-server.py
@@ -24,7 +24,7 @@ class Echo:
     status: int
     headers: Optional[Dict[str, str]]
     body: Optional[str]
-    delay_ms: Optional[str]
+    delay_ms: Optional[int]
     reason_phrase: Optional[str]