Pass spec down to create WebDriver instance in its tests.

PiperOrigin-RevId: 306809382
diff --git a/test/configs/async_io_config.dart b/test/configs/async_io_config.dart
index 9d0ed83..b45d49b 100644
--- a/test/configs/async_io_config.dart
+++ b/test/configs/async_io_config.dart
@@ -34,7 +34,9 @@
   if (additionalCapabilities != null) {
     capabilities.addAll(additionalCapabilities);
   }
-  return createDriver(desired: capabilities, uri: getWebDriverUri(spec));
+
+  return createDriver(
+      desired: capabilities, uri: getWebDriverUri(spec), spec: spec);
 }
 
 String get forwarderTestPagePath =>
diff --git a/test/configs/sync_io_config.dart b/test/configs/sync_io_config.dart
index faaff12..d376087 100644
--- a/test/configs/sync_io_config.dart
+++ b/test/configs/sync_io_config.dart
@@ -34,7 +34,9 @@
   if (additionalCapabilities != null) {
     capabilities.addAll(additionalCapabilities);
   }
-  return createDriver(desired: capabilities, uri: getWebDriverUri(spec));
+
+  return createDriver(
+      desired: capabilities, uri: getWebDriverUri(spec), spec: spec);
 }
 
 Future<HttpServer> createTestServerAndGoToTestPage(WebDriver driver) async {