diff --git a/lib/src/tasks/coverage/cli.dart b/lib/src/tasks/coverage/cli.dart
index 4dbc7a67..1584c2a2 100644
--- a/lib/src/tasks/coverage/cli.dart
+++ b/lib/src/tasks/coverage/cli.dart
@@ -95,7 +95,7 @@ class CoverageCli extends TaskCli {
     }
 
     if (result.successful && html && open) {
-      Process.run('open', [result.reportIndex.path]);
+      await Process.run('open', [result.reportIndex.path]);
     }
     return result.successful
         ? new CliResult.success('Coverage collected.')