diff --git a/pkgs/checks/lib/src/extensions/core.dart b/pkgs/checks/lib/src/extensions/core.dart
index 39d2e83..250cbc4 100644
--- a/pkgs/checks/lib/src/extensions/core.dart
+++ b/pkgs/checks/lib/src/extensions/core.dart
@@ -151,7 +151,7 @@
     });
   }
 
-  void startsWith(String other) {
+  void startsWith(Pattern other) {
     context.expect(
       () => ['starts with ${literal(other)}'],
       (actual) {