diff --git a/ts/jest.bzl b/ts/jest.bzl
index a4e68fcff..d9a09007b 100644
--- a/ts/jest.bzl
+++ b/ts/jest.bzl
@@ -39,7 +39,6 @@ def jest_test(deps, name = "jest", protobuf = False):
                 "--resolve-extensions=.mjs,.js",
                 "--log-level=warning",
                 "--platform=node",
-                "--external:protobufjs",
                 "--keep-names",
             ] + esbuild_extra_args,
             entry_point = ts_src,