diff --git a/modules/googleapis/0.0.0-20241220-5e258e33/overlay/private/extensions/constants.bzl b/modules/googleapis/0.0.0-20241220-5e258e33/overlay/private/extensions/constants.bzl
index 649b8d65579..8107a7bda3e 100644
--- a/modules/googleapis/0.0.0-20241220-5e258e33/overlay/private/extensions/constants.bzl
+++ b/modules/googleapis/0.0.0-20241220-5e258e33/overlay/private/extensions/constants.bzl
@@ -2,7 +2,7 @@
 # module or to None if the rule is not supported yet.
 RULE_TO_FLAVOR = {
     "cc_gapic_library": None,
-    "cc_grpc_library": None,
+    "cc_grpc_library": "grpc-cc",
     "cc_proto_library": "cc",
     "csharp_gapic_assembly_pkg": None,
     "csharp_gapic_library": None,
diff --git a/modules/googleapis/0.0.0-20241220-5e258e33/overlay/tests/bcr/.bazelrc b/modules/googleapis/0.0.0-20241220-5e258e33/overlay/tests/bcr/.bazelrc
index e0b28aa3c76..467f4958072 100644
--- a/modules/googleapis/0.0.0-20241220-5e258e33/overlay/tests/bcr/.bazelrc
+++ b/modules/googleapis/0.0.0-20241220-5e258e33/overlay/tests/bcr/.bazelrc
@@ -1 +1,5 @@
 common --java_runtime_version=remotejdk_11
+
+# Disable warnings for external dependencies.
+common --per_file_copt=external/.*@-w
+common --host_per_file_copt=external/.*@-w
diff --git a/modules/googleapis/0.0.0-20241220-5e258e33/overlay/tests/bcr/BUILD.bazel b/modules/googleapis/0.0.0-20241220-5e258e33/overlay/tests/bcr/BUILD.bazel
index 1d873e0737d..4399bef3983 100644
--- a/modules/googleapis/0.0.0-20241220-5e258e33/overlay/tests/bcr/BUILD.bazel
+++ b/modules/googleapis/0.0.0-20241220-5e258e33/overlay/tests/bcr/BUILD.bazel
@@ -15,6 +15,11 @@ alias(
     actual = "@googleapis//google/bytestream:bytestream_go_proto",
 )
 
+alias(
+    name = "spanner_cc_grpc",
+    actual = "@googleapis//google/spanner/v1:spanner_cc_grpc",
+)
+
 cc_proto_library_fails_with_message_test(
     name = "bytestream_cc_proto_library_fails_with_message_test",
     target_under_test = "@googleapis//google/bytestream:bytestream_cc_proto",
diff --git a/modules/googleapis/0.0.0-20241220-5e258e33/source.json b/modules/googleapis/0.0.0-20241220-5e258e33/source.json
index d37e10a8dac..3c5104607fa 100644
--- a/modules/googleapis/0.0.0-20241220-5e258e33/source.json
+++ b/modules/googleapis/0.0.0-20241220-5e258e33/source.json
@@ -6,11 +6,11 @@
         "MODULE.bazel": "sha256-MlXxZ/4UxwoscsQihmhKKGw1Cb6P0wAVqvQG56+1n1w=",
         "extensions.bzl": "sha256-jj4EKrYrYsALa4wi11LYl7yULEWhIDr3HyKNnL6LFUE=",
         "private/extensions/BUILD.bazel": "sha256-47DEQpj8HBSa+/TImW+5JCeuQeRkm5NMpJWZG3hSuFU=",
-        "private/extensions/constants.bzl": "sha256-wuxGDkdWcFNlRfcneliNMs8cArVs/Q3vvsxtwRdYBZA=",
+        "private/extensions/constants.bzl": "sha256-O+GJD3XKyq0NoXwTK9Dnocne2uWMB62LlUDPw0BjdWc=",
         "private/extensions/fail_macro.bzl": "sha256-Ux6k9i7qKn7Y0gT1LFnHZiTGuPid7m1p3PncsnK8/iU=",
         "private/extensions/switched_rules.bzl": "sha256-LkAQ/CEVSLYhHb0k1Ym4uBRC0yf6NQugxPZjPZteXMg=",
-        "tests/bcr/.bazelrc": "sha256-R5NStkDbLtIGl0LFZ+A1deot1NjLK5J5sQS33rzcicc=",
-        "tests/bcr/BUILD.bazel": "sha256-OaYTbQXOcLHwR0Am3goLnjCwu3mK7fkfCQlZQvySh24=",
+        "tests/bcr/.bazelrc": "sha256-hFZT+gits3VtXcUkKuh3NCEC9FgBNGuNxaOVCuOiFPk=",
+        "tests/bcr/BUILD.bazel": "sha256-w0YhOe+5oJ32nvhp4TdbNJqVPSoRRztTKmyFv1mbqTc=",
         "tests/bcr/MODULE.bazel": "sha256-PvqkV0oO2SHSkDNVsvcFawocQcrwsVrjL/QiAZ6h+gM=",
         "tests/bcr/failure_test.bzl": "sha256-QV38fwhaAPQStLQr06YGR1NDE/lsgnTs4cDjR/oDpl8="
     }