diff --git a/pkg/_fe_analyzer_shared/lib/src/testing/id_testing.dart b/pkg/_fe_analyzer_shared/lib/src/testing/id_testing.dart
index 960bd6ced7c..4483e1a554b 100644
--- a/pkg/_fe_analyzer_shared/lib/src/testing/id_testing.dart
+++ b/pkg/_fe_analyzer_shared/lib/src/testing/id_testing.dart
@@ -1199,11 +1199,6 @@ bool skipForConfig(
       print("Skip: ${testName} for config '${configMarker}'");
       return true;
     }
-    skipList = skipMap[null];
-    if (skipList != null && skipList.contains(testName)) {
-      print("Skip: ${testName} for config '${configMarker}'");
-      return true;
-    }
   }
   return false;
 }
diff --git a/pkg/front_end/test/incremental_utils.dart b/pkg/front_end/test/incremental_utils.dart
index f9e669c0dcb..fb88b6cd000 100644
--- a/pkg/front_end/test/incremental_utils.dart
+++ b/pkg/front_end/test/incremental_utils.dart
@@ -74,7 +74,6 @@ Future<void> throwOnInsufficientUriToSource(
   component.accept(uriFinder);
   Set<Uri> uris = uriFinder.seenUris.toSet();
   uris.removeAll(component.uriToSource.keys);
-  uris.remove(null);
   if (uris.length != 0) {
     throw "Expected 0 uris with no source, but found ${uris.length} ($uris)";
   }