diff --git a/test/core/tsi/BUILD b/test/core/tsi/BUILD
index 4e15dc10c64..2c2a31ab90c 100644
--- a/test/core/tsi/BUILD
+++ b/test/core/tsi/BUILD
@@ -76,6 +76,7 @@ grpc_cc_test(
 
 grpc_cc_test(
     name = "ssl_transport_security_test",
+    timeout = "long",
     srcs = ["ssl_transport_security_test.cc"],
     data = [
         "//src/core/tsi/test_creds:badclient.key",