diff --git a/tools/test_discoverer/TestDiscoverer.swift b/tools/test_discoverer/TestDiscoverer.swift
index b1bedfabc..ea9a40dff 100644
--- a/tools/test_discoverer/TestDiscoverer.swift
+++ b/tools/test_discoverer/TestDiscoverer.swift
@@ -109,7 +109,7 @@ struct TestDiscoverer: ParsableCommand {
       \(availabilityAttribute)
       @main
       struct Main {
-        static func main() async {
+        static func main() {
           do {
             try XCTestRunner.run()