diff --git a/BUILD b/BUILD
index 1f684e0fc..fa55c907f 100644
--- a/BUILD
+++ b/BUILD
@@ -11,6 +11,7 @@ filegroup(
     srcs = [
         "WORKSPACE",
         "//swift:for_bazel_tests",
+        "//third_party:for_bazel_tests",
         "//tools:for_bazel_tests",
     ],
 )
diff --git a/third_party/BUILD b/third_party/BUILD
index e69de29bb..cd09ba89b 100644
--- a/third_party/BUILD
+++ b/third_party/BUILD
@@ -0,0 +1,11 @@
+# Consumed by Bazel integration tests.
+filegroup(
+    name = "for_bazel_tests",
+    testonly = 1,
+    srcs = glob(["**"]) + [
+        "//third_party/bazel_protos:for_bazel_tests",
+    ],
+    visibility = [
+        "//:__pkg__",
+    ],
+)
diff --git a/third_party/bazel_protos/BUILD b/third_party/bazel_protos/BUILD
index 3fb0a2c80..553d41bc6 100644
--- a/third_party/bazel_protos/BUILD
+++ b/third_party/bazel_protos/BUILD
@@ -13,3 +13,13 @@ cc_proto_library(
     visibility = ["//tools/worker:__pkg__"],
     deps = [":worker_protocol_proto"],
 )
+
+# Consumed by Bazel integration tests.
+filegroup(
+    name = "for_bazel_tests",
+    testonly = 1,
+    srcs = glob(["**"]),
+    visibility = [
+        "//third_party:__pkg__",
+    ],
+)