diff --git a/tests/test_runner.py b/tests/test_runner.py
index 4e81605..0d64cbe 100644
--- a/tests/test_runner.py
+++ b/tests/test_runner.py
@@ -226,6 +226,12 @@ async def verify(self, *args: Any, **kwargs: Any) -> ClaimResult:
         return self.results.pop(0)
 
 
+async def _skip_preflight(url: str) -> None:
+    """No-op ``_preflight_url`` replacement for tests that don't want the real HTTP HEAD probe."""
+    del url
+    return None
+
+
 def _build_runner(
     module: Any,
     tmp_path: Path,
@@ -262,10 +268,6 @@ def _build_runner(
     if hasattr(verifier, "browser_manager"):
         verifier.browser_manager = browser
 
-    async def _skip_preflight(url: str) -> None:
-        del url
-        return None
-
     setattr(runner, "_preflight_url", _skip_preflight)
 
     return runner, browser, verifier
@@ -293,10 +295,6 @@ def _build_visualize_override_runner(
         navigator_client=FakeNavigatorClient([]),
     )
 
-    async def _skip_preflight(url: str) -> None:
-        del url
-        return None
-
     runner._preflight_url = _skip_preflight
     return runner